| exposure to novel parainfluenza virus and clinical relevance in 2 bottlenose dolphin (tursiops truncatus) populations. | parainfluenza virus (piv) is a leading cause of respiratory infections in humans. a novel virus closely related to human and bovine parainfluenza viruses types 3 (hpiv-3 and bpiv-3), named tursiops truncatus parainfluenza virus type 1 (ttpiv-1), was isolated from a dolphin with respiratory disease. we developed a dolphin-specific elisa to measure acute- and convalescent-phase piv antibodies in dolphins during 1999-2006 with hemograms similar to that of the positive control. piv seroconversion oc ... | 2008 | 18325253 |
| aerobic microorganisms associated with free-ranging bottlenose dolphins in coastal gulf of mexico and atlantic ocean waters. | our abilities to assess health risks to free-ranging dolphin populations, to treat live-stranded or captive dolphins, and to evaluate the risks of disease transmission between humans and dolphins have suffered from a lack of basic information on microorganisms associated with normal, presumably healthy free-ranging individuals. in order to provide these data, we sampled free-ranging bottlenose dolphins (tursiops truncatus) off florida, texas, and north carolina during 1990-2002. blowhole and ana ... | 2006 | 17092884 |
| polychlorinated biphenyls and toxaphene in preferred prey fish of coastal southeastern u.s. bottlenose dolphins (tursiops truncatus). | legacy organochlorine (oc) contaminants continue to pose a potential risk to ecological and human health in coastal aquatic ecosystems of the southeastern united states. polychlorinated biphenyls (pcbs) and toxaphene (tox) were analyzed by gas chromatography with electron capture detection and negative chemical ionization mass spectrometry in 77 composites of four inshore fish species commonly preyed upon by bottlenose dolphins (tursiops truncatus) from estuaries near savannah, georgia (sav), br ... | 2005 | 16445095 |
| a comparison of several serologic tests to detect antibodies to toxoplasma gondii in naturally exposed bottlenose dolphins (tursiops truncatus). | toxoplasma gondii infection in marine mammals is intriguing and indicative of contamination of the ocean environment and coastal waters with oocysts. in a previous study, 138 of 141 (97.8%) bottlenose dolphins (tursiops truncatus) from the coasts of florida and california had antibodies to t. gondii by the modified agglutination test (mat). although the mat has been found to be highly sensitive and specific for t. gondii antibodies from several species of terrestrial animals, it has not yet been ... | 2005 | 16419751 |
| morbilliviral disease in an atlantic bottlenose dolphin (tursiops truncatus) from the gulf of mexico. | a free-living adult female atlantic bottlenose dolphin (tursiops truncatus) found dead near panama city, florida (usa), had necrotizing and ulcerative tracheitis, suppurative and hemorrhagic pneumonia, and necrotizing myocarditis; fungal hyphae were present in these lesions. additionally, lungs had multifocal proliferative interstitial pneumonia with occasional syncytial cells. some syncytial cells and type ii pneumocytes contained eosinophilic intranuclear or intracytoplasmic inclusion bodies, ... | 1994 | 7760493 |
| morbilliviral disease in atlantic bottlenose dolphins (tursiops truncatus) from the 1987-1988 epizootic. | lungs and lymph nodes of 79 atlantic bottlenose dolphins (tursiops truncatus) that died from 6 august 1987 to 16 april 1988 along the atlantic coasts of new jersey, virginia, and florida (usa) were examined histologically and were tested for the presence of morbillivirus antigen by an immunoperoxidase technique. lung lesions included areas of interstitial pneumonia characterized by varying combinations of type ii pneumocyte hyperplasia, interstitial fibroplasia and leukocytes, syncytia, and intr ... | 1994 | 7760492 |
| lobomycosis as a disease of the atlantic bottle-nosed dolphin (tursiops truncatus montagu, 1821). | skin lesions on an atlantic bottlenosed dolphin, captured off the coast of florida, were investigated and found to be histologically and microbiologically indistinguishable from those caused in humans by loboa loboi. all attempts to isolate the etiologic agent or to transmit the infection to mice and monkeys ended in failure. sight records of other suspected dolphin cases of lobomycosis in florida waters are described along with citations of two previously confirmed and published dolphin infecti ... | 1975 | 1111350 |
