| inherent variation in stable isotope values and discrimination factors in two life stages of green turtles. | we examine inherent variation in carbon and nitrogen stable isotope values of multiple soft tissues from a population of captive green turtles chelonia mydas to determine the extent of isotopic variation due to individual differences in physiology. we compare the measured inherent variation in the captive population with the isotopic variation observed in a wild population of juvenile green turtles. additionally, we measure diet-tissue discrimination factors to determine the offset that occurs b ... | 2013 | 22902371 |
| to eat or not to eat? debris selectivity by marine turtles. | marine debris is a growing problem for wildlife, and has been documented to affect more than 267 species worldwide. we investigated the prevalence of marine debris ingestion in 115 sea turtles stranded in queensland between 2006-2011, and assessed how the ingestion rates differ between species (eretmochelys imbricata vs. chelonia mydas) and by turtle size class (smaller oceanic feeders vs. larger benthic feeders). concurrently, we conducted 25 beach surveys to estimate the composition of the deb ... | 2012 | 22829894 |
| the role of turtles as coral reef macroherbivores. | herbivory is widely accepted as a vital function on coral reefs. to date, the majority of studies examining herbivory in coral reef environments have focused on the roles of fishes and/or urchins, with relatively few studies considering the potential role of macroherbivores in reef processes. here, we introduce evidence that highlights the potential role of marine turtles as herbivores on coral reefs. while conducting experimental habitat manipulations to assess the roles of herbivorous reef fis ... | 2012 | 22768189 |
| reconstruction of paternal genotypes over multiple breeding seasons reveals male green turtles do not breed annually. | for species of conservation concern, knowledge of key life-history and demographic components, such as the number and sex ratio of breeding adults, is essential for accurate assessments of population viability. species with temperature-dependent sex determination can produce heavily biased primary sex ratios, and there is concern that adult sex ratios may be similarly skewed or will become so as a result of climate warming. prediction and mitigation of such impacts are difficult when life-histor ... | 2012 | 22591073 |
| mitochondrial dna str analysis as a tool for studying the green sea turtle (chelonia mydas) populations: the mediterranean sea case study. | the mediterranean population of the green sea turtle chelonia mydas is critically endangered. genetic analysis of this population using the ordinary haplotyping system, based on sequence analysis of a segment of the mitochondrial dna (mtdna) d-loop (control region), revealed very little variation. the most common haplotype, cm-a13, was observed in all but three individuals in hundreds of samples in previous studies. in search for a more informative marker we sequenced the 3' of the mitochondrial ... | 2012 | 22578655 |
| ultrastructural study of the spermatozoon of the digenean enodiotrema reductum looss, 1901 (platyhelminthes, plagiorchioidea, plagiorchiidae), parasite of the green turtle chelonia mydas (linnaeus, 1758) in senegal. | this study describes the ultrastructural organisation of the spermatozoon of a digenean enodiotrema reductum (pligiorchiida: plagiorchiidae) from the green turtle chelonia mydas (linnaeus, 1758). this is the first report of e. reductum from senegal. the mature spermatozoon of e. reductum is filiform and exhibits two axonemes of the 9 + "1" pattern of the trepaxonemata, a nucleus, parallel cortical microtubules, an extramembranar ornamentation associated with spine-like bodies and granules of gly ... | 2012 | 22488200 |
| mercury in the sea turtle chelonia mydas (linnaeus, 1958) from ceará coast, ne brazil. | mercury concentrations in carapace fragments of the green turtle chelonia mydas from the ceará coast in ne brazil are reported. concentrations varied from <0.34 to 856.6 ng.g(-1) d.w., and were highest (average of 154.8 ng.g(-1) d.w.) in juveniles (n = 22), whereas lowest concentrations (average of 2.5 ng.g(-1) d.w.) were observed in adult/sub-adult animals (n = 3). there was a significant negative correlation between animal size and hg concentration probably due to different diets between juven ... | 2012 | 22441601 |
| mitogenomic sequences better resolve stock structure of southern greater caribbean green turtle rookeries. | analyses of mitochondrial control region polymorphisms have supported the presence of several demographically independent green turtle (chelonia mydas) rookeries in the greater caribbean region. however, extensive sharing of common haplotypes based on 490-bp control region sequences confounds assessment of the scale of natal homing and population structure among regional rookeries. we screened the majority of the mitochondrial genomes of 20 green turtles carrying the common haplotype cm-a5 and r ... | 2012 | 22432442 |
| first histological and virological report of fibropapilloma associated with herpesvirus in chelonia mydas at príncipe island, west africa. | marine turtle fibropapillomatosis is an emerging disease that affects marine turtles worldwide. this report describes the histopathological features and involvement of chelonid fibropapilloma-associated herpesvirus in marine turtle fibropapillomatosis detected in the green turtle chelonia mydas at príncipe island, gulf of guinea. the histopathological findings confirmed the presence of fibropapillomas with both verrucous and fibromatous subtypes. quantitative real-time pcr was used for detection ... | 2012 | 22411101 |
| multiple distant origins for green sea turtles aggregating off gorgona island in the colombian eastern pacific. | mitochondrial dna analyses have been useful for resolving maternal lineages and migratory behavior to foraging grounds (fg) in sea turtles. however, little is known about source rookeries and haplotype composition of foraging green turtle aggregations in the southeastern pacific. we used mitochondrial dna control region sequences to identify the haplotype composition of 55 green turtles, chelonia mydas, captured in foraging grounds of gorgona national park in the colombian pacific. amplified fra ... | 2012 | 22319635 |
| turtle mating patterns buffer against disruptive effects of climate change. | for organisms with temperature-dependent sex determination (tsd), skewed offspring sex ratios are common. however, climate warming poses the unique threat of producing extreme sex ratio biases that could ultimately lead to population extinctions. in marine turtles, highly female-skewed hatchling sex ratios already occur and predicted increases in global temperatures are expected to exacerbate this trend, unless species can adapt. however, it is not known whether offspring sex ratios persist into ... | 2012 | 22279164 |
| identification of five reptile egg whites protein using maldi-tof mass spectrometry and lc/ms-ms analysis. | proteomics of egg white proteins of five reptile species, namely siamese crocodile (crocodylus siamensis), soft-shelled turtle (trionyx sinensis taiwanese), red-eared slider turtle (trachemys scripta elegans), hawksbill turtle (eretmochelys imbricate) and green turtle (chelonia mydas) were studied by 2d-page using ipg strip ph 4-7 size 7 cm and ipg strip ph 3-10 size 24 cm. the protein spots in the egg white of the five reptile species were identified by maldi-tof mass spectrometry and lc/ms-ms ... | 2012 | 22266102 |
