| vanadium accumulation in pinnipeds. | vanadium in four species of pinnipeds (northern fur seals [callorhinus ursinus], steller sea lions [eumetopias jubatus], harbor seals [phoca vitulina], and ribbon seals [phoca fasciata]) caught in the northern pacific was analyzed using icp-ms to understand its accumulation and distribution. in northern fur seals, relatively high concentrations of vanadium were observed in the liver, hair, and bone. ninety percent of the vanadium burden in the body was concentrated in these three tissues, which ... | 1999 | 9828265 |
| identification of novel cytochrome p450 1a genes from five marine mammal species. | marine mammals, being endangered by the chronic exposure of hydrophobic environmental contaminants as an assorting result of global pollution, are especially focused as indicators for organochlorine pollution. the use of contaminant-induced xenobiotic metabolizers, particularly p450 (cyp) 1a, in marine mammals can be effective as potential biomarkers of the contaminant exposure and/or toxic effects. in this study, we identified the first marine mammalian cyps. six novel cyp1a cdna fragments were ... | 2000 | 11064121 |
| negative correlation between plasma thyroid hormone levels and chlorinated hydrocarbon levels accumulated in seals from the coast of hokkaido, japan. | chlorinated hydrocarbon (chc) levels in the blubber of larga seals (phoca largha) and ribbon seals (phoca fasciata) collected from the coastal waters of hokkaido, japan, were determined in order to assess the hormonal effects of chc exposure in free-ranging pinnipeds. plasma thyroid hormone levels, including total thyroxine (t4), free thyroxine (free t4), total triiodothyronine (t3), and free triiodothyronine (free t3), were also measured. higher concentrations of polychlorinated biphenyl congen ... | 2001 | 11337873 |
| hepatic microsomal cytochrome p450s and chlorinated hydrocarbons in largha and ribbon seals from hokkaido, japan: differential response of seal species to ah receptor agonist exposure. | from 16 largha seals (phoca largha) and 15 ribbon seals (phoca fasciata) in the coastal waters of hokkaido, japan, blubber chlorinated hydrocarbon (chc) levels and hepatic cytochrome p450 (cyp) catalytic activities and their immunochemically detected protein content levels were measured. concentrations of ddts (2,2-bis(4-chlorophenyl)-1,1-dichloroethylene,p,p'-dde; 2,2-bis(4-chlorophenyl)-1,1-dichloroethane, p,p'-ddd; dichlorodiphenyltrichloroethane, p,p'-ddt), polychlorinated biphenyl congeners ... | 2002 | 11951954 |
| toxoplasma gondii, neospora caninum, sarcocystis neurona, and sarcocystis canis-like infections in marine mammals. | toxoplasma gondii, neospora caninum, sarcocystis neurona, and s. canis are related protozoans that can cause mortality in many species of domestic and wild animals. recently, t. gondii and s. neurona were recognized to cause encephalitis in marine mammals. as yet, there is no report of natural exposure of n. caninum in marine mammals. in the present study, antibodies to t. gondii and n. caninum were assayed in sera of several species of marine mammals. for t. gondii, sera were diluted 1:25, 1:50 ... | 2003 | 14580799 |
| seroepidemiology of toxoplasma gondii and neospora caninum in seals around hokkaido, japan. | serological analysis was performed to detect toxoplasma gondii and neospora caninum infection in seals in hokkaido. serum samples were collected from 322 kuril harbor seals (phoca vitulina stejnegeri) at nosappu, akkeshi and erimo, from 46 spotted seals (p. largha) at nosappu, erimo, yagishiri island, hamamasu and syakotan, and from 4 ribbon seals (p. fasciata) and a bearded seal (erignathus barbatus) at nosappu between 1998 and 2006. recombinant surface antigen of t. gondii (sag2t) and n. canin ... | 2007 | 17485927 |
| serologic evidence of brucella infection in pinnipeds along the coast of hokkaido, the northernmost main island of japan. | brucella infection in hokkaido was serologically surveyed in four species of pinnipeds inhabiting cape erimo during 2008-2013 and the shiretoko peninsula in 1999, by enzyme-linked immunosorbent assay using brucella abortus and b. canis as antigens. anti-brucella positive sera showed higher absorbance to b. abortus than b. canis in almost all samples. anti-b. abortus antibodies were detected in serum samples from 24% (n=55) of western pacific harbor seals (phoca vitulina stejnegeri) in cape erimo ... | 2017 | 28262966 |
