| serological evidence of morbillivirus infection in small cetaceans from the southeast pacific. | the presence of morbillivirus-specific serum antibodies was examined by an indirect enzyme linked immunosorbent assay (ielisa) and virus neutralization tests in serum samples from 30 dusky dolphins (lagenorhynchus obscurus), 8 long-snouted common dolphins (delphinus capensis), 2 inshore and 6 offshore bottlenose dolphins (tursiops truncatus) and 20 burmeister's porpoises (phocoena spinipinnis) taken in fisheries off central peru in 1993-1995. the sera from six dusky dolphins, one common dolphin ... | 1998 | 9549850 |
| serological evidence of brucella species infection in odontocetes from the south pacific and the mediterranean. | sera from 58 odontocetes taken in fisheries off peru in 1993 to 1995 and from 24 cetaceans stranded along the spanish coast of the mediterranean in 1997 to 1999 were tested for the presence of brucella species antibodies in competitive and indirect elisas (celisa and ielisa). among the animals from peru, 21 of 27 (77.8 per cent) lagenorhynchus obscurus, three of six delphinus capensis, one of two inshore and two of three offshore tursiops truncatus and five of 20 (25 per cent) phocoena spinipinn ... | 2001 | 11400986 |
| contamination by persistent organochlorines in cetaceans incidentally caught along brazilian coastal waters. | wide ranges of organochlorine residues were determined in the blubber of franciscana (pontoporia blainvillei), estuarine dolphin (sotalia guianensis), atlantic spotted dolphin (stenella frontalis), and long-beaked common dolphin (delphinus capensis) incidentally caught along brazilian coastal waters. concentrations of ddts and pcbs were the highest, followed by chls, tcpmoh, dieldrin, tcpme, heptachlor epoxide, hcb, and hchs. unexpectedly, significant pollution of pcbs, ddts, tcpme, and tcpmoh w ... | 2004 | 15025172 |
| concentration and subcellular distribution of trace elements in liver of small cetaceans incidentally caught along the brazilian coast. | concentrations of trace elements (v, cr, mn, fe, co, cu, zn, ga, as, se, rb, sr, mo, ag, cd, sb, cs, ba, t-hg, org-hg, tl and pb) were determined in liver samples of estuarine dolphin (sotalia guianensis; n = 20), franciscana dolphin (pontoporia blainvillei; n = 23), atlantic spotted dolphin (stenella frontalis; n = 2), common dolphin (delphinus capensis; n = 1) and striped dolphin (stenella coeruleoalba; n = 1) incidentally caught along the coast of sao paulo state and parana state, brazil, fro ... | 2004 | 15476836 |
| gaussian mixture model classification of odontocetes in the southern california bight and the gulf of california. | a method for the automatic classification of free-ranging delphinid vocalizations is presented. the vocalizations of short-beaked and long-beaked common (delphinus delphis and delphinus capensis), pacific white-sided (lagenorhynchus obliquidens), and bottlenose (tursiops truncatus) dolphins were recorded in a pelagic environment of the southern california bight and the gulf of california over a period of 4 years. cepstral feature vectors are extracted from call data which contain simultaneous ov ... | 2007 | 17407910 |
| clostridium perfringens septicemia in a long-beaked common dolphin delphinus capensis: an etiology of gas bubble accumulation in cetaceans. | an adult female long-beaked common dolphin delphinus capensis live-stranded in la jolla, california, usa, on july 30, 2012 and subsequently died on the beach. computed tomography and magnetic resonance imaging revealed gas bubble accumulation in the vasculature, organ parenchyma, mandibular fat pads, and subdermal sheath as well as a gas-filled cavity within the liver, mild caudal abdominal effusion, and fluid in the uterus. gross examination confirmed these findings and also identified mild ulc ... | 2014 | 25320031 |
| accumulation of butyltin compounds in cetaceans from korean coastal waters. | data on the occurrence and accumulation profiles of butyltins (bts), including tributyltin (tbt), in marine mammals are scarce. this is the first study to investigate residue levels and accumulation patterns of bts in cetaceans from korean coastal waters. the total concentrations of bts (sum of mono- to tri-butyltins) in minke whales (balaenoptera acutorostrata) and long-beaked common dolphins (delphinus capensis) ranged from 15.7 to 297 ng/g wet weight (mean: 100 ng/g wet weight) and from 59.0 ... | 2011 | 21474154 |
| perfluorinated compounds in minke whales (balaenoptera acutorostrata) and long-beaked common dolphins (delphinus capensis) from korean coastal waters. | this is the first study to report the concentrations and accumulation profiles of pfcs in marine mammals from korea. the concentrations and profiles of 10 pfcs in the liver of minke whales and common dolphins from korean coastal waters were recorded in this study. the mean concentrations of pfos and pfunda were 3-20 times higher than that found for other pfcs analyzed. the concentrations of pfos in cetaceans from korea were relatively lower than those reported in other countries. inter-species d ... | 2010 | 20451932 |
| caudal fin allometry in the white shark carcharodon carcharias: implications for locomotory performance and ecology. | allometric scaling analysis was employed to investigate the consequences of size evolution on hydrodynamic performance and ecology in the white shark carcharodon carcharias. discriminant analysis using the power equation y=ax(b) was negative for caudal fin span (s) versus fork length (fl) in c. carcharias. in contrast in two delphinid species, delphinus capensis and tursiops aduncus, the span of the flukes versus fork length rises in positive allometric fashion, and strong positive allometry of ... | 2005 | 15772806 |
