| the broadband social acoustic signaling behavior of spinner and spotted dolphins. | efforts to study the social acoustic signaling behavior of delphinids have traditionally been restricted to audio-range (<20 khz) analyses. to explore the occurrence of communication signals at ultrasonic frequencies, broadband recordings of whistles and burst pulses were obtained from two commonly studied species of delphinids, the hawaiian spinner dolphin (stenella longirostris) and the atlantic spotted dolphin (stenella frontalis). signals were quantitatively analyzed to establish their full ... | 2003 | 14514216 |
| hepatic lesions in cetaceans stranded in the canary islands. | this article describes the gross, histopathologic, and ultrastructural findings of the livers of cetaceans stranded on the coast of the canary islands between 1992 and 2000. a total of 135 cetaceans were included in the study, among which 25 were common dolphins (delphinus delphis), 23 atlantic spotted dolphins (stenella frontalis), 19 striped dolphins (stenella coeruleoalba), and 15 other species of dolphins and whales. the most common lesion observed in these animals was a nonspecific chronic ... | 2004 | 15017028 |
| 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 |
| strouhal numbers and optimization of swimming by odontocete cetaceans. | swimming efficiencies of fish and cetaceans have been related to a certain synchrony between stroke cycle frequency, peak-to-peak tail/fluke amplitude and mean swimming speed. these kinematic parameters form a non-dimensional wake parameter, referred to as a strouhal number, which for the range between 0.20 and 0.40 has been associated with enhanced swimming efficiency for fish and cetaceans. yet to date there has been no direct experimental substantiation of what strouhal numbers are preferred ... | 2004 | 15073196 |
| 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 |
| pathological and immunohistochemical study of gastrointestinal lesions in dolphins stranded in the canary islands. | this paper describes the gross, histopathological and immunohistochemical characteristics of gastrointestinal lesions and regional lymph nodes of six common dolphins (delphinus delphis), 11 striped dolphins (stenella coeruleoalba) and six atlantic spotted dolphins (stenella frontalis) found stranded along the coasts of the canary islands. the most common lesion was chronic granulomatous gastritis of the glandular stomach, associated with the parasite pholeter gastrophilus, and characterised by t ... | 2006 | 16997997 |
| a comparison of pectoral fin contact between two different wild dolphin populations. | contact behaviour involving the pectoral fin has been documented in a number of dolphin species, and various explanations about its function have been offered. pectoral fin contact can take a variety of forms, and involves a number of body parts and movements, likely differing depending upon social or ecological context. for this study, we compare the pectoral fin contact behaviour of two species of wild dolphins: indo-pacific bottlenose dolphins (tursiops aduncus) from around mikura island, jap ... | 2009 | 19070654 |
| cross-reactivity of anti-human, anti-porcine and anti-bovine cytokine antibodies with cetacean tissues. | the cross-reactivity of monoclonal antibodies specific for human, porcine and bovine cytokines was evaluated for three cetacean species: atlantic spotted dolphins (stenella frontalis), striped dolphins (stenella coeruleoalba) and fin whales (balaenoptera physalus). formalin-fixed and snap-frozen tissue sections of lung, spleen, liver and mesenteric lymph node were evaluated. t and b lymphocytes and monocytes/macrophages were detected by use of anti-human cd3, igg and lysozyme polyclonal antibodi ... | 2010 | 20163803 |
| a comparison of pectoral fin contact behaviour for three distinct dolphin populations. | tactile exchanges involving the pectoral fin have been documented in a variety of dolphin species. several functions (e.g., social, hygienic) have been offered as possible explanations for when and why dolphins exchange pectoral fin contacts. in this study, we compared pectoral fin contact between dolphin dyads from three distinct dolphin populations: two groups of wild dolphins; atlantic spotted dolphins (stenella frontalis) from the bahamas and indo-pacific bottlenose dolphins (tursiops aduncu ... | 2010 | 20176094 |