| lobomycosis in offshore bottlenose dolphins (tursiops truncatus), north carolina. | lacazia loboi, a cutaneous fungus, is found in humans and dolphins from transitional tropical (florida) and tropical (south america) regions. we report 2 cases of lobomycosis in stranded bottlenose dolphins (tursiops truncatus) and 1 case of lobomycosis-like disease in 1 free-swimming, pelagic, offshore bottlenose dolphin from north carolina, where no cases have previously been observed. | 2009 | 19331739 |
| lacaziosis in bottlenose dolphins (tursiops truncatus) in the indian river lagoon, florida, usa. | the objective of this study was to document the presence of the fungal granulomatous skin disease lacaziosis in stranded indian river lagoon (irl) bottlenose dolphins (tursiops truncatus). from 1 january 2007 through 31 december 2007, stranded dolphins from the northern part of the irl were thoroughly examined, and appropriate tissue samples were collected. the intralesional fungal agent (lacazia loboi) was identified histologically in three bottlenose dolphins. histologically, lacaziosis has be ... | 2009 | 19617500 |
| lacaziosis in bottlenose dolphins tursiops truncatus along the coastal atlantic ocean, florida, usa. | this study represents the first systematic study of lacaziosis (lobomycosis) in bottlenose dolphins tursiops truncatus in the atlantic ocean along the east-central coast of florida, usa. lacaziosis is a chronic infection of the skin caused by the fungus lacazia loboi, which affects only dolphins and humans. previous studies have shown a high prevalence (6.8 to 12.0%) of lacaziosis in resident dolphins from the adjacent indian river lagoon estuary (irl), where the disease is endemic. we examined ... | 2010 | 21166316 |
| lacaziosis and lacaziosis-like prevalence among wild, common bottlenose dolphins tursiops truncatus from the west coast of florida, usa. | lacaziosis (lobomycosis; lacazia loboi) is a fungal skin disease that naturally occurs only in humans and dolphins. the first reported case of lacaziosis in a bottlenose dolphin tursiops truncatus occurred in 1970 in sarasota bay, florida, usa, and subsequent photo-id monitoring of the sarasota bay dolphin population has revealed persistence of the disease. the objectives of this study were to estimate lacaziosis prevalence (p) in 2 bottlenose dolphin populations on the west coast of florida (sa ... | 2011 | 21797035 |
| risk factors for colonization of e. coli in atlantic bottlenose dolphins (tursiops truncatus) in the indian river lagoon, florida. | opportunistic pathogens related to degradation in water quality are of concern to both wildlife and public health. the objective of this study was to identify spatial, temporal, and environmental risk factors for e. coli colonization among atlantic bottlenose dolphins (tursiops truncatus) inhabiting the indian river lagoon (irl), fl between 2003 and 2007. age, gender, capture location, coastal human population density, proximity of sewage treatment plants, number of septic tanks, cumulative prec ... | 2011 | 21977048 |
| associations between mercury and hepatic, renal, endocrine, and hematological parameters in atlantic bottlenose dolphins (tursiops truncatus) along the eastern coast of florida and south carolina. | we evaluated associations between total mercury (hg) concentrations in blood and skin and endocrine, hepatic, renal, and hematological parameters in free-ranging bottlenose dolphins (tursiops truncatus). dolphins in indian river lagoon, fl had higher concentrations of hg in blood (0.67 µg/l wet wt) and skin (7.24 µg/g dry wt) compared with those from charleston harbor, sc (0.15 µg/l wet wt, 1.68 µg/g dry wt). an inverse relationship was observed between blood and skin hg concentrations and total ... | 2011 | 21340575 |
| examination of naturally exposed bottlenose dolphins (tursiops truncatus) for microsporidia, cryptosporidium, and giardia. | bottlenose dolphins (tursiops truncatus) captured in the estuarine waters off the coasts of south carolina and florida were examined for the presence of microsporidia, cryptosporidium sp., and giardia sp. dna extracted from feces or rectal swabs was amplified by polymerase chain reaction using parasite-specific small subunit ribosomal rna gene primers. all positive specimens were subjected to gene sequence analysis. of 83 dolphins, 17 were positive for microsporidia. none was positive for crypto ... | 2008 | 18372633 |