| trace metals in an urbanized estuarine sea turtle food web in san diego bay, ca. | san diego bay is an anthropogenically impacted waterway that is also a critical habitat for many sensitive species such as the green sea turtle (chelonia mydas). in this study, we quantified trace metal concentrations in sediment and organisms composing the green sea turtle diet, and identified bioaccumulation patterns for a suite of trace metals. we found ag, cd, cu, mn, se, and zn exhibited the highest bioaccumulation levels in this food web. cu and mn concentrations in resident biota displaye ... | 2012 | 22261404 |
| presence of chelonid fibropapilloma-associated herpesvirus in tumored and non-tumored green turtles, as detected by polymerase chain reaction, in endemic and non-endemic aggregations, puerto rico. | fibropapillomatosis (fp), a transmissible neoplastic disease of marine turtles characterized by a likely herpesviral primary etiology, has emerged as an important disease in green sea turtles (chelonia mydas) over the past three decades. the objectives of this study were to determine the suitability of three different chelonid fibropapilloma-associated herpesvirus (cfphv) gene targets in polymerase chain reaction (pcr) assays of affected tissues; to explore the presence of cfphv in non-affected ... | 2012 | 23961364 |
| energy expenditure of freely swimming adult green turtles (chelonia mydas) and its link with body acceleration. | marine turtles are globally threatened. crucial for the conservation of these large ectotherms is a detailed knowledge of their energy relationships, especially their at-sea metabolic rates, which will ultimately define population structure and size. measuring metabolic rates in free-ranging aquatic animals, however, remains a challenge. hence, it is not surprising that for most marine turtle species we know little about the energetic requirements of adults at sea. recently, accelerometry has em ... | 2011 | 22071193 |
| the role of geomagnetic cues in green turtle open sea navigation. | laboratory and field experiments have provided evidence that sea turtles use geomagnetic cues to navigate in the open sea. for instance, green turtles (chelonia mydas) displaced 100 km away from their nesting site were impaired in returning home when carrying a strong magnet glued on the head. however, the actual role of geomagnetic cues remains unclear, since magnetically treated green turtles can perform large scale (>2000 km) post-nesting migrations no differently from controls. | 2011 | 22046329 |
| fine-scale thermal adaptation in a green turtle nesting population. | the effect of climate warming on the reproductive success of ectothermic animals is currently a subject of major conservation concern. however, for many threatened species, we still know surprisingly little about the extent of naturally occurring adaptive variation in heat-tolerance. here, we show that the thermal tolerances of green turtle (chelonia mydas) embryos in a single, island-breeding population have diverged in response to the contrasting incubation temperatures of nesting beaches just ... | 2012 | 21937495 |
| the effects of feeding on hematological and plasma biochemical profiles in green (chelonia mydas) and kemp's ridley (lepidochelys kempii) sea turtles. | in mammals, lipemic blood from sampling too soon after an animal feeds can have substantial effects on biochemical values. plasma biochemical values in reptiles may be affected by species, age, season, and nutritional state. however, fasting status is not routinely considered when sampling reptile blood. in this paper, we evaluated 2-hour postprandial blood collection in two sea turtle species to investigate the effects of feeding on hematological and plasma biochemical values. feeding had no si ... | 2011 | 21776356 |
| pollutants and the health of green sea turtles resident to an urbanized estuary in san diego, ca. | rapid expansion of coastal anthropogenic development means that critical foraging and developmental habitats often occur near highly polluted and urbanized environments. although coastal contamination is widespread, the impact this has on long-lived vertebrates like the green turtle (chelonia mydas) is unclear because traditional experimental methods cannot be applied. we coupled minimally invasive sampling techniques with health assessments to quantify contaminant patterns in a population of gr ... | 2011 | 21549409 |
| rate of egg maturation in marine turtles exhibits 'universal temperature dependence'. | 1. the metabolic theory of ecology (mte) predicts that, after correcting for body mass variation among organisms, the rates of most biological processes will vary as a universal function of temperature. however, empirical support for 'universal temperature dependence' (utd) is currently equivocal and based on studies of a limited number of traits. 2. in many ectothermic animals, the rate at which females produce mature eggs is temperature dependent and may be an important factor in determining t ... | 2011 | 21517842 |
| coastal habitat degradation and green sea turtle diets in southeastern brazil. | to show the influence of coastal habitat degradation on the availability of food for green turtles (chelonia mydas), we assessed the dietary preferences and macroalgae community at a feeding area in a highly urbanized region. the area showed low species richness and was classified as degraded. we examined stomach contents of 15 dead stranded turtles (ccl=44.0cm (sd 6.7cm)). the diet was composed primarily of green algae ulva spp. (83.6%). in contrast, the macroalgae community was dominated by th ... | 2011 | 21450314 |
| oxidative stress indicators and chemical contaminants in east pacific green turtles (chelonia mydas) inhabiting two foraging coastal lagoons in the baja california peninsula. | in order to determine the potential effects of contaminants in juveniles of east pacific green turtle, chelonia mydas, captured alive, circulating trace metal and organochlorine pesticide concentrations were correlated with body condition, antioxidant enzyme activities and lipid peroxidation levels. turtles were sampled in punta abreojos (pao) and bahía magdalena (bma). turtles from pao showed higher silicon and cadmium concentrations, but lower α-hexachlorocyclohexane, γ-hexachlorocyclohexane, ... | 2011 | 21377544 |
| detection of low plasma estradiol concentrations in nesting green turtles (chelonia mydas) by hplc/ms-ms. | in previous studies on nesting green turtles under natural conditions from different geographical regions, 17-β-estradiol (e(2) ) was either undetectable or detected at very low levels. ria and other related techniques were not sensitive enough to measure low e(2) values in the green turtles. in this study, a sensitive method was used in detecting low hormone concentrations: high performance liquid chromatography with tandem quadruple mass spectrometry (hplc-ms/ms). using this technique, estradi ... | 2011 | 21370486 |
| [gonadic histology and phenotypical maturation criteria in the marine turtles chelonia mydas and eretmochelys imbricata (testudines: chelonidae) from cuba]. | gonad maturity is usually evaluated through macroscopic analysis of the gonads. in sea turtles, the maturation stages are associated with body size, depending on the studied marine stock. fishermen classify turtles bigger than 65.0 cm as sexually mature. if they have secondary sex characters they are recorded as breeding males. we compared body size with macroscopic and microscopic gonad characteristics in two cuban turtles. eighteen individuals of c. mydas and twenty of e. imbricata was obtaine ... | 2010 | 20411723 |