| metazoan parasites of cetaceans off the northeastern coast of brazil. | this study represents the first survey of the parasitic fauna of cetaceans off the northeastern coast of brazil. parasites were collected from 82 animals rescued from the states of ceará to bahia, including the archipelago of fernando de noronha. a total of 14 species of cetaceans were evaluated: sotalia guianensis, stenella sp., stenella clymene, stenella longirostris, stenella coeruleoalba, stenella frontalis, megaptera novaeangliae, peponocephala electra, steno bredanensis, kogia breviceps, k ... | 2010 | 20638793 |
| detection of helicobacter in the digestive tract of an atlantic spotted dolphin (stenella frontalis). | helicobacter spp. occur in the digestive system of a broad range of animal taxa, including marine mammals. only one formally recognized species, helicobacter cetorum, has been described in marine mammals. helicobacter has not been reported in the atlantic spotted dolphin (stenella frontalis). the purpose of our study was to examine the digestive tract of a stranded spotted dolphin for helicobacter. tissue and content samples were collected at necropsy and examined by histopathology and molecular ... | 2010 | 20688662 |
| fatal erysipelothrix rhusiopathiae septicemia in two atlantic dolphins (stenella frontalis and tursiops truncatus). | we describe gross, histopathologic, ultrastructural, immunohistochemical, and microbiologic features of acute septicemia by erysipelothrix rhusiopathiae in an atlantic spotted dolphin stenella frontalis and an atlantic bottlenose dolphin tursiops truncatus. generalized lymphadenomegaly and widespread hemorrhages were the most consistent macroscopic findings. tricavitary effusion and icterus were noted in one individual. histologically, all organs examined showed numerous variably sized bacillary ... | 2015 | 26378410 |
| echolocation signals of wild atlantic spotted dolphin (stenella frontalis). | an array of four hydrophones arranged in a symmetrical star configuration was used to measure the echolocation signals of the atlantic spotted dolphin (stenella frontalis) in the bahamas. the spacing between the center hydrophone and the other hydrophones was 45.7 cm. a video camera was attached to the array and a video tape recorder was time synchronized with the computer used to digitize the acoustic signals. the echolocation signals had bi-modal frequency spectra with a low-frequency peak bet ... | 2003 | 12558295 |
| diversity and distribution patterns of cetaceans in the subtropical southwestern atlantic outer continental shelf and slope. | temporal and spatial patterns of cetacean diversity and distribution were investigated through eight ship-based surveys carried out during spring and autumn between 2009 and 2014 on the outer continental shelf (~150m) and slope (1500m) off southeastern and southern brazil (~23°s to ~34°s). the survey area was divided into southeast and south areas according to their oceanographic characteristics. twenty-one species were observed in 503 sightings. the overall number of species was similar between ... | 2016 | 27243455 |
| immunohistochemical characterisation of parasitic pneumonias of dolphins stranded in the canary islands. | this is the first work that applies immunohistochemistry in the characterisation of the inflammatory infiltrate of verminous bronchopneumonia associated with lungworm parasites in stranded dolphins. samples from three different species (stenella coerulealba, stenella frontalis and delphinus delphis) stranded in the canary islands were used. the most common findings found in these animals varied from bronchitis to verminous bronchopneumonia with different degree of severity. the immunohistochemic ... | 2015 | 25882640 |
| immunopathological study of parasitic cholangitis in cetaceans. | this paper describes the immunophenotype of cellular inflammatory infiltrates in chronic cholangitis in six common dolphins (delphinus delphis), four striped dolphins (stenella coeruleoalba), three atlantic spotted dolphins (stenella frontalis) and one pygmy sperm whale (kogia breviceps) found stranded along the coasts of the canary islands (spain). a panel of 5 antibodies previously tested in dolphins (anti-cd3, -igg, -mhc class ii, -s100 protein and -lysozyme) were used. the present work also ... | 2013 | 23809732 |