| the use of non destructive biomarkers in the study of marine mammals. | marine mammals have been subject to heavy anthropogenic pressure by direct killing and chemical pollution all over the world. most studies of contamination and biomarker responses in marine mammals have been conducted using animals killed by hunting out of a total of 12 cetacean species studied, 45 of the specimens were obtained by sacrificing the animal; out of a total of eight pinniped species studied, 40 of the specimens were obtained by killing. the development of a series of non destructive ... | 1997 | 23899212 |
| halogenated phenolic contaminants in the blood of marine mammals from japanese coastal waters. | information on accumulation of halogenated phenolic contaminants in the blood of marine mammal is limited. the present study, we determined the residue levels and patterns of chlorinated and brominated phenolic contaminants (oh-pcbs, oh-pbdes and bromophenols) in the blood collected from pinnipeds (northern fur seal, spotted seal, steller sea lion and ribbon seal) and small cetaceans (harbor porpoise and dall's porpoise) from japanese coastal waters. concentrations of pcbs and oh-pcbs found in p ... | 2014 | 24060385 |
| carbon sources and trophic relationships of ice seals during recent environmental shifts in the bering sea. | dramatic multiyear fluctuations in water temperature and seasonal sea ice extent and duration across the bering-chukchi continental shelf have occurred in this century, raising a pressing ecological question: do such environmental changes alter marine production processes linking primary producers to upper trophic-level predators? we examined this question by comparing the blubber fatty acid (fa) composition and stable carbon isotope ratios of individual fa (δ¹³cfa) of adult ringed seals (pusa h ... | 2016 | 27411254 |
| nasal mites (acari:halarachnidae) in the spotted seal, phoca largha pallas, and other pinnipeds of alaskan waters. | the nasal passages of 349 pinnipeds of seven species were examined for halarachnid mites. each of seven steller sea lions (eumetopias jubatus), 75 of 99 harbor seals (phoca vitulina), and four of 71 spotted seals (p. largha) were infected, but none of 28 walruses (odobenus rosmarus), 43 ringed seals (phoca hispida), 58 ribbon seals (p. fasciata), and 43 bearded seals (erignathus barbatus) was infected. the sea lions harbored orthohalarachne attenuata (banks, 1910) and o. diminuata (doetschman, 1 ... | 1982 | 7097872 |
| prevalence of algal toxins in alaskan marine mammals foraging in a changing arctic and subarctic environment. | current climate trends resulting in rapid declines in sea ice and increasing water temperatures are likely to expand the northern geographic range and duration of favorable conditions for harmful algal blooms (habs), making algal toxins a growing concern in alaskan marine food webs. two of the most common hab toxins along the west coast of north america are the neurotoxins domoic acid (da) and saxitoxin (stx). over the last 20 years, da toxicosis has caused significant illness and mortality in m ... | 2016 | 28073526 |
| immunohistochemical localization of steroidogenic enzymes in the corpus luteum and the placenta of the ribbon seal (phoca fasciata) and steller sea lion (eumetopias jubatus). | to study the luteal and placental function of pinnipeds, we analyzed the localization of steroidogenic enzymes (p450scc, 3 beta hsd and p450arom) in the corpus luteum and the placenta of ribbon seals (phoca fasciata) and steller sea lions (eumetopias jubatus) immunohistochemically. p450scc and 3 beta hsd were present in all luteal cells of both species. almost all of the luteal cells were immunostained for p450arom, while p450scc and 3 beta hsd were negatively immunostained in placentae and p450 ... | 2001 | 11642282 |