| health surveillance of stranded green turtles in southern queensland, australia (2006-2009): an epidemiological analysis of causes of disease and mortality. | causes of disease and mortality in marine turtles are frequently based on opportunistic investigations producing results that may not contribute to knowledge on how to protect their survival rate. over a 4-year period (2006-2009), the major causes of stranding and morbidity in 100 green turtles (chelonia mydas) from southern queensland on the east coast of australia were determined by comprehensive postmortem examination. lesions were characterized for analysis using descriptive and probability ... | 2010 | 20232226 |
| dna barcodes for globally threatened marine turtles: a registry approach to documenting biodiversity. | dna barcoding is a global initiative that provides a standardized and efficient tool to catalogue and inventory biodiversity, with significant conservation applications. despite progress across taxonomic realms, globally threatened marine turtles remain underrepresented in this effort. to obtain dna barcodes of marine turtles, we sequenced a segment of the cytochrome c oxidase subunit i (coi) gene from all seven species in the atlantic and pacific ocean basins (815 bp; n = 80). to further invest ... | 2010 | 21565020 |
| biochemical indices as correlates of recent growth in juvenile green turtles (chelonia mydas). | nucleic acid and protein concentrations and their ratios are increasingly used as correlates of nutritional condition and growth in marine species. however, their application in studies of reptile growth has not yet been validated. the green turtle (chelonia mydas) is an endangered marine reptile for which assessing population health requires knowledge of demographic parameters such as individual growth rates. the purpose of this study was to evaluate a number of biochemical indices ([dna], [rna ... | 2009 | 20161581 |
| organohalogen contaminants in blood of kemp's ridley (lepidochelys kempii) and green sea turtles (chelonia mydas) from the gulf of mexico. | the threat that exposure to organohalogen (oh) contaminants poses to endangered populations of kemp's ridley (lepidochelys kempii) and green sea turtles (chelonia mydas) is not well understood, partly because few oh data are available. blood samples from live juvenile and sub-adult l. kempii (n = 46) and c. mydas (n = 9) from the gulf of mexico and from l. kempii from the southeastern us coast (n = 3) were extracted using microwave-assisted extraction, and analyzed by large volume injection gas ... | 2010 | 20004460 |
| using blood samples to estimate persistent organic pollutants and metals in green sea turtles (chelonia mydas). | persistent organic pollutants (pops) and heavy metals have been reported in a number of green turtle (chelonia mydas) populations worldwide. however, due to ethical considerations, these studies have generally been on tissues from deceased and stranded animals. the purpose of this study was to investigate the use of blood samples to estimate the tissue contamination of live c. mydas populations. this study analysed 125 pop compounds and eight heavy metals in the blood, liver, kidney and muscle o ... | 2010 | 20004417 |
| compensatory responses to food restriction in juvenile green turtles (chelonia mydas). | the purpose of this study was to assess the compensatory responses to food restriction and subsequent increased food availability in juvenile green turtles (chelonia mydas). turtles were fed an ad libitum ration for 12 weeks (al), a restricted ration for 12 weeks (r), or a restricted ration for 5 weeks and an ad libitum ration for 7 weeks (r-al). analysis of covariance was used to test the relationships between (1) growth and body size, (2) intake and body size, and (3) growth and intake for eac ... | 2009 | 19769130 |
| development and application of biochemical and haematological reference intervals to identify unhealthy green sea turtles (chelonia mydas). | biochemical and haematological reference intervals (ris) have been reported for sea turtles, but their value for ante-mortem disease diagnosis may be limited due to small sample sizes and outdated statistical analyses. in the present study, 290 green sea turtles (chelonia mydas) were captured, clinically assessed and blood sampled. of these, 211 were classified as 'clinically healthy' and 25 as 'clinically unhealthy'. ris were estimated using data from the healthy turtles and compared with blood ... | 2010 | 19709912 |
| validation of the use of doubly labeled water for estimating metabolic rate in the green turtle (chelonia mydas l.): a word of caution. | marine turtles often have extremely high water turnover accompanied by a low field metabolic rate (fmr), a combination that can contraindicate the use of doubly labelled water (dlw). therefore, we conducted a validation study to assess the suitability of the dlw technique for determining fmr of marine turtles. six green turtles (22.42+/-3.13 kg) were injected with dlw and placed in a tank of seawater with a respirometer for continuous monitoring of oxygen consumption (mr) over a 5-day period. tr ... | 2009 | 19648409 |
| green turtles (chelonia mydas) foraging at arvoredo island in southern brazil: genetic characterization and mixed stock analysis through mtdna control region haplotypes. | we analyzed mtdna control region sequences of green turtles (chelonia mydas) from arvoredo island, a foraging ground in southern brazil, and identified eight haplotypes. of these, cm-a8 (64%) and cm-a5 (22%) were dominant, the remainder presenting low frequencies (< 5%). haplotype (h) and nucleotide (π) diversities were 0.5570 ± 0.0697 and 0.0021 ± 0.0016, respectively. exact tests of differentiation and amova φ(st) pairwise values between the study area and eight other atlantic foraging grounds ... | 2009 | 21637527 |
| identification of cd3+ t lymphocytes in the green turtle chelonia mydas. | to understand the role of the immune system with respect to disease in reptiles, there is the need to develop tools to assess the host's immune response. an important tool is the development of molecular markers to identify immune cells, and these are limited for reptiles. we developed a technique for the cryopreservation of peripheral blood mononuclear cells and showed that a commercially available anti-cd3 epsilon chain antibody detects a subpopulation of cd3 positive peripheral blood lymphocy ... | 2009 | 19477530 |
| characterization of single nucleotide polymorphism markers for the green sea turtle (chelonia mydas). | we present data on 29 new single nucleotide polymorphism assays for the green sea turtle, chelonia mydas. dna extracts from 39 green turtles were used for two methods of single nucleotide polymorphism discovery. the first approach employed an amplified fragment length polymorphism technique. the second technique screened a microsatellite library. allele-specific amplification assays were developed for high-throughput single nucleotide polymorphism genotyping and tested on two pacific c. mydas ne ... | 2009 | 21564838 |
| morbidity in a juvenile green sea turtle (chelonia mydas) due to ocean-borne plastic. | an emaciated 2.36-kg juvenile green sea turtle, chelonia mydas, was found floating off of melbourne beach, florida, usa (28 degrees 2'4"n, 80 degrees 32'32"w). the turtle exhibited signs of cachexia, positive buoyancy, lethargy, and obstipation; was covered with barnacles; and was anorexic at the time of presentation. dorsal-ventral radiographs with positive contrast confirmed obstruction of the gastrointestinal tract. serum chemistry abnormalities reflected metabolic/nutritional deficiencies. g ... | 2009 | 19368262 |