| patterns of population structure for inshore bottlenose dolphins along the eastern united states. | globally distributed, the bottlenose dolphin (tursiops truncatus) is found in a range of offshore and coastal habitats. using 15 microsatellite loci and mtdna control region sequences, we investigated patterns of genetic differentiation among putative populations along the eastern us shoreline (the indian river lagoon, florida, and charleston harbor, south carolina) (microsatellite analyses: n = 125, mtdna analyses: n = 132). we further utilized the mtdna to compare these populations with those ... | 2017 | 24129993 |
| distribution of mercury and selenium in blood compartments of bottlenose dolphins (tursiops truncatus) from sarasota bay, florida. | total mercury and selenium concentrations ([thg], [se]) in serum, plasma, whole blood, and packed cells were examined in a resident population of free-ranging bottlenose dolphins (tursiops truncatus) from sarasota bay, florida, usa. the authors determined how these elements partition in blood and assess compartment-specific associations. determining the distribution of se and thg can provide physiologic insight into potential association of hg with selenol-containing biomolecules (e.g., antioxid ... | 2013 | 23861289 |
| comparative analysis of three brevetoxin-associated bottlenose dolphin (tursiops truncatus) mortality events in the florida panhandle region (usa). | in the florida panhandle region, bottlenose dolphins (tursiops truncatus) have been highly susceptible to large-scale unusual mortality events (umes) that may have been the result of exposure to blooms of the dinoflagellate karenia brevis and its neurotoxin, brevetoxin (pbtx). between 1999 and 2006, three bottlenose dolphin umes occurred in the florida panhandle region. the primary objective of this study was to determine if these mortality events were due to brevetoxicosis. analysis of over 850 ... | 2012 | 22916189 |
| were multiple stressors a 'perfect storm' for northern gulf of mexico bottlenose dolphins (tursiops truncatus) in 2011? | an unusual number of near term and neonatal bottlenose dolphin (tursiops truncatus) mortalities occurred in the northern gulf of mexico (ngom) in 2011, during the first calving season after two well documented environmental perturbations; sustained cold weather in 2010 and the deepwater horizon oil spill (dwhos). preceding the stranding event, large volumes of cold freshwater entered the ngom due to unusually large snowmelt on the adjacent watershed, providing a third potential stressor. we cons ... | 2012 | 22815950 |
| lack of variation in voltage-gated sodium channels of common bottlenose dolphins (tursiops truncatus) exposed to neurotoxic algal blooms. | in coastal marine ecosystems, neurotoxins produced by harmful algal blooms (habs) often result in large-scale mortality events of many marine species. historical and frequent exposure to habs therefore may provide a strong selective pressure for adaptations that result in toxin resistance. neurotoxin resistance has independently evolved in a variety of terrestrial and marine species via mutations in genes encoding the toxin binding sites within the voltage-gated sodium channel gene complex. acco ... | 2014 | 25456229 |
| from genome-wide to candidate gene: an investigation of variation at the major histocompatibility complex in common bottlenose dolphins exposed to harmful algal blooms. | the role the major histocompatibility complex (mhc) plays in response to exposure to environmental toxins is relatively poorly understood, particularly in comparison to its well-described role in pathogen immunity. we investigated associations between mhc diversity and resistance to brevetoxins in common bottlenose dolphins (tursiops truncatus). a previous genome-wide association study investigating an apparent difference in harmful algal bloom (hab) resistance among dolphin populations in the g ... | 2015 | 25475909 |
| individual specialization in the foraging habits of female bottlenose dolphins living in a trophically diverse and habitat rich estuary. | we examine individual specialization in foraging habits (foraging habitat and trophic level) of female bottlenose dolphins (tursiops truncatus) resident in sarasota bay, florida, usa, by analyzing time series of stable isotope (δ(15)n and δ(13)c) values in sequential growth layer groups within teeth. the isotope data provide a chronology of foraging habits over the lifetime of the individual and allowed us to show that female bottlenose dolphins exhibit a high degree of individual specialization ... | 2015 | 25656585 |
