| detection and characterization of diverse coccidian protozoa shed by california sea lions. | tissue-cyst forming coccidia in the family sarcocystidae are etiologic agents of protozoal encephalitis in marine mammals including the federally listed southern sea otter (enhydra lutris). california sea lions (zalophus californianus), whose coastal habitat overlaps with sea otters, are definitive hosts for coccidian protozoa provisionally named coccidia a, b and c. while coccidia a and b have unknown clinical effects on aquatic wildlife hosts, coccidia c is associated with severe protozoal dis ... | 2016 | 27141438 |
| impact of the 2015 el niño-southern oscillation on the abundance and foraging habits of guadalupe fur seals and california sea lions from the san benito archipelago, mexico. | the abundance of california sea lions (zalophus californianus) (csls) and guadalupe fur seals (arctocephalus philippii townsendi) (gfss) from the san benito archipelago (sba) was determined through nine monthly surveys in 2014-2015. assessment of their foraging habits was examined based on the isotopic analysis of pups (maternal indicators) (siar/siber-r). environmental variability between 2014 and 2015 was also analyzed, in terms of sea surface temperature (sst) and chlorophyll (chl-a) concentr ... | 2016 | 27171473 |
| colony-level assessment of brucella and leptospira in the guadalupe fur seal, isla guadalupe, mexico. | the relatively small population size and restricted distribution of the guadalupe fur seal arctocephalus townsendi could make it highly vulnerable to infectious diseases. we performed a colony-level assessment in this species of the prevalence and presence of brucella spp. and leptospira spp., pathogenic bacteria that have been reported in several pinniped species worldwide. forty-six serum samples were collected in 2014 from pups at isla guadalupe, the only place where the species effectively r ... | 2017 | 28117297 |
| genetic consequences of a severe population bottleneck in the guadalupe fur seal (arctocephalus townsendi). | population bottlenecks may lead to diminished genetic variability and correlative effects on fitness. the guadalupe fur seal was nearly exterminated by commercial sealers during the late 18th and early 19th centuries. to determine the genetic consequences of this population bottleneck, we compared the variation at a 181 bp section of the mitochondrial dna (mtdna) control region from the bones of 26 prebottleneck fur seals versus variation in the extant population. we found 25 different mtdna gen ... | 2008 | 15073230 |
| genetic variability in guadalupe fur seals. | the guadalupe fur seal (arctocephalus townsendi) population underwent one or two severe bottlenecks due to commercial sealing in the late 19th century. since then the protected population has been growing steadily around their only rookery, isla de guadalupe, mexico. we probed both nuclear and mitochondrial genomes using multilocus nuclear dna profiling and mitochondrial dna sequencing to estimate the level of genetic variability of the present population. unlike other pinniped populations that ... | 2008 | 9703686 |
| findings in pinnipeds stranded along the central and northern california coast, 1984-1990. | personnel at the marine mammal center (the center) treated 1,446 stranded marine mammals recovered from the central and northern california (usa) coast from 1984 through 1990, including california sea lions (zalophus californianus), northern elephant seals (mirounga angustirostris), pacific harbor seals (phoca vitulina richardsi), northern fur seals (callorhinus ursinus), steller sea lions (eumetopias jubatus), and guadalupe fur seals (arctocephalus townsendi). the primary disease findings in st ... | 1993 | 8355344 |
| characterization of progressive keratitis in otariids. | to characterize a form of progressive keratitis that occurs commonly in otariids. | 2010 | 20840090 |
| vasculitis and thrombosis due to the sea lion lungworm, parafilaroides decorus, in a guadalupe fur seal ( arctocephalus philippii townsendi). | a free-ranging, male, yearling guadalupe fur seal ( arctocephalus philippii townsendi) died due to multifocal verminous vasculitis with thrombosis and several embolic infarcts in liver, kidney, and brain. nematodes extracted from lung blood vessels were identified as parafilaroides decorus, a parasite normally found in alveoli of california sea lions ( zalophus californianus). | 2018 | 29715062 |
| isotopic variation in blood components based on their biochemistry and physiology: a comparison between sharks and fur seals. | research using stable isotopes analysis (sia) of carbon (δ13 c) and nitrogen (δ15 n) in blood components is lacking, because of the challenge of sample collection, processing, and storage in remote areas. there also is a paucity of information regarding the effect of tissue biochemical composition on isotopic ratios with few comparisons among taxa. we collected blood samples from shortfin mako sharks (n = 70; 2016) and guadalupe fur seals (n = 25; 2017). all samples were centrifuged to obtain pl ... | 2020 | 31709773 |