Scientist, Paul Hershberger, at the Marrowstone Marine Field Station in Washington
Detailed Description
This is a photo of Paul Hershberger at Marrowstone Marine Field Station Lab. Dr. Hershberger studies diseases in fish.
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Public Domain.
Related
Low productivity of Chinook salmon strongly correlates with high summer stream discharge in two Alaskan rivers in the Yukon drainage Low productivity of Chinook salmon strongly correlates with high summer stream discharge in two Alaskan rivers in the Yukon drainage
Yukon River Chinook salmon (Oncorhynchus tshawytscha) populations are declining for unknown reasons, creating hardship for thousands of stakeholders in subsistence and commercial fisheries. An informed response to this crisis requires understanding the major sources of variation in Chinook salmon productivity. However, simple stock–recruitment models leave much of the variation in this...
Authors
Jason Neuswanger, Mark Wipfli, Matthew Evenson, Nicholas Hughes, Amanda Rosenberger
Differences in Ichthyophonus prevalence and infection severity between upper Yukon River and Tanana River chinook salmon, Oncorhynchus tshawytscha (Walbaum), stocks Differences in Ichthyophonus prevalence and infection severity between upper Yukon River and Tanana River chinook salmon, Oncorhynchus tshawytscha (Walbaum), stocks
Two genetically distinct populations of chinook salmon, Oncorhynchus tshawytscha (Walbaum), were simultaneously sampled at the confluence of the Yukon and Tanana rivers in 2003. Upper Yukon-Canadian fish had significantly higher infection prevalence as well as more severe infections (higher parasite density in heart tissue) than the lower Yukon-Tanana River fish. Both populations had...
Authors
R. Kocan, P. Hershberger
Ichthyophoniasis: An emerging disease of Chinook salmon in the Yukon River Ichthyophoniasis: An emerging disease of Chinook salmon in the Yukon River
Before 1985, Ichthyophonus was unreported among Pacific salmon Oncorhynchus spp. from the Yukon River; now it infects more than 40% of returning adult Chinook salmon O. tshawytscha. Overall infection prevalence reached about 45% in the Yukon River and about 30% in the Tanana River between 1999 and 2003. Mean infection prevalence was greater in females than males in the main-stem Yukon...
Authors
R. Kocan, P. Hershberger, J. Winton
Effects of Ichthyophonus on survival and reproductive success of Yukon River Chinook salmon. Final report for study 01-200 Effects of Ichthyophonus on survival and reproductive success of Yukon River Chinook salmon. Final report for study 01-200
No abstract available
Authors
R. Kocan, P. Hershberger, J. Winton
Related
Low productivity of Chinook salmon strongly correlates with high summer stream discharge in two Alaskan rivers in the Yukon drainage Low productivity of Chinook salmon strongly correlates with high summer stream discharge in two Alaskan rivers in the Yukon drainage
Yukon River Chinook salmon (Oncorhynchus tshawytscha) populations are declining for unknown reasons, creating hardship for thousands of stakeholders in subsistence and commercial fisheries. An informed response to this crisis requires understanding the major sources of variation in Chinook salmon productivity. However, simple stock–recruitment models leave much of the variation in this...
Authors
Jason Neuswanger, Mark Wipfli, Matthew Evenson, Nicholas Hughes, Amanda Rosenberger
Differences in Ichthyophonus prevalence and infection severity between upper Yukon River and Tanana River chinook salmon, Oncorhynchus tshawytscha (Walbaum), stocks Differences in Ichthyophonus prevalence and infection severity between upper Yukon River and Tanana River chinook salmon, Oncorhynchus tshawytscha (Walbaum), stocks
Two genetically distinct populations of chinook salmon, Oncorhynchus tshawytscha (Walbaum), were simultaneously sampled at the confluence of the Yukon and Tanana rivers in 2003. Upper Yukon-Canadian fish had significantly higher infection prevalence as well as more severe infections (higher parasite density in heart tissue) than the lower Yukon-Tanana River fish. Both populations had...
Authors
R. Kocan, P. Hershberger
Ichthyophoniasis: An emerging disease of Chinook salmon in the Yukon River Ichthyophoniasis: An emerging disease of Chinook salmon in the Yukon River
Before 1985, Ichthyophonus was unreported among Pacific salmon Oncorhynchus spp. from the Yukon River; now it infects more than 40% of returning adult Chinook salmon O. tshawytscha. Overall infection prevalence reached about 45% in the Yukon River and about 30% in the Tanana River between 1999 and 2003. Mean infection prevalence was greater in females than males in the main-stem Yukon...
Authors
R. Kocan, P. Hershberger, J. Winton
Effects of Ichthyophonus on survival and reproductive success of Yukon River Chinook salmon. Final report for study 01-200 Effects of Ichthyophonus on survival and reproductive success of Yukon River Chinook salmon. Final report for study 01-200
No abstract available
Authors
R. Kocan, P. Hershberger, J. Winton