| molecular and morphological differentiation of common dolphins (delphinus sp.) in the southwestern atlantic: testing the two species hypothesis in sympatry. | the taxonomy of common dolphins (delphinus sp.) has always been controversial, with over twenty described species since the original description of the type species of the genus (delphinus delphis linnaeus, 1758). two species and four subspecies are currently accepted, but recent molecular data have challenged this view. in this study we investigated the molecular taxonomy of common dolphins through analyses of cytochrome b sequences of 297 individuals from most of their distribution. we include ... | 2015 | 26559411 |
| automatic classification of delphinids based on the representative frequencies of whistles. | classification of odontocete species remains a challenging task for passive acoustic monitoring. classifiers that have been developed use spectral features extracted from echolocation clicks and whistle contours. most of these contour-based classifiers require complete contours to reduce measurement errors. therefore, overlapping contours and partially detected contours in an automatic detection algorithm may increase the bias for contour-based classifiers. in this study, classification was cond ... | 2015 | 26328716 |
| association of an unusual marine mammal mortality event with pseudo-nitzschia spp. blooms along the southern california coastline. | during 2002, 2,239 marine mammals stranded in southern california. this unusual marine mammal stranding event was clustered from april to june and consisted primarily of california sea lions (zalophus californianus) and long-beaked common dolphins (delphinus capensis) with severe neurologic signs. intoxication with domoic acid (da), a marine neurotoxin produced during seasonal blooms of pseudo-nitzschia spp., was suspected. definitively linking harmful algal blooms to large-scale marine mammal m ... | 2009 | 19204340 |
| genetic differentiation among recently diverged delphinid taxa determined using aflp markers. | in the mid-1990s, a new common dolphin species (delphinus capensis) was defined in the northeast pacific using morphological characters and mitochondrial dna (mtdna) sequences. this species is sympatric with a second species, delphinus delphis; morphological differences between the two are slight and it is clear they are closely related. does the phenotypic distinction result from only a few important genes or from large differences between their nuclear genomes? we used amplified fragment lengt ... | 2006 | 14757724 |
| diseases, lesions and malformations in the long-beaked common dolphin delphinus capensis from the southeast pacific. | miscellaneous lesions of the head, skull, teeth, trunk, appendages, skin and genital tract were observed in 120 of 930 long-beaked common dolphins delphinus capensis taken in fisheries off peru between 1985 and 2000. seven subsamples were defined according to the varying field sampling protocols. forty-two dolphins showed at least 2 types of injuries or diseases affecting 1 or more organs. the majority (5 of 7) of traumas encountered were diagnosed as caused by violent, fisheries-related interac ... | 2006 | 16532606 |
| how to capture fish in a school? effect of successive predator attacks on seabird feeding success. | prey aggregations, such as fish schools, attract numerous predators. this typically leads to the formation of multispecific groups of predators. these aggregations can be seen both as a place of increased competition and as a place of possible facilitation between predators. consequently, the functional role of such predator-prey aggregation is uncertain, and its effect on individual feeding success is virtually unknown. using underwater film footage of different predators feeding on fish school ... | 2016 | 26768335 |
| accumulation of pahs and synthetic musk compound in minke whales (balanoptera acutorostrata) and long-beaked common dolphins (delphinus capensis) from korean coastal waters. | information on the occurrence and accumulation profiles of polycyclic aromatic hydrocarbons (pahs) and synthetic musk compounds (smcs) in marine mammals is scarce. in the present study, we recorded the concentrations and profiles of pahs and smcs in liver tissue and blubber from minke whales and common dolphins from korean coastal waters. the overall concentrations of pahs and smcs in blubber from both cetacean species were approximately three to five times higher than those in liver tissues. re ... | 2012 | 22139736 |
| concentrations and accumulation features of pcdds, pcdfs and dioxin-like pcbs in cetaceans from korean coastal waters. | despite several studies that report accumulation of polychlorinated biphenyls (pcbs) and ddt in marine mammals worldwide, very few have examined polychlorinated dibenzo-p-dioxins and dibenzofurans (pcdd/fs) and dioxin-like pcbs. in particular, no earlier studies have reported concentrations and accumulation profiles of persistent organic pollutants (pops) in marine mammals from korea. in this study, concentrations and accumulation features of pcdd/fs and dioxin-like pcbs were measured in liver a ... | 2010 | 20299073 |
| could feeding habit and migratory behaviour be the causes of different toxicological hazard to cetaceans of gulf of california (mexico)? | in this work, a suite of diagnostic biomarkers was applied to seven cetacean species to evaluate the role of the feeding habits and migratory behavior in the toxicological status of these species from the gulf of california, mexico. we investigate the interspecific differences in cytochrome p450 1a1 and 2b (cyp1a1 and cyp2b, respectively), aryl hydrocarbon receptor and e2f transcription factor 1 and the contaminants levels [organochlorine compounds, polybrominated diphenyl ethers (pbdes) and pol ... | 2014 | 24510600 |