| adrenal hormones in common bottlenose dolphins (tursiops truncatus): influential factors and reference intervals. | inshore common bottlenose dolphins (tursiops truncatus) are exposed to a broad spectrum of natural and anthropogenic stressors. in response to these stressors, the mammalian adrenal gland releases hormones such as cortisol and aldosterone to maintain physiological and biochemical homeostasis. consequently, adrenal gland dysfunction results in disruption of hormone secretion and an inappropriate stress response. our objective herein was to develop diagnostic reference intervals (ris) for adrenal ... | 2015 | 25993341 |
| mercury concentrations in atlantic bottlenose dolphins (tursiops truncatus) inhabiting the indian river lagoon, florida: patterns of spatial and temporal distribution. | bottlenose dolphins (tursiops truncatus) inhabiting the indian river lagoon, fl (irl) have tissue mercury concentrations among the highest reported worldwide. analysis of total mercury (thg) concentrations in blood collected between 2003 and 2012 showed a significant linear decrease over time (p=0.04). significant differences in the spatial distribution of thg in resident irl dolphins were also observed with a general gradient in concentration from north to south. evaluation of local biogeochemi ... | 2015 | 26119626 |
| genomewide investigation of adaptation to harmful algal blooms in common bottlenose dolphins (tursiops truncatus). | harmful algal blooms (habs), which can be lethal in marine species and cause illness in humans, are increasing worldwide. in the gulf of mexico, habs of karenia brevis produce neurotoxic brevetoxins that cause large-scale marine mortality events. the long history of such blooms, combined with the potentially severe effects of exposure, may have produced a strong selective pressure for evolved resistance. advances in next-generation sequencing, in particular genotyping-by-sequencing, greatly enab ... | 2015 | 26290192 |
| mucocutaneous lesions in free-ranging atlantic bottlenose dolphins tursiops truncatus from the southeastern usa. | mucocutaneous lesions were biopsied from free-ranging atlantic bottlenose dolphins tursiops truncatus inhabiting the indian river lagoon (irl), florida, and estuarine waters of charleston (chs), south carolina, usa, between 2003 and 2013. a total of 78 incisional biopsies from 58 dolphins (n=43 irl, n=15 chs) were examined. thirteen dolphins had 2 lesions biopsied at the same examination, and 6 dolphins were re-examined and re-biopsied at time intervals varying from 1 to 8 yr. biopsy sites inclu ... | 2015 | 26290502 |
| spatial variation in the accumulation of pops and mercury in bottlenose dolphins of the lower florida keys and the coastal everglades (south florida). | the bottlenose dolphin (tursiops truncatus) is an upper trophic level predator and the most common cetacean species found in nearshore waters of southern florida, including the lower florida keys (lfk) and the florida coastal everglades (fce). the objective of this study was to assess contamination levels of total mercury (t-hg) in skin and persistent organic pollutants (pcbs, pbdes, ddxs, hchs, hcb, σ pcdd/fs and σ dl-pcbs) in blubber samples of bottlenose dolphins from lfk (n = 27) and fce (n ... | 2017 | 27742439 |
| health and environmental risk assessment project for bottlenose dolphins tursiops truncatus from the southeastern usa. i. infectious diseases. | from 2003 to 2015, 360 free-ranging atlantic bottlenose dolphins tursiops truncatus inhabiting the indian river lagoon (irl, n = 246), florida, and coastal waters of charleston (chs, n = 114), south carolina, usa, were captured, given comprehensive health examinations, and released as part of a multidisciplinary and multi-institutional study of individual and population health. the aim of this review is to summarize the substantial health data generated by this study and to examine morbidity bet ... | 2017 | 28737159 |
| health and environmental risk assessment project for bottlenose dolphins tursiops truncatus from the southeastern usa. ii. environmental aspects. | bottlenose dolphins tursiops truncatus are the most common apex predators found in coastal and estuarine ecosystems along the southeastern coast of the usa, where these animals are exposed to multiple chemical pollutants and microbial agents. in this review, we summarize the results of investigations of environmental exposures evaluated in 360 free-ranging dolphins between 2003 and 2015. bottlenose dolphins inhabiting the indian river lagoon, florida (irl, n = 246), and coastal waters of charles ... | 2017 | 28737160 |