| the effect of organochlorines and heavy metals on sex steroid-binding proteins in vitro in the plasma of nesting green turtles, chelonia mydas. | in this study on green turtles, chelonia mydas, from peninsular malaysia, the effect of selected environmental toxicants was examined in vitro. emphasis was placed on purported hormone-mimicking chemicals such as dichlorodiphenyltrichloroethane (ddt), dichlorodiphenyldichloroethylene, dieldrin, lead, zinc and copper. five concentrations were used: high (1 mg/l), medium (10(-1) mg/l), low (10(-2) mg/l), very low (10(-6) mg/l) and control (diluted carrier solvent but no toxicants). the results sug ... | 2009 | 19247670 |
| analysing persistent organic pollutants in eggs, blood and tissue of the green sea turtle (chelonia mydas) using gas chromatography with tandem mass spectrometry (gc-ms/ms). | investigation into persistent organic pollutants (pops) in sea turtles is an important area of conservation research due to the harmful effects of these chemicals. however, the analysis of pops in the green sea turtle (chelonia mydas) has been limited by methods with relatively high limits of detection and high costs associated with multiple sample injections into complex arrangements of analytical equipment. the present study aimed to develop a method that could detect a large number of pops in ... | 2009 | 19183966 |
| ultrastructural features and elemental distribution in eggshell during pre and post hatching periods in the green turtle, chelonia mydas at ras al-hadd, oman. | eggshells were randomly collected from turtle nests immediately after oviposition and at the end of incubation to examine the ultrastructural features using scanning jsm-5600lv microscopy. three layers were recognized; an outer calcareous, a middle multistrata and an inner membrane. the calcareous layer had loose nodular units varying in shape and size without interlocking attachments. in freshly laid eggs, each nodular unit had spicules arranged in folded stacks. the spicules became unfolded du ... | 2009 | 19131082 |
| characterization of polymorphic microsatellite markers for the green turtle (chelonia mydas). | we describe primers and polymerase chain reaction conditions to amplify 12 microsatellite loci from the green turtle (chelonia mydas), including one dinucleotide, four trinucleotide and seven tetranucleotide loci. the primers were tested on 78 individuals from a pacific population nesting in the hawaiian islands. the primer pairs developed in this study yielded an average of 8.33 alleles per locus (range of 3-15 alleles), an average observed heterozygosity of 0.668 (range 0.309-0.910), and an av ... | 2009 | 21564648 |
| towards a predictive framework for predator risk effects: the interaction of landscape features and prey escape tactics. | 1. risk effects of predators can profoundly affect community dynamics, but the nature of these effects is context dependent. 2. although context dependence has hindered the development of a general framework for predicting the nature and extent of risk effects, recent studies suggest that such a framework is attainable if the factors that shape anti-predator behaviour, and its effectiveness, in natural communities are well understood. 3. one of these factors, the interaction of prey escape tacti ... | 2009 | 19076259 |
| aflp fragment isolation technique as a method to produce random sequences for single nucleotide polymorphism discovery in the green turtle, chelonia mydas. | the green sea turtle, chelonia mydas, was used as a case study for single nucleotide polymorphism (snp) discovery in a species that has little genetic sequence information available. as green turtles have a complex population structure, additional nuclear markers other than microsatellites could add to our understanding of their complex life history. amplified fragment length polymorphism technique was used to generate sets of random fragments of genomic dna, which were then electrophoretically ... | 2009 | 19074754 |
| sex steroid binding proteins in the plasma of hatchling chelonia mydas. | sex steroid binding proteins were identified in hatchling female and male chelonia mydas by dialysis and steady-state gel electrophoresis when examined at 4 degrees c. a testosterone binding protein with high binding affinity (k (a) = 0.98 +/- 0.5 x 10(8) m(-1)) and low to moderate binding capacity (b (max) = 7.58 +/- 4.2 x 10(-5) m) was observed in male hatchlings. an oestradiol binding protein with high affinity (k (a) = 0.35 +/- 1.8 x 10(8) m(-1)) and low to moderate binding capacity (b (max) ... | 2008 | 18488235 |
| annual variation in source contributions to a mixed stock: implications for quantifying connectivity. | connectivity among populations of highly migratory species is an area of active research and is often quantified with genetic markers. we determined mitochondrial dna (mtdna) sequences in 350 green turtles, chelonia mydas, in 10 annual samples over a 12-year period from an aggregation of immature green turtles in the southern bahamas. we found significant temporal structuring in haplotype frequencies among years for all turtles and for recruits. these significant differences were reflected in su ... | 2008 | 18373532 |
| arsenic species and their accumulation features in green turtles (chelonia mydas). | total arsenic (as) and its compounds were determined in liver, kidney, muscle, and stomach contents of green turtles (chelonia mydas). total as concentrations in the muscle were higher than those in the kidney and liver. arsenobetaine (ab) was the predominant compound in all the three tissues and its levels were positively correlated with total as concentrations. this indicates that ab greatly contributes to as accumulation in green turtles. higher concentrations of remaining as in the sample af ... | 2008 | 18291422 |
| growth-related changes in histology and immunolocalization of steroid hormone receptors in gonads of the immature male green turtle (chelonia mydas). | studies on the population dynamics of sea turtles require histological evaluation of the ontogenetic development and the activity of the gonads for reproduction. to investigate the growth-related changes of gonads in the immature male green turtle (chelonia mydas), the histological changes of testes and epididymides and the localization of the androgen receptor, estrogen receptor alpha, estrogen receptor beta, and progesterone receptor were examined. the testes were categorized histologically in ... | 2008 | 18273884 |
| the influence of diet on fatty acids in the egg yolk of green sea turtles, chelonia mydas. | fatty acid concentrations found in the yolk of green sea turtles reflect differences in the diet of the mothers. all of the 12 fatty acids measured in yolk samples were significantly different between eggs produced from the pellet and wild-type diets. however, the relative pattern of yolk fatty acids in the green turtle mirrored those of other reptiles. yolk samples contained mostly (63-67%) 14:0. 16:0, 16:1n-7 and 18:1n-9. yolks from captive animals on pellet diet contained an additional 17.64% ... | 2008 | 18185934 |
| non-migratory breeding by isolated green sea turtles (chelonia mydas) in the indian ocean: biological and conservation implications. | green sea turtles (chelonia mydas) are renowned for their long-distance migrations but have less fame for short-distance migrations or non-migratory behavior. we present satellite telemetric evidence from cocos (keeling) islands, indian ocean for the first predominantly non-migratory green sea turtle (c. mydas) population. the mean migration distance from the nesting beach to the foraging grounds was 35.5 km with a maximum mean transit time of 3.4 days. the behavior of this population has major ... | 2008 | 18046497 |