| profiling and spatial variation analysis of persistent organic pollutants in south african delphinids. | the continuous disposal of persistent organic pollutants (pops) in south africa (sa) warrants concern about their detrimental effects on humans and wildlife. we surveyed six dolphin species (n = 90) incidentally captured in shark net installations or stranded off the sa east and south coast from 2005 to 2009 to study the pop exposure. sousa plumbea, an inshore and estuarine species, was found to be the most contaminated by total pops (21 100 ng g(-1) lw) of all the dolphins off sa, followed by t ... | 2016 | 26967261 |
| functional morphology and symmetry in the odontocete ear complex. | odontocete ear complexes or tympanoperiotic complexes (tpcs) were compared for asymmetry. left and right tpcs were collected from one long-beaked common dolphin (delphinus capensis) and one amazon river dolphin (inia geoffrensis). asymmetry was assessed by volumetric comparisons of left and right tpcs and by visual comparison of superimposed models of the right tpc to a reflected mirror image of the left tpc. kolmogorov-smirnov tests were performed to compare the resonant frequencies of the tpcs ... | 2016 | 26610944 |
| concentrations of dde in blubber biopsies of free-ranging long-beaked common dolphin (delphinus capensis) in the gulf of california. | long-beaked common dolphins (delphinus capensis) in the gulf of california have been exposed to persistent contaminants that originated in large agricultural areas near the coast. live common dolphins were sampled by remote dart biopsies to determine concentrations of tddt in blubber. life stage and initial gender identification was determined by field observations. gender was confirmed by genetic analysis of the skin. concentration of tddt in blubber was analyzed by gas chromatography. the 16 s ... | 2015 | 25376965 |
| dental wear in dolphins (cetacea: delphinidae) from southern brazil. | (1) dental wear is a common phenomenon in mammals. its occurrence is influenced by tooth anatomy, animal physiology, biomechanics and behaviour. so far, investigations of dental wear in cetaceans have been scanty and superficial. we compare the frequencies of occurrence, location and intensity of dental wear in some species of dolphins from southern brazil, south atlantic ocean. (2) teeth of ten species were evaluated using a stereoscopic microscope to identify wear facets, which were classified ... | 2013 | 22939372 |
| influences of past climatic changes on historical population structure and demography of a cosmopolitan marine predator, the common dolphin (genus delphinus). | climatic oscillations during the pleistocene have greatly influenced the distribution and connectivity of many organisms, leading to extinctions but also generating biodiversity. while the effects of such changes have been extensively studied in the terrestrial environment, studies focusing on the marine realm are still scarce. here we used sequence data from one mitochondrial and five nuclear loci to assess the potential influence of pleistocene climatic changes on the phylogeography and demogr ... | 2012 | 22891814 |
| organochlorine compound accumulation in delphinids from rio de janeiro state, southeastern brazilian coast. | the present study investigated organochlorine compound levels (pcbs, ddts and hcb) in blubber samples of six delphinid species from rio de janeiro state, southeastern brazilian coast. the species analyzed inhabit the continental shelf (one killer whale, one false killer whale, two bottlenose dolphins, three rough-toothed dolphins, and four long-beaked common dolphins) and open ocean (four fraser's dolphins). pcbs represented the greatest proportion of the sum of all measured organochlorines (fro ... | 2012 | 22771469 |
| dental pathology in dolphins (cetacea: delphinidae) from the southern coast of brazil. | pathological processes observed in the stomatognathic systems of mammalian species are a useful source of information about the habits, evolution and general health of such animals. studies of pathological conditions on teeth are common in humans and other primates, but rare in wild animals in general and marine mammals in particular. for cetaceans, previous studies provided scanty records of dental anomalies in a few species. this is the first broad and systematic inventory of dental pathology ... | 2011 | 21790069 |
| classification of echolocation clicks from odontocetes in the southern california bight. | this study presents a system for classifying echolocation clicks of six species of odontocetes in the southern california bight: visually confirmed bottlenose dolphins, short- and long-beaked common dolphins, pacific white-sided dolphins, risso's dolphins, and presumed cuvier's beaked whales. echolocation clicks are represented by cepstral feature vectors that are classified by gaussian mixture models. a randomized cross-validation experiment is designed to provide conditions similar to those fo ... | 2011 | 21303026 |
| accumulation of organotin compounds in tissues and organs of dolphins from the coasts of thailand. | the concentration of organotin (ot) in seven species of dolphin (bottlenose dolphin, finless porpoise, indo-pacific humpbacked dolphin, long-beaked common dolphin, pantropical spotted dolphin, spinner dolphin, and striped dolphin), which were stranded on the coasts of thailand, were measured. butyltin (bt) and phenyltin (pt) compounds in tissues and organs of the dolphins were in the range of 16-1,152 microg kg(-1) and <1-62 microg kg(-1), respectively. the highest concentration of tributyltin ( ... | 2008 | 17687583 |