| validating the use of biopsy sampling in contamination assessment studies of small cetaceans. | remote biopsy sampling is the most common technique for acquiring samples from free-ranging marine mammals. however, such techniques may result in variable sampling being sometimes superficial skin and blubber biopsies. for decades, blubber has been used to monitor the exposure of marine mammals to persistent organic pollutants (pops), but little is known regarding the variability of pops as a function of blubber depth in small cetaceans and the available literature offers variable results. thus ... | 2016 | 27113024 |
| prevalence of external injuries in small cetaceans in aruban waters, southern caribbean. | aruba, located close to the coasts of colombia and venezuela, is one of the most densely populated islands in the caribbean and supports a wide range of marine-related socio-economic activities. however, little is known about the impacts of human activities on the marine environment. injuries in marine mammals can be used to examine interactions with human activities and identify potential threats to the survival of populations. the prevalence of external injuries and tooth rake marks were exami ... | 2014 | 24586473 |
| trophic relationships and habitat preferences of delphinids from the southeastern brazilian coast determined by carbon and nitrogen stable isotope composition. | to investigate the foraging habitats of delphinids in southeastern brazil, we analyzed stable carbon (δ(13)c) and nitrogen (δ(15)n) isotopes in muscle samples of the following 10 delphinid species: sotalia guianensis, stenella frontalis, tursiops truncatus, steno bredanensis, pseudorca crassidens, delphinus sp., lagenodelphis hosei, stenella attenuata, stenella longirostris and grampus griseus. we also compared the δ(13)c and δ(15)n values among four populations of s. guianensis. variation in ca ... | 2013 | 24358155 |
| contamination by chlorinated pesticides, pcbs and pbdes in atlantic spotted dolphin (stenella frontalis) in western south atlantic. | chlorinated pesticides, pcbs and pbdes were analysed in nine blubber samples of atlantic spotted dolphins, stenella frontalis, incidentally captured during fishing operations in southern and southeastern brazil between 2005 and 2007. the majority of compounds analysed were detected, suggesting widespread contamination over the region. although the samples came from a location far from main coastal industrial areas, the results revealed an influence from such sources. therefore, levels of pcbs (7 ... | 2012 | 22113056 |
| levels of persistent organic pollutants and residual pattern of ddts in small cetaceans from the coast of são paulo, brazil. | the state of são paulo is the most developed area in brazil and was impacted by persistent organic pollutants for several decades. this study investigated organochlorines in five species of small cetaceans (pontoporia blainvillei, stenella frontalis, sotalia guianensis, tursiops truncatus and steno bredanensis) found dead along the coast of são paulo between 1997 and 2003. ddts (15.9 μg g(-1) lipid; mean for all pooled individuals) and pcbs (8.08 μg g(-1)) exhibited the highest concentrations in ... | 2010 | 20699191 |
| hearing loss in stranded odontocete dolphins and whales. | the causes of dolphin and whale stranding can often be difficult to determine. because toothed whales rely on echolocation for orientation and feeding, hearing deficits could lead to stranding. we report on the results of auditory evoked potential measurements from eight species of odontocete cetaceans that were found stranded or severely entangled in fishing gear during the period 2004 through 2009. approximately 57% of the bottlenose dolphins and 36% of the rough-toothed dolphins had significa ... | 2010 | 21072206 |
| assessing disease and mortality among small cetaceans stranded at a world heritage site in southern brazil. | cetaceans are considered environmental sentinels and their health often reflects either anthropogenic or natural spatio-temporal disturbances. this study investigated the pathological findings and mortality of small cetaceans with the aim of detecting hazards and monitoring health trends in a high-biodiversity area. between 2007 and 2012, 218 stranded cetaceans were recorded on the paraná coast, southern brazil. fifty-seven (26.1%) of these animals, including 50 sotalia guianensis, 2 pontoporia ... | 2016 | 26871703 |
| 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 |
| 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 |