| malignant seminoma with metastasis, sertoli cell tumor, and pheochromocytoma in a spotted dolphin (stenella frontalis) and malignant seminoma with metastasis in a bottlenose dolphin (tursiops truncatus). | seminoma with metastasis was diagnosed in a spotted dolphin (stenella frontalis) and an atlantic bottlenose dolphin (tursiops truncatus). sertoli cell tumor and pheochromocytoma were also diagnosed in the spotted dolphin. the spotted and bottlenose dolphins were adult males that stranded and died on the coasts of northwest florida and southeast north carolina, respectively. neoplasia is infrequently reported in cetaceans. this is the first report of seminoma, sertoli cell tumor, and pheochromocy ... | 2005 | 15872383 |
| fishery gear interactions from stranded bottlenose dolphins, florida manatees and sea turtles in florida, u.s.a. | documenting the extent of fishery gear interactions is critical to wildlife conservation efforts, especially for reducing entanglements and ingestion. this study summarizes fishery gear interactions involving common bottlenose dolphins (tursiops truncatus truncatus), florida manatees (trichechus manatus latirostris) and sea turtles: loggerhead (caretta caretta), green turtle (chelonia mydas), leatherback (dermochelys coriacea), hawksbill (eretmochelys imbricata), kemp's ridley (lepidochelys kemp ... | 2014 | 24613263 |
| histologic findings in free-ranging sarasota bay bottlenose dolphin (tursiops truncatus) skin: mercury, selenium, and seasonal factors. | full-thickness epidermal biopsy samples were collected from free-ranging common bottlenose dolphins (tursiops truncatus) in sarasota bay, florida, usa. season (summer or winter) of collection, mercury (hg) concentration, and selenium (se) concentration were compared to histologic parameters. epidermal hg concentration was positively related to age (p<0.001) and negatively related to height of the stratum spinosum (p<0.05). the mitotic index and heights of the stratum externum and intermedium wer ... | 2011 | 22102676 |
| concurrent exposure of bottlenose dolphins (tursiops truncatus) to multiple algal toxins in sarasota bay, florida, usa. | sentinel species such as bottlenose dolphins (tursiops truncatus) can be impacted by large-scale mortality events due to exposure to marine algal toxins. in the sarasota bay region (gulf of mexico, florida, usa), the bottlenose dolphin population is frequently exposed to harmful algal blooms (habs) of karenia brevis and the neurotoxic brevetoxins (pbtx; btx) produced by this dinoflagellate. live dolphins sampled during capture-release health assessments performed in this region tested positive f ... | 2011 | 21423740 |
| prevalence and pathology of lungworm infection in bottlenose dolphins tursiops truncatus from southwest florida. | parasitism of the respiratory system is a relatively common finding in stranded cetaceans; however, no systematic investigations regarding the severity, distribution, and clinical consequences of these infections in bottlenose dolphins tursiops truncatus have been conducted previously. the present study determined the prevalence of lungworm infections in dead stranded (n=22) and live bottlenose dolphins (n=44) from southwestern florida, usa, during the period from 2003 to 2005. dead stranded bot ... | 2009 | 20183968 |
| polybrominated diphenyl ethers and their hydroxylated analogs in plasma of bottlenose dolphins (tursiops truncatus) from the united states east coast. | polybrominated diphenyl ethers (pbdes) and hydroxylated pbdes (oh-pbdes) were determined in plasma of free-ranging bottlenose dolphins (tursiops truncatus) from charleston (chs), south carolina, and the indian river lagoon (irl), florida, u.s.a. significantly lower sums (sigma) of pbde concentrations (sum of 12 congeners) were found in animals from the irl (arithmetic mean, 5.45 +/- 4.63 ng/g wet wt) compared with those from chs (30 +/- 40 ng/g wet wt). brominated diphenyl ether (bde)-47 was the ... | 2009 | 19499968 |
