persistence of infection by metacercariae of apophallus sp., neascus sp., and nanophyetus salmincola plus two myxozoans (myxobolus insidiosus and myxobolus fryeri) in coho salmon oncorhynchus kisutch.we evaluated the ability of 5 muscle- or skin-dwelling parasites to persist in naturally infected coho salmon, oncorhynchus kisutch, from the west fork smith river, oregon, by holding them in captivity from late summer to early spring (parr stage to the typical time of smoltification). these parasites included metacercariae of 3 digeneans, nanophyetus salmincola, apophallus sp., and neascus sp., and 2 myxozoans, myxobolus insidiosus and myxobolus fryeri. two groups of wild-caught fish were evalu ...201019954261
infections by renibacterium salmoninarum and nanophyetus salmincola chapin are associated with reduced growth of juvenile chinook salmon, oncorhynchus tshawytscha (walbaum), in the northeast pacific ocean.we examined 1454 juvenile chinook salmon, oncorhynchus tshawytscha (walbaum), captured in nearshore waters off the coasts of washington and oregon (usa) from 1999 to 2004 for infection by renibacterium salmoninarum, nanophyetus salmincola chapin and skin metacercariae. the prevalence and intensities for each of these infections were established for both yearling and subyearling chinook salmon. two metrics of salmon growth, weight residuals and plasma levels of insulin-like growth factor-1, were ...201524720546
survey of parasites in threatened stocks of coho salmon (oncorhynchus kisutch) in oregon by examination of wet tissues and histology.abstract we are conducting studies on the impacts of parasites on oregon coastal coho salmon (oncorhynchus kistuch). an essential first step is documenting the geographic distribution of infections, which may be accomplished by employing different methods for parasite detection. thus, the objectives of the current study were: (1) identify parasite species infecting these stocks of coho salmon and document their prevalence, density, and geographic distribution; (2) assess the pathology of these i ...201121668345
parasites and associated pathology observed in pinnipeds stranded along the oregon coast.forty-two seals and sea lions found dead along the oregon coast were examined for parasites and associated pathology. nematode infections of the lung and/or gastrointestinal tract were the primary cause of death in 5 of 42 animals examined. new distribution records were established for pricetrema zalophi and zalophotrema hepaticum. new host records include z. hepaticum and diphyllobothrium cordatum in the steller's sea lion (eumetopias jubatus); nanophyetus salmincola in the california sea lion ...1978567698
Displaying items 1 - 4 of 4