| small cetaceans found stranded or accidentally captured in southeastern brazil: bioindicators of essential and non-essential trace elements in the environment. | essential (cu, mn, se and zn) and non-essential (cd and hg) elements were analyzed in the hepatic tissue of 22 individuals of seven different species of small cetaceans (feresa attenuata; orcinus orca; pontoporia blainvillei; sotalia guianensis; stenella frontalis; steno bredanensis; tursiops truncatus) accidentally caught in fishing nets or found stranded along the northern coast of the state of rio de janeiro, brazil, between 2001 and 2010. atlantic spotted dolphin (s. frontalis) showed the hi ... | 2013 | 23993648 |
| nitrogen solubility in odontocete blubber and mandibular fats in relation to lipid composition. | understanding toothed whale (odontocete) diving gas dynamics is important given the recent atypical mass strandings of odontocetes (particularly beaked whales) associated with mid-frequency naval sonar. some stranded whales have exhibited gas emboli (pathologies resembling decompression sickness) in their specialized intramandibular and extramandibular fat bodies used for echolocation and hearing. these tissues have phylogenetically unique, endogenous lipid profiles with poorly understood bioche ... | 2015 | 26290593 |
| organochlorine concentrations (pcbs, ddts, hchs, hcb and mirex) in delphinids stranded at the northeastern brazil. | organochlorine compounds are highly persistent in the environment, causing bioaccumulation and biomagnification through the marine food chain. to verify the bioaccumulation pattern of ddt and its metabolites, as well as pcbs, mirex, hchs and hcb, samples of subcutaneous adipose tissue from 25 guiana dolphins (sotalia guianensis), two fraser's dolphins (lagenodelphis hosei), two spinner dolphins (stenella longirostris), one spotted dolphin (stenella frontalis), and one striped dolphin (stenella c ... | 2014 | 24291562 |
| pbdes in the blubber of marine mammals from coastal areas of são paulo, brazil, southwestern atlantic. | limited information is available in the literature on the levels of brominated flame retardants in the southern hemisphere. this study presents concentrations of polybrominated diphenyl ethers (pbdes) in the blubber of small cetaceans from the coast of são paulo (brazil), southwestern atlantic. pbde levels were highest in stenella frontalis (770 ng g(-1) lipid) followed by steno bredanensis (475 ng g(-1) lipid), sotalia guianensis (65.6 ng g(-1) lipid), tursiopstruncatus (64.2 ng g(-1) lipid) an ... | 2011 | 22014918 |
| radiographic assessment of dental pathology and abnormalities in dolphins. | this study proposes a simple standardized method for the production of analog x-ray images of dolphin teeth, and to explore its potential use as a complementary technique in the evaluation of dental pathology in small cetaceans. we investigated exposure times that produced the best results, and whether radiographs helped in the diagnosis of macroscopic abnormalities. teeth of six species of dolphins (delphinidae: tursiops truncatus, steno bredanensis, sotalia guianensis, delphinus sp., stenella ... | 2017 | 28770682 |
| whistle comparison of four delphinid species in southeastern brazil. | the present study evaluates variations in frequency and duration parameters of whistles of four dolphin species (sotalia guianensis, steno bredanensis, stenella frontalis, and tursiops truncatus), recorded in the rio de janeiro state coast, southeastern brazil. a total of 487 whistles were analyzed. acoustic parameters of the whistles were classified to species by discriminant function analysis. overall classification score was 72.5%, with the highest classification score obtained for whistles o ... | 2016 | 27250196 |
| on the panniculus carnosus of the bridled dolphin (stenella frontalis). | | 1971 | 5142550 |
| exodus! large-scale displacement and social adjustments of resident atlantic spotted dolphins (stenella frontalis) in the bahamas. | over the last 20 years, significant habitat shifts have been documented in some populations of cetaceans. on little bahama bank (lbb) there are sympatric communities of resident atlantic spotted dolphins (stenella frontalis) and bottlenose dolphins (tursiops truncatus), monitored since 1985. the size and social structure (three clusters: northern, central, southern) have been stable among the spotted dolphin community with little immigration/emigration, even after large demographic losses (36%) ... | 2017 | 28792947 |