| changes in plasma levels of adrenaline, noradrenaline, glucose, lactate and co2 in the green turtle, chelonia mydas, during peak period of nesting. | plasma concentrations of stress hormones [adrenaline (adr), noradrenaline (nr)], lactate, glucose and co2 were monitored during peak nesting period (may-october) at different phases of nesting in the green turtle, chelonia mydas. these include, emergence from sea, excavating body and nest chambers, oviposition, covering and camouflaging the nest and then returning to sea. turtles that completed all phases of nesting including oviposition before returning to sea were considered "successful" turtl ... | 2008 | 17981280 |
| the 'lost years' of green turtles: using stable isotopes to study cryptic lifestages. | ignorance of the location or inaccessible locations of lifestages can impede the study and management of species. we used stable isotopes of carbon and nitrogen to identify the habitats and diets and to estimate the duration of a 'missing' lifestage: the early juvenile stage of the green turtle, chelonia mydas. stable isotopes in scute from young herbivorous green turtles in shallow-water habitats revealed that they spend 3-5 years as carnivores in oceanic habitats before making a rapid ontogene ... | 2007 | 17878144 |
| state-dependent risk-taking by green sea turtles mediates top-down effects of tiger shark intimidation in a marine ecosystem. | 1. a predictive framework of community and ecosystem dynamics that applies across systems has remained elusive, in part because non-consumptive predator effects are often ignored. further, it is unclear how much individual-level detail community models must include. 2. previous studies of short-lived species suggest that state-dependent decisions add little to our understanding of community dynamics. body condition-dependent decisions made by long-lived herbivores under risk of predation, howeve ... | 2007 | 17714261 |
| total and subcellular distribution of trace elements (cd, cu and zn) in the liver and kidney of green turtles (chelonia mydas) from the mediterranean sea. | this study investigated the subcellular distribution of cd, cu and zn in liver and kidney of green turtles (chelonia mydas) stranded along the italian coast of the south adriatic sea (eastern mediterranean). cd and zn mean concentrations did not differ significantly between liver (4.26microgg(-1) and 34.53microgg(-1), respectively) and kidney (5.06microgg(-1) and 26.39microgg(-1), respectively), whereas the levels of cu were significantly higher in liver (32.75microgg(-1)) than in kidney (8.20mi ... | 2008 | 17707456 |
| incorporating multiple mixed stocks in mixed stock analysis: 'many-to-many' analyses. | traditional mixed stock analyses use morphological, chemical, or genetic markers measured in several source populations and in a single mixed population to estimate the proportional contribution of each source to the mixed population. in many systems, however, different individuals from a particular source population may go to a variety of mixed populations. now that data are becoming available from (meta)populations with multiple mixed stocks, the need arises to estimate contributions in this ' ... | 2007 | 17284204 |
| marine turtles use geomagnetic cues during open-sea homing. | marine turtles are renowned long-distance navigators, able to reach remote targets in the oceanic environment; yet the sensory cues and navigational mechanisms they employ remain unclear [1, 3]. recent arena experiments indicated an involvement of magnetic cues in juvenile turtles' homing ability after simulated displacements [4, 5], but the actual role of geomagnetic information in guiding turtles navigating in their natural environment has remained beyond the reach of experimental investigatio ... | 2007 | 17240337 |
| rameshwarotrema uterocrescens trematode parasitism of the oesophageal glands in green sea turtles (chelonia mydas). | | 2007 | 17220526 |
| phylogeography of the green turtle, chelonia mydas, in the southwest indian ocean. | patterns of mitochondrial dna (mtdna) variation were used to analyse the population genetic structure of southwestern indian ocean green turtle (chelonia mydas) populations. analysis of sequence variation over 396 bp of the mtdna control region revealed seven haplotypes among 288 individuals from 10 nesting sites in the southwest indian ocean. this is the first time that atlantic ocean haplotypes have been recorded among any indo-pacific nesting populations. previous studies indicated that the c ... | 2007 | 17181729 |
| pathology of oropharyngeal fibropapillomatosis in green turtles chelonia mydas. | complete gross and histopathologic examinations of the oral cavity, tongue, pharynx, larynx, and glottis were performed in five hawaiian green turtles chelonia mydas with fibropapillomatosis. these examinations demonstrated that the oropharyngeal fibropapillomas were similar to characteristic external fibropapillomas previously described for green turtles. the size, appearance, and anatomic site of the tumors confirmed that these turtles presented total or partial occlusion of the nasopharynx, g ... | 2006 | 26599046 |
| plasma hormone levels in the green turtles chelonia mydas during peak period of nesting at ras al-hadd-oman. | circulating estradiol (e(2)), progesterone (pro), testosterone, and corticosterone (b) levels were monitored in the green turtles chelonia mydas during different nesting phases. successful nesting includes emergence from sea, chamber and nest excavation, oviposition, burying the nest, and returning to sea. unsuccessful nesting includes chamber and nest excavations but without oviposition. blood samples were taken from the cervical sinus and collected within 5-min of capture to minimize stress. t ... | 2006 | 17065384 |
| the genetic structure of australasian green turtles (chelonia mydas): exploring the geographical scale of genetic exchange. | ecological and genetic studies of marine turtles generally support the hypothesis of natal homing, but leave open the question of the geographical scale of genetic exchange and the capacity of turtles to shift breeding sites. here we combine analyses of mitochondrial dna (mtdna) variation and recapture data to assess the geographical scale of individual breeding populations and the distribution of such populations through australasia. we conducted multiscale assessments of mtdna variation among ... | 2006 | 17054494 |
| the complete amino acid sequence of green turtle (chelonia mydas) egg white ribonuclease. | egg white ribonuclease was first found in green turtle eggs. this enzyme has been purified by cm-toyopearl cation exchange. two isoforms (gtrnase-1 and gtrnase-2) were further separated by rp-hplc, with the same m.w. (13 kda) and activity. these isoforms carried one amino acid exchange of ser and leu at the position 37. the n-terminal sequence, etryekf, was determined for the transblotted protein. internal sequences were analyzed by protein sequencer and esi-q-tof mass spectrometry for tryptic p ... | 2006 | 16947078 |
| identification and properties of steroid-binding proteins in nesting chelonia mydas plasma. | we report for the first time the presence of a sex steroid-binding protein in the plasma of green sea turtles chelonia mydas, which provides an insight into reproductive status. a high affinity, low capacity sex hormone steroid-binding protein was identified in nesting c. mydas and its thermal profile was established. in nesting c. mydas testosterone and oestradiol bind at 4 degrees c with high affinity (k (a) = 1.49 +/- 0.09 x 10(9) m(-1); 0.17 +/- 0.02 x 10(7) m(-1)) and low binding capacity ( ... | 2006 | 16841212 |