| home ranges of bottlenose dolphins (tursiops truncatus) in the indian river lagoon, florida: environmental correlates and implications for management strategies. | photo-identification surveys conducted between 2002 and 2005 were used to determine dolphin home ranges and site fidelity within the indian river lagoon (irl), florida. the irl was divided into six segments based on hydrodynamics and geographic features for purposes of characterization. among the 615 dolphins with identifiable dorsal fins, 339 had > or =6 sightings and were used in segment and linear range analyses. the majority (98%) of dolphins were seen in < or =3 consecutive segments (331/33 ... | 2008 | 18841416 |
| lobomycosis in bottlenose dolphins (tursiops truncatus) from the indian river lagoon, florida: estimation of prevalence, temporal trends, and spatial distribution. | lobomycosis (lacaziosis) is a chronic fungal disease of the skin that affects only dolphins and humans. previous studies have shown a high prevalence of lobomycosis in bottlenose dolphins (tursiops truncatus) from the indian river lagoon, florida (irl). we studied the occurrence and distribution of lobomycosis in the irl using photo-identification survey data collected between 1996 and 2006. our objectives were to (1) determine the sensitivity and specificity of photo-identification for diagnosi ... | 2008 | 18712442 |
| immune dysfunction in atlantic bottlenose dolphins (tursiops truncatus) with lobomycosis. | lobomycosis (lacaziosis) occurs only in humans and dolphins under natural conditions. we evaluated the immune status of eight dolphins with lobomycosis and 40 healthy dolphins from the indian river lagoon (irl), florida. lobomycosis cases had multiple abnormalities in their immunologic parameters when compared to healthy dolphins. the absolute number of circulating lymphocytes and serum albumin concentration were reduced (p<0.05) while the segmented neutrophils, alpha 1, total beta, total gamma ... | 2009 | 18608890 |
| health of common bottlenose dolphins ( tursiops truncatus ) in barataria bay, louisiana, following the deepwater horizon oil spill. | the oil spill resulting from the explosion of the deepwater horizon drilling platform initiated immediate concern for marine wildlife, including common bottlenose dolphins in sensitive coastal habitats. to evaluate potential sublethal effects on dolphins, health assessments were conducted in barataria bay, louisiana, an area that received heavy and prolonged oiling, and in a reference site, sarasota bay, florida, where oil was not observed. dolphins were temporarily captured, received a veterina ... | 2014 | 24350796 |
| fine-scale spatial variation of persistent organic pollutants in bottlenose dolphins (tursiops truncatus) in biscayne bay, florida. | bottlenose dolphins (tursiops truncatus) are long-term residents and apex predators in southeast u.s. estuaries and are vulnerable to bioaccumulation of persistent organic pollutants (pops). dart biopsy samples were collected from 45 dolphins in biscayne bay (miami, fl), 34 of which were matched using fin markings to a photo identification catalogue. blubber samples were analyzed for 73 polychlorinated biphenyl (pcb) congeners, six polybrominated diphenyl ether (pbde) congeners, and organochlori ... | 2007 | 18044492 |
| spatial distribution of bottlenose dolphins (tursiops truncatus) inferred from stable isotopes and priority organic pollutants. | differences in priority organic pollutants (pops), analyzed by gas chromatography-mass spectrometry, and stable isotope ratios (δ(13)c, δ(34)s, and δ(15)n; analyzed by isotope ratio-mass spectrometry), divide 77 bottlenose dolphins (tursiops truncatus) from the florida gulf coast into three distinct groups. pop levels reflect human population and historical contamination along the coast. in the least disturbed site, concentrations of σpop in male dolphins were 18,000 ng g(-1)±6000 (95% confidenc ... | 2012 | 22464275 |
| hematologic, biochemical, and cytologic findings from apparently healthy atlantic bottlenose dolphins (tursiops truncatus) inhabiting the indian river lagoon, florida, usa. | the objective of this study was to establish reference baseline data for hematologic, biochemical, and cytologic findings in apparently healthy atlantic bottlenose dolphins (tursiops truncatus) inhabiting the indian river lagoon, florida, usa. sixty-two dolphins were captured, examined, and released during june 2003 and june 2004. mean, standard deviation, and range were calculated for each parameter, and values for which published data were available, were close to or within the ranges previous ... | 2006 | 16870874 |