| uterine leiomyoma and prolapse in a live-stranded atlantic spotted dolphin (stenella frontalis). | a uterine prolapse associated with a leiomyoma (fibroid) was observed in a live-stranded atlantic spotted dolphin (stenella frontalis). a 7 cm segment of the reproductive tract including the cervix, uterine neck and caudal uterine body had intussuscepted and prolapsed into the cranial vaginal vault. in the leading edge of the intussuscepted/prolapsed uterine wall was a 6 × 3 × 3.5 cm leiomyoma expanding the myometrium. the leiomyoma and prolapse were associated with necrotizing exposure endometr ... | 2015 | 25979681 |
| primary uterine t-cell lymphoma with metastasis in an atlantic spotted dolphin (stenella frontalis), canary islands, spain. | we describe gross, histopathologic, and immunonocytologic features of a primary uterine t-cell lymphoma with multiple metastases in an adult female atlantic spotted dolphin (stenella frontalis). neoplastic t-cell lymphocytes (cd3+) partially effaced the uterus, ovaries, mesosalpinx, and urinary bladder and variably infiltrated abdominal and thoracic organs. herpesvirus and morbillivirus pcr were negative. | 2015 | 25855862 |
| single-click beam patterns suggest dynamic changes to the field of view of echolocating atlantic spotted dolphins (stenella frontalis) in the wild. | echolocating animals exercise an extensive control over the spectral and temporal properties of their biosonar signals to facilitate perception of their actively generated auditory scene when homing in on prey. the intensity and directionality of the biosonar beam defines the field of view of echolocating animals by affecting the acoustic detection range and angular coverage. however, the spatial relationship between an echolocating predator and its prey changes rapidly, resulting in different b ... | 2015 | 25767147 |
| high-grade astrocytoma (glioblastoma multiforme) in an atlantic spotted dolphin (stenella frontalis). | this report describes the gross, microscopical and immunohistochemical features of a high-grade astrocytoma (glioblastoma multiforme) in an adult male atlantic spotted dolphin (stenella frontalis). on necropsy examination, a 5 × 2.5 × 2 cm, poorly demarcated, red, friable and locally expansile mass effaced the thalamus and the left periventricular region and extended to the left lateral ventricle of the brain. microscopically, the mass consisted of haphazardly arranged bundles and rows of interw ... | 2015 | 25728810 |
| molecular assessment of mating strategies in a population of atlantic spotted dolphins. | similar to other small cetacean species, atlantic spotted dolphins (stenella frontalis) have been the object of concentrated behavioral study. although mating and courtship behaviors occur often and the social structure of the population is well-studied, the genetic mating system of the species is unknown. to assess the genetic mating system, we genotyped females and their progeny at ten microsatellite loci. genotype analysis provided estimates of the minimum number of male sires necessary to ac ... | 2015 | 25692972 |
| mercury in caribbean dolphins (stenella longirostris and stenella frontalis) caught for human consumption off st. vincent, west indies. | the island of st. vincent in the lesser antilles supports an ongoing, legal cetacean hunt, which targets several species for human consumption. little is known regarding the healthfulness and potential health risks of these foods in this setting. following established methodologies we analyzed 39 raw muscle tissue samples and 38 raw blubber samples from two cetacean species for total mercury and methyl-mercury. we also analyzed samples of muscle tissue from an unknown cetacean species prepared f ... | 2014 | 25455368 |
| hierarchical population structure and habitat differences in a highly mobile marine species: the atlantic spotted dolphin. | recent molecular studies have shown that highly mobile species with continuous distributions can exhibit fine-scale population structure. in this context, we assessed genetic structure within a marine species with high dispersal potential, the atlantic spotted dolphin (stenella frontalis). using 19 microsatellite loci and mitochondrial control region sequences, population structure was investigated in the western north atlantic, the gulf of mexico and the azores islands. analyses of the microsat ... | 2014 | 25256360 |