| the commercial harvest of ice-associated seals in the sea of okhotsk, 1972-1994. | sealing log books from 75 out of 79 commercial harvest cruises carried out between 1972 and 1994 in the sea of okhotsk, russia, were analyzed to describe spatial and temporal allocation of ice-associated seal harvest effort, species composition of catches, total harvest rates, and related parameters for species including ringed (pusa hispida), ribbon (histriophoca fasciata), bearded (erignathus barbatus) and spotted (phoca largha) seal. variations in catch per unit effort were explored in relati ... | 2017 | 28796843 |
| on extrapolating past the range of observed data when making statistical predictions in ecology. | ecologists are increasingly using statistical models to predict animal abundance and occurrence in unsampled locations. the reliability of such predictions depends on a number of factors, including sample size, how far prediction locations are from the observed data, and similarity of predictive covariates in locations where data are gathered to locations where predictions are desired. in this paper, we propose extending cook's notion of an independent variable hull (ivh), developed originally f ... | 2015 | 26496358 |
| perfluorinated contaminants in ringed, bearded, spotted, and ribbon seals from the alaskan bering and chukchi seas. | | 2008 | 18656906 |
| polybrominated diphenyl ether compounds in ringed, bearded, spotted, and ribbon seals from the alaskan bering sea. | | 2007 | 17169381 |
| separation and characterization of metallothionein in two species of seals by high performance liquid chromatography-atomic absorption spectrophotometry. | metallothionein (mt) was separated from the livers of two species of seals, ribbon seal (histriophoca fasciata) and harbour seal (phoca vitulina), by high performance liquid chromatography--atomic absorption spectrophotometry (hplc-aas). both gel permeation and anion-exchange hplc demonstrated that mt was present as a mixture of at least two isoforms in the livers of both species of seals. | 1985 | 2866896 |
| comparative health assessments of alaskan ice seals. | bearded (erignathus barbatus), ringed (pusa hispida), spotted (phoca largha), and ribbon (histriophoca fasciata) seals rely on seasonal sea-ice in arctic and sub-arctic regions. many aspects of the biology and physiology of these seals are poorly known, and species-typical health parameters are not available for all species. such information has proven difficult to obtain due to the challenges of studying arctic seals in the wild and their minimal historic representation in aquaria. here, we com ... | 2019 | 30792982 |
| brucella antibodies in alaskan true seals and eared seals-two different stories. | brucella pinnipedialis was first isolated from true seals in 1994 and from eared seals in 2008. although few pathological findings have been associated with infection in true seals, reproductive pathology including abortions, and the isolation of the zoonotic strain type 27 have been documented in eared seals. in this study, a brucella enzyme-linked immunosorbent assay (elisa) and the rose bengal test (rbt) were initially compared for 206 serum samples and a discrepancy between the tests was fou ... | 2018 | 29445729 |
| helminth fauna of ice seals in the alaskan bering and chukchi seas, 2006-15. | climate warming may affect the distribution of helminth parasites, allowing endemic species to increase in prevalence and new species to appear. we analyzed tissues from 141 ice-associated seals collected in the alaskan bering and chukchi seas during 2006-15 for internal helminth parasites and compared results with past studies. specimens were collected from: ringed seals (pusa hispida), bearded seals (erignathus barbatus), spotted seals (phoca largha), and ribbon seals (histriophoca fasciata).h ... | 2020 | 32502360 |
| genomic characterization of picornaviruses isolated from ribbon (histriophoca fasciata) and harbor (phoca vitulina) seals. | the seal picornavirus 1, species aquamavirus a, is currently the only recognized member of the genus aquamavirus within the family picornaviridae. the bear picornavirus 1 was recently proposed as the second species in the genus under the name aquamavirus b. herein, we determined the complete genomes of two novel pinniped picornaviruses, the harbor seal picornavirus (hspv) and the ribbon seal picornavirus (rspv). the hspv and the rspv were isolated in vero.dogslamtag cells from samples collected ... | 2020 | 33195526 |