| good news for sea turtles. | following the overexploitation of sea turtle populations, conservation measures are now in place in many areas. however, the overall impact of these measures is often unknown because there are few long time-series showing trends in population sizes. in a recent paper, george balazs and milani chaloupka chart the number of green turtles chelonia mydas nesting in hawaii over the past 30 years and reveal a remarkably quick increase in the size of this population following the instigation of conserv ... | 2004 | 16701283 |
| levels of trace elements in green turtle eggs collected from hong kong: evidence of risks due to selenium and nickel. | concentrations of 22 trace elements were determined in green turtle (chelonia mydas) eggs collected from hong kong. concentrations of selenium, lead and nickel in these eggs were generally higher than those reported in other studies. the predicted no effect concentrations (pnec; ng/g wet weight) of pb (1000), se (340 and 6000 for the worst-case and best-case scenarios, respectively) and ni (17) in the green turtle eggs were estimated. hazard quotients (hqs) estimate that se (hqs: 0.2-24.5) and n ... | 2006 | 16616401 |
| depot fatty acid composition in immature green turtles (chelonia mydas) residing at two near-shore foraging areas in the hawaiian islands. | the lipid content and fatty acid composition of depot fat were determined for 58 immature green turtles (chelonia mydas) residing at two near-shore foraging areas, ahu-o-laka, located in kaneohe bay on oahu, and kiholo bay located on the island of hawaii. benthic flora at kiholo was limited to a single algal species but included algae and seagrass at ahu-o-laka. turtle straight carapace length ranged from 38.6 to 59.2 cm, suggesting that the sample set included new recruits to up to 12-year resi ... | 2005 | 15649765 |
| retrospective pathology survey of green turtles chelonia mydas with fibropapillomatosis in the hawaiian islands, 1993--2003. | we necropsied 255 stranded green turtles chelonia mydas with fibropapillomatosis (fp) from the hawaiian islands, north pacific, from august 1993 through may 2003. of these, 214 (84 %) were euthanized due to advanced fp and the remainder were found dead in fresh condition. turtles were assigned a standardized tumor severity score ranging from 1 (lightly tumored) to 3 (heavily tumored). tumors were counted and measured and categorized as external, oral, or internal and tissues evaluated by light m ... | 2004 | 15648843 |
| evaluation of magnetic resonance imaging for detection of internal tumors in green turtles with cutaneous fibropapillomatosis. | to describe the gross cross-sectional anatomy of green turtles (chelonia mydas) and evaluate magnetic resonance imaging (mri) for detection of internal tumors in green turtles with cutaneous fibropapillomatosis. | 2004 | 15552321 |
| global population genetic structure and male-mediated gene flow in the green sea turtle (chelonia mydas): analysis of microsatellite loci. | we assessed the degree of population subdivision among global populations of green sea turtles, chelonia mydas, using four microsatellite loci. previously, a single-copy nuclear dna study indicated significant male-mediated gene flow among populations alternately fixed for different mitochondrial dna haplotypes and that genetic divergence between populations in the atlantic and pacific oceans was more common than subdivisions among populations within ocean basins. even so, overall levels of vari ... | 2004 | 15126404 |
| animal behaviour: geomagnetic map used in sea-turtle navigation. | migratory animals capable of navigating to a specific destination, and of compensating for an artificial displacement into unfamiliar territory, are thought to have a compass for maintaining their direction of travel and a map sense that enables them to know their location relative to their destination. compasses are based on environmental cues such as the stars, the sun, skylight polarization and magnetism, but little is known about the sensory mechanism responsible for the map sense. here we s ... | 2004 | 15118716 |
| trace element residues in tissues of green turtles (chelonia mydas) from south china waters. | | 2004 | 14725889 |
| island-finding ability of marine turtles. | green turtles (chelonia mydas) swim from foraging grounds along the brazilian coast to ascension island to nest, over 2200 km distant in the middle of the equatorial atlantic. to test the hypothesis that turtles use wind-borne cues to locate ascension island we found turtles that had just completed nesting and then moved three individuals 50 km northwest (downwind) of the island and three individuals 50 km southeast (upwind). their subsequent movements were tracked by satellite. turtles released ... | 2003 | 12952621 |
| altered in vitro immune responses in green turtles (chelonia mydas) with fibropapillomatosis. | the immune competence of green sea turtles (chelonia mydas) with fibropapillomatosis was assessed using in vitro techniques to measure lymphocyte proliferation in response to mitogens. in comparison with captive, healthy green sea turtles, those afflicted with fibropapillomas demonstrated diminished proliferation with concanavalin a, phytohemagglutinin (t-cell mitogens), and lipopolysaccharide (b-cell mitogen). also, markedly decreased proliferative responses to the lymphocyte polyclonal stimula ... | 2001 | 12785698 |
| seasonal variation in plasma catecholamines and adipose tissue lipolysis in adult female green sea turtles (chelonia mydas). | we investigated three aspects of potential interrenal regulation of reproduction in female green sea turtles, chelonia mydas. first, seasonal trends in plasma catecholamines were examined from female c. mydas at different stages of their reproductive cycles. second, variation in catecholamine levels during a nesting season were analysed in relation to restraint time, and ecological variables such as nesting habitat, body size, and reproductive investment. third, catecholamine and corticosterone ... | 2003 | 12606273 |
| [identification of turtle shell, tortoise plastron and their counterfeit products]. | to identify the commercial chinese medicines turtle shell and tortoise plastron. | 2000 | 12512444 |
| patterns of lipid storage and mobilisation in the female green sea turtle ( chelonia mydas). | reproductive data from southern queensland indicate that vitellogenesis in female chelonia mydas takes approximately 8 months and is followed by a migration to a breeding area. at heron island, females lay multiple clutches over approximately 3 months. to investigate how females mobilise and store lipid during the breeding season we collected plasma, yolk, and fat tissue samples from females at a variety of stages during the nesting season. in breeding females, concentrations of plasma triglycer ... | 2002 | 12192510 |
| nocturnal activity in the green sea turtle alters daily profiles of melatonin and corticosterone. | in nature, green turtles (chelonia mydas) can exhibit nocturnal activity in addition to their typically diurnal activity cycle. we examined whether nocturnal activity in captive and free-living green turtles altered daily plasma profiles of melatonin (mel) and corticosterone (cort). in captivity, diurnally active green turtles expressed distinct diel cycles in mel and cort; a nocturnal rise was observed in mel and a diurnal rise was observed in cort. however, when induced to perform both low- an ... | 2002 | 12018931 |
