| distinguishing the impacts of inadequate prey and vessel traffic on an endangered killer whale (orcinus orca) population. | managing endangered species often involves evaluating the relative impacts of multiple anthropogenic and ecological pressures. this challenge is particularly formidable for cetaceans, which spend the majority of their time underwater. noninvasive physiological approaches can be especially informative in this regard. we used a combination of fecal thyroid (t3) and glucocorticoid (gc) hormone measures to assess two threats influencing the endangered southern resident killer whales (srkw; orcinus o ... | 2012 | 22701560 |
| brain acetylcholinesterase activity in shiner perch (cymatogaster aggregata) and juvenile chinook salmon (oncorhynchus tshawytscha) after application of carbaryl to control burrowing shrimp within willapa bay, washington. | carbaryl has been applied in willapa bay, washington, for five decades to control burrowing shrimp (neotrypaea californiensis and upogebia pugettensis) on commercial oyster (crassostrea gigas) beds. concerns about effects on nontarget species, including fishes, have led to restrictions in use despite a lack of data on in situ exposure. we measured brain acetylcholinesterase (ache) activity in adult shiner perch (cymatogaster aggregata) and juvenile chinook salmon (oncorhynchus tshawytscha) after ... | 2013 | 24042340 |
| genetic variation in bacterial kidney disease (bkd) susceptibility in lake michigan chinook salmon and its progenitor population from the puget sound. | mass mortality events in wild fish due to infectious diseases are troubling, especially given the potential for long-term, population-level consequences. evolutionary theory predicts that populations with sufficient genetic variation will adapt in response to pathogen pressure. chinook salmon oncorhynchus tshawytscha were introduced into lake michigan in the late 1960s from a washington state hatchery population. in the late 1980s, collapse of the forage base and nutritional stress in lake michi ... | 2014 | 24689954 |
| 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 ... | 2015 | 24720546 |
| decreased mortality of lake michigan chinook salmon after bacterial kidney disease challenge: evidence for pathogen-driven selection? | in the late 1960s, chinook salmon oncorhynchus tshawytscha from the green river, washington, were successfully introduced into lake michigan. during spring from 1988 to 1992, large fish die-offs affecting chinook salmon occurred in the lake. multiple ecological factors probably contributed to the severity of the fish kills, but the only disease agent found regularly was renibacterium salmoninarum, the causative agent of bacterial kidney disease. in this study, survival after challenge by r. salm ... | 2008 | 19306612 |
| prevalence and analysis of renibacterium salmoninarum infection among juvenile chinook salmon oncorhynchus tshawytscha in north puget sound. | renibacterium salmoninarum causes bacterial kidney disease (bkd), a chronic and sometimes fatal disease of salmon and trout that could lower fitness in populations with high prevalences of infection. prevalence of r. salmoninarum infection among juvenile chinook salmon oncorhynchus tshawytscha inhabiting neritic marine habitats in north puget sound, washington, usa, was assessed in 2002 and 2003. fish were collected by monthly surface trawl at 32 sites within 4 bays, and kidney infections were d ... | 2006 | 17058599 |
| polychlorinated biphenyl concentrations in adult chinook salmon (oncorhynchus tshawytscha) returning to coastal and puget sound hatcheries of washington state. | identifying the source of polychlorinated biphenyls (pcbs) is the first step to eliminating contamination within anadromous salmonids and other aquatic species. we evaluated pcb concentrations in the muscle tissue of 4-year old puget sound and coastal hatchery chinook salmon in an effortto identify potential locations where contamination occurs. ten muscle samples were taken from each of two puget sound hatcheries and two coastal hatcheries in washington state to determine pcb concentrations. tw ... | 2005 | 16201615 |
| prevalence of larval anisakis simplex in pen-reared and wild-caught salmon (salmonidae) from puget sound, washington. | the abundance of parasites of public health significance in pen-reared salmon and wild-caught salmon was compared. two hundred eighty-seven salmon from puget sound, washington, were examined for third-stage larvae of anisakis simplex. of these fish, 237 atlantic salmon (salmo salar), coho salmon (oncorhynchus kisutch) and chinook salmon (o. tshawytscha) were reared in commercial salmon pens and 50 sockeye salmon (o. nerka) were caught during their spawning migration. all wild-caught salmon were ... | 1989 | 2761015 |
| failure of vaccines to protect salmon from vibriosis enzootic in puget sound, washington. | juvenile chinook salmon in fresh water were vaccinated either orally or parenterally with heat- or formalin-killed bacterins prepared with vibrio anguillarum. subsequent exposure to naturally occuring vibriosis in the marine waters of puget sound (washington state) indicated that no protection resulted. it was demonstrated, however, that protection could be achieved with the passive transfer of immune serum. | 1976 | 937795 |