| whistle source levels of free-ranging bottlenose dolphins and atlantic spotted dolphins in the gulf of mexico. | whistles of bottlenose dolphins (tursiops truncatus) and atlantic spotted dolphins (stenella frontalis) in the eastern gulf of mexico were recorded and measured with a calibrated towed hydrophone array. surveys encountered groups of both bottlenose (n = 10) and spotted dolphins (n = 5). analysis of those data produced 1695 bottlenose dolphin whistles and 1273 spotted dolphin whistles with a high signal-to-noise ratio. whistle frequency metrics were lower in bottlenose than spotted dolphins, whil ... | 2014 | 24606297 |
| the occurrence of mtdna heteroplasmy in multiple cetacean species. | in population genetics and phylogenetic studies, mitochondrial dna (mtdna) is commonly used for examining differences both between and within groups of individuals. for these studies, correct interpretation of every nucleotide position is crucial but can be complicated by the presence of ambiguous bases resulting from heteroplasmy. particularly for non-model taxa, the presence of heteroplasmy in mtdna is rarely reported, therefore, it is unclear how commonly it occurs and how it can affect phylo ... | 2011 | 21234756 |
| whistles emitted by atlantic spotted dolphins (stenella frontalis) in southeastern brazil. | the whistles of atlantic spotted dolphins have been studied in a few localities of the north atlantic ocean and those studies revealed that the species emits whistles within a broad frequency range, with a high number of inflection points and presence of harmonics. in the south atlantic ocean, there is no information about the sounds produced by atlantic spotted dolphins. a total of 1092 whistles emitted by free-ranging atlantic spotted dolphins in southeastern brazilian coastal waters were anal ... | 2010 | 20370045 |
| evidence of teaching in atlantic spotted dolphins (stenella frontalis) by mother dolphins foraging in the presence of their calves. | teaching is a powerful form of social learning, but there is little systematic evidence that it occurs in species other than humans. using long-term video archives the foraging behaviors by mother atlantic spotted dolphins (stenella frontalis) were observed when their calves were present and when their calves were not present, including in the presence of non-calf conspecifics. the nine mothers we observed chased prey significantly longer and made significantly more referential body-orienting mo ... | 2009 | 18663496 |
| 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 |
| cytopathology induced by mercuric chloride and methylmercury in cultured renal cells of the atlantic spotted dolphin (stenella plagiodon). | high mercury concentrations have been reported in various tissues of cetaceans, but the toxicological effects of mercury on cetaceans remain unclear. in vivo study is difficult due to the endangered status of these marine mammals and co-exposure to both mercury and selenium (antagonist of mercury) in the oceanic environment. the present data are the first ultrastructural information on dolphin renal cells exposed to mercury in vitro. multiple organelle changes were observed in atlantic spotted d ... | 2013 | 11686411 |
| protective effects of selenium against mercury toxicity in cultured atlantic spotted dolphin (stenella plagiodon) renal cells. | marine mammals are known for their low susceptibility to mercury toxicity, and selenium may play a role in this protection against mercury intoxication. to gain insight into mechanisms by which selenium might inhibit mercury toxicity in cetacean cells, we investigated the effects of sodium selenite on cell proliferation and cell death (including apoptosis, oncosis, and necrosis) of control and mercuric chloride-treated atlantic spotted dolphin renal cells (sp1k cells). concurrent exposure to 80 ... | 2001 | 11598777 |
| functional and ultrastructural cell pathology induced by fuel oil in cultured dolphin renal cells. | investigations were undertaken to elucidate in a marine mammal renal cell culture system the toxicity and some of the mechanisms of cytopathology in a standardized preparation following exposure to no. 1 fuel oil. cell survivability of a cultured sp1k renal cell line from the atlantic spotted dolphin stenella plagiodon was reduced in a dose-dependent manner after a 12-h exposure to fuel oil. early morphologic changes reflecting cytotoxicity, as revealed by transmission electron microscopy, inclu ... | 2000 | 11023700 |