| dynamic endocrine responses to stress: evidence for energetic constraints and status dependence in breeding male green turtles. | during reproduction, male vertebrates may exhibit a continuum of interactions between sex and adrenal steroids during stressful events, the outcome of which may be important in either reducing or promoting male reproductive success. we studied adult male green turtles (chelonia mydas) to examine if they altered plasma corticosterone (cort) and androgen levels in response to a standardized capture/restraint stressor as potential mechanisms to maintain reproductive activity during stressful events ... | 2002 | 11944967 |
| congener-specific profile and toxicity assessment of pcbs in green turtles (chelonia mydas) from the hawaiian islands. | chemical pollution may play a role in the etiology of fibropapillomatosis in green turtles (chelonia mydas). in this preliminary study, polychlorinated biphenyls (pcbs) were measured in the livers and adipose fats of green turtles collected after they were stranded on oahu island, hawaii in 1992-1993. average concentrations of total pcbs were 45-58 ng/g dry weight and 73-665 ng/g in the liver and adipose tissues, respectively. hexachlorobiphenyls were predominant homologues, pcbs 153 and 138 wer ... | 2001 | 11778957 |
| trace element accumulation in hawksbill turtles (eretmochelys imbricata) and green turtles (chelonia mydas) from yaeyama islands, japan. | concentrations of 18 trace elements (v, cr, mn, co, cu, zn, se, rb, sr, zr, mo, ag, cd, sb, ba, hg, tl, and pb) were determined in the liver, kidney, and muscle of green turtles (chelonia mydas) and hawksbill turtles (eretmochelys imbricata) from yaeyama islands, okinawa, japan. accumulation features of trace elements in the three tissues were similar between green and hawksbill turtles. no gender differences in trace element accumulation in liver and kidney were found for most of the elements. ... | 2001 | 11764164 |
| differential gene expression associated with tumorigenicity of cultured green turtle fibropapilloma-derived fibroblasts. | fibroblast cell lines derived from normal skin and experimentally induced fibropapillomas of green turtles (chelonia mydas), were propagated in vitro and tested for tumorigenicity in immunodeficient mice. differential display rt-pcr was used to identify differences in messenger rna expression between normal and tumorigenic fibropapillomatosis (fp)-derived fibroblasts from the same individual. four unique products that were apparently overexpresed in fp and three that were apparently underexpress ... | 2001 | 11520563 |
| immune status of free-ranging green turtles with fibropapillomatosis from hawaii. | cell-mediated and humoral immune status of free-ranging green turtles (chelonia mydas) in hawaii (usa) with and without fibropapillornatosis (fp) were assessed. tumored and non-tumored turtles from kaneohe bay (kb) on the island of oahu and from fp-free areas on the west (kona/kohala) coast of the island of hawaii were sampled from april 1998 through february 1999. turtles on oahu were grouped (0-3) for severity of tumors with 0 for absence of tumors, 1 for light, 2 for moderate, and 3 for most ... | 2001 | 11504232 |
| anthropogenic and natural organohalogen compounds in blubber of dolphins and dugongs (dugong dugon) from northeastern australia. | a range of organohalogen compounds (10 polychlorinated biphenyl [pcb] congeners, ddt and metabolites, chlordane-related compounds, the potential natural organochlorine compound q1, toxaphene, hexachlorobenzene, hexachlorocyclohexanes, dieldrin, and several yet unidentified brominated compounds) were detected in the blubber of four bottlenose dolphins (tursiops truncatus), one common dolphin (delphinus delphis), and seven dugongs (dugong dugon), as well as in adipose tissue of a green turtle (che ... | 2001 | 11462147 |
| the ontogeny of pulmonary surfactant secretion in the embryonic green sea turtle (chelonia mydas). | pulmonary surfactant, consisting predominantly of phosphatidylcholine (pc), is secreted from type ii cells into the lungs of all air-breathing vertebrates, where it functions to reduce surface tension. in mammals, glucocorticoids and thyroid hormones contribute to the maturation of the surfactant system. it is possible that phylogeny, lung structure, and the environment may influence the development of the surfactant system. here, we investigate the ontogeny of pc secretion from cocultured type ... | 2013 | 11436133 |
| development of the pulmonary surfactant system in the green sea turtle, chelonia mydas. | this study describes the developmental changes in pulmonary surfactant (ps) lipids throughout incubation in the sea turtle, chelonia mydas. total phospholipid (pl), disaturated phospholipid (dsp) and cholesterol (chol) harvested from lung washings increased with advancing incubation, where secretion was maximal at pipping, coincident with the onset of pulmonary ventilation. the dsp/pl ratio increased, whereas the chol/pl and the chol/dsp ratio declined throughout development. the phospholipids, ... | 2001 | 11311312 |
| metabolic heating and the prediction of sex ratios for green turtles (chelonia mydas). | we compared incubation temperatures in nests (n=32) of the green turtle (chelonia mydas) on ascension island in relation to sand temperatures of control sites at nest depth. intrabeach thermal variation was low, whereas interbeach thermal variation was high in both control and nest sites. a marked rise in temperature was recorded in nests from 30% to 40% of the way through the incubation period and attributed to metabolic heating. over the entire incubation period, metabolic heating accounted fo ... | 2008 | 11247735 |
| influence of diminished respiratory surface area on survival of sea turtle embryos. | it has been suggested that fungal presence on sea turtle eggs may impede gas exchange. to investigate the influence of diminished gas exchange surface upon embryo survivorship, flatback (natator depressus) and green (chelonia mydas) eggs were painted with petroleum jelly. variable proportions of the egg surface were covered, including both respiratory and nonrespiratory domains. embryo survival varied with site inhibited, proportion of eggshell affected, and species of turtle. if fungi on the ex ... | 2001 | 11241402 |
| salt gland blood flow in the hatchling green turtle, chelonia mydas. | microsphere and morphometric techniques were used to investigate any circulatory changes that accompany secretion by the salt glands of hatchling chelonia mydas. salt glands were activated by a salt load of 27.0 mmol nacl x kg body mass (bm)(-1), resulting in a mean sodium secretion rate of 4.14 +/- 0.11 mmol na x kg bm(-1) x h(-1) for a single gland. microsphere entrapment was approximately 160-180 times greater in the active salt gland than the inactive gland, inferring a similar change in blo ... | 2000 | 11192263 |
| phylogeography of colonially nesting seabirds, with special reference to global matrilineal patterns in the sooty tern (sterna fuscata). | sooty tern (sterna fuscata) rookeries are scattered throughout the tropical oceans. when not nesting, individuals wander great distances across open seas, but, like many other seabirds, they tend to be site-faithful to nesting locales in successive years. here we examine the matrilineal history of sooty terns on a global scale. assayed colonies within an ocean are poorly differentiated in mitochondrial dna sequence, a result indicating tight historical ties. however, a shallow genealogical parti ... | 2000 | 11091314 |