| integrating life-history and reproductive success data to examine potential relationships with organochlorine compounds for bottlenose dolphins (tursiops truncatus) in sarasota bay, florida. | research initiated in 1970 has identified a long-term, year-round resident community of about 140 bottlenose dolphins (tursiops truncatus) in sarasota bay, florida, providing unparalleled opportunities to investigate relationships between organochlorine contaminant residues and life-history and reproductive parameters. many individual dolphins are identifiable and of known age, sex, and maternal lineage (< or =4 generations). observational monitoring provides data on dolphin spatial and temporal ... | 2005 | 16198673 |
| a division of labour with role specialization in group-hunting bottlenose dolphins (tursiops truncatus) off cedar key, florida. | individual role specialization during group hunting is extremely rare in mammals. observations on two groups of bottlenose dolphins (tursiops truncatus) in cedar key, florida revealed distinctive behavioural roles during group feeding. in each group, one individual was consistently the 'driver', herding the fishes in a circle toward the remaining 'barrier' dolphins. aerial fish-capture rates differed between groups, as well as between the driver and barrier dolphins, in one group but not in the ... | 2005 | 15695203 |
| signature-whistle production in undisturbed free-ranging bottlenose dolphins (tursiops truncatus). | data from behavioural observations and acoustic recordings of free-ranging bottlenose dolphins (tursiops truncatus) were analysed to determine whether signature whistles are produced by wild undisturbed dolphins, and how whistle production varies with activity and group size. the study animals were part of a resident community of bottlenose dolphins near sarasota, florida, usa. this community of dolphins provides a unique opportunity for the study of signature-whistle production, since most anim ... | 2004 | 15293858 |
| comparison of elements in bottlenose dolphins stranded on the beaches of texas and florida in the gulf of mexico over a one-year period. | we analyzed tissue samples from bottlenose dolphins (tursiops truncatus) that had stranded on beaches in texas and florida over a 1-year period starting in september 1991. the concentrations of 10 elements plus methyl mercury (mehg) were determined in brain, kidney, and liver, and we examined these results for differences based upon age, site, sex, and tissue type. a strong inverse relationship between total mercury (hg) and the percentage that was mehg was found in liver, kidney, and brain tiss ... | 1999 | 9828266 |
| annual, seasonal and individual variation in hematology and clinical blood chemistry profiles in bottlenose dolphins (tursiops truncatus) from sarasota bay, florida. | hematology and clinical blood chemistry (hcbc) profiles in free-living bottlenose dolphins from sarasota bay, florida have been monitored over a 14-year period. this long-term dataset includes samples from recaptured dolphins, enabling individual variation to be accounted for when investigating seasonal and annual variability. four different laboratories carried out the assays and inter-laboratory comparisons found significant differences in 31 of 39 parameters measured. however, variability in ... | 2007 | 17524692 |
| estimated communication range of social sounds used by bottlenose dolphins (tursiops truncatus). | bottlenose dolphins, tursiops truncatus, exhibit flexible associations in which the compositions of groups change frequently. we investigated the potential distances over which female dolphins and their dependent calves could remain in acoustic contact. we quantified the propagation of sounds in the frequency range of typical dolphin whistles in shallow water areas and channels of sarasota bay, florida. our results indicated that detection range was noise limited as opposed to being limited by h ... | 2006 | 17004488 |
| perfluoroalkyl compounds in relation to life-history and reproductive parameters in bottlenose dolphins (tursiops truncatus) from sarasota bay, florida, u.s.a. | perfluoroalkyl compounds (pfcs) were determined in plasma, milk, and urine of free-ranging bottlenose dolphins (tursiops truncatus) from sarasota bay (fl, usa) during three winter and two summer capture-and-release programs (2002-2005). plasma and urine samples were extracted using an ion-pairing method. perfluoroalkyl compounds were extracted from milk samples using acetonitrile, and extracts were cleaned with graphitized nonporous carbon. all extracts were analyzed by high-performance liquid c ... | 2006 | 16986796 |