| intestinal volvulus and stricture associated with a leiomyoma in a green turtle (chelonia mydas). | a previously stranded 30-kg female green turtle (chelonia mydas) was referred to the veterinary medical teaching hospital at the university of florida following a 2-mo history of anorexia, intermittent regurgitation, decreased fecal production, and positive buoyancy of the right side. radiographs confirmed gaseous distension of bowel loops suggestive of intestinal obstruction. the coelom was surgically approached through a plastron osteotomy, and a 540 degrees volvulus of the small intestine was ... | 2000 | 10982137 |
| the diving behaviour of green turtles at ascension island. | for six green turtles, chelonia mydas, that had nested on ascension island in the south atlantic, we used time-depth recorders to examine their diving behaviour during the subsequent internesting interval (10-12 days). all the turtles performed dives where they remained at a fixed depth for a long period, surfaced briefly and then dived to the same depth again. it is generally believed these dive profiles are caused by the turtles resting on the sea bed. the maximum depth that turtles routinely ... | 2000 | 10715180 |
| identification of a small, naked virus in tumor-like aggregates in cell lines derived from a green turtle, chelonia mydas, with fibropapillomas. | serial cultivation of cell lines derived from lung, testis, periorbital and tumor tissues of a green turtle (chelonia mydas) with fibropapillomas resulted in the in vitro formation of tumor-like cell aggregates, ranging in size from 0.5 to 2.0 mm in diameter. successful induction of tumor-like aggregates was achieved in a cell line derived from lung tissue of healthy green turtles, following inoculation with cell-free media from these tumor-bearing cell lines, suggesting the presence of a transm ... | 2000 | 10713373 |
| biochemical responses to fibropapilloma and captivity in the green turtle. | blood biochemical parameters were compared for green turtles (chelonia mydas) with and without green turtle fibropapillomatosis (gtfp) from both captive and wild populations in hawaii (usa) and from a captive population from california (usa), during the period between 1994 and 1996. statistical analysis did not detect an influence of disease in any of the blood parameters for free-ranging turtles; however, captive turtles in hawaii with gtfp had significantly higher levels of alkaline phosphatas ... | 2000 | 10682751 |
| surgical repair of a depressed fracture in a green sea turtle, chelonia mydas. | sea turtles are considered to be endangered species. a depressed fracture of a 35 kg green sea turtle was treated surgically. isoflurane was used for induction and maintenance of anesthesia. slow induction of and slow recovery from anesthesia was remarkable. after the operation, there was an improvement of general status, but head tilt and weakness of the left limbs persisted. as the turtle did not eat, force feeding using stomach tube was performed. the turtle died at about 6 months after the s ... | 2000 | 10676899 |
| [seafood poisoning in madagascar: current state of knowledge and results of a retrospective study of the inhabitants of coastal villages]. | in 1996 and 1997, a knowledge, attitude and practice survey concerning seafood poisonings was conducted in 560 villages spread along the madagascar coasts, gathering 585,000 people. 175 serious and 205 mild seafood poisonings after fish, shark and turtle meals occured during the period 1930 to 1996. squales (mainly sphyrnidae and cacharinidae familiesi) are the most often responsible of serious poisoning (48% of episodes), then other fishes (37%), and mainly of the clupeidae family (herrings, sa ... | 2009 | 10623871 |
| relating tumor score to hematology in green turtles with fibropapillomatosis in hawaii. | the relationship between hematologic status and severity of tumor affliction in green turtles (chelonia mydas) with fibropapillomatosis (fp) was examined. during 1 wk periods in july 1997 and july 1998, we bled 108 free-ranging green turtles from pala'au (molokai, hawaii, usa) where fp is endemic. blood was analyzed for hematocrit, estimated total solids, total white blood cell (wbc) count and differential wbc count. each turtle was assigned a subjective tumor score ranging from 0 (no visible ex ... | 1999 | 10574546 |
| interactions between behavior and plasma steroids within the scramble mating system of the promiscuous green turtle, chelonia mydas. | we measured plasma androgen (combined testosterone and 5alpha-dihydrotestosterone) (a) and corticosterone (b) in the promiscuous green turtle (chelonia mydas) during courtship in the southern great barrier reef. this study examined if reproductive behaviors and intermale aggression induced behavioral androgen and adrenocortical responses in reproductively active male and female green turtles. associations between reproductive behavior and plasma steroids were investigated in green turtles across ... | 1999 | 10506533 |
| plasma steroid interactions during high-density green turtle nesting and associated disturbance. | raine island in the northern great barrier reef constitutes an extremely high-density green turtle (chelonia mydas) rookery. on this island, competitive interactions for nesting space and subsequent disturbance of individual nesting are widespread. high-density nesting often delays successful oviposition by one or more nights. there is little information on how hormones in female reptiles interact during competitive reproductive events in such high-density nesting populations. in this three-part ... | 1999 | 10375467 |
| [kap study (knowledge-attitude-practice) on seafood poisoning on the southwest coast of madagascar]. | in june and july 1996, a knowledge, attitude and practice survey concerning seafood poisonings was conducted in tuléar province, 41 villages spread along 300 km of cost, with some 34,000 inhabitants, were included in the survey. 84 seafood poisonings after fish, shark and turtle meals occurred during the period 1931 to 1995; 14 of them were responsible of deaths. the family of toxic fishes are clupeidae, tetraodontidae, scaridae and siganidae. sphyrna lewini is the shark species the most often r ... | 1999 | 10214522 |
| duodenal volvulus in free-living green turtles from coastal united arab emirates. | post-mortem examinations performed during may and august of 1997 on three free-living green turtles (chelonia mydas) in the united arab emirates revealed that all had stomachs full of fresh seagrass (approximately 99% of the total ingesta) and presented with a duodenal volvulus involving a length of approximately 100 cm. duodeni appeared empty and necrotic with diffuse purple-black mucosa. no apparent signs of obstruction by foreign objects, acute endoparasitism, or other disorders were observed ... | 1998 | 9813851 |
| thermal independence of muscle tissue metabolism in the leatherback turtle, dermochelys coriacea. | metabolic rates of animal tissues typically increase with increasing temperature and thermoregulatory control in an animal is a regional or whole body process. here we report that metabolic rates of isolated leatherback turtle (dermochelys coriacea) pectoralis muscle are independent of temperature from 5-38 degrees c (q10 = 1). conversely, metabolic rates of green turtle (chelonia mydas) pectoralis muscle exhibit a typical vertebrate response and increase with increasing temperature (q10 = 1.3-3 ... | 1998 | 9787823 |
| morphologic and cytochemical characteristics of blood cells from hawaiian green turtles. | to identify and characterize blood cells from free-ranging hawaiian green turtles, chelonia mydas. | 1998 | 9781457 |