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Diseases of Aquatic Organisms

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DAO 128:169-173 (2018)  -  DOI:

Ichthyophonus in sport-caught groundfishes from southcentral Alaska

Bradley P. Harris1,*, Sarah R. Webster1, Nathan Wolf1, Jacob L. Gregg2, Paul K. Hershberger2

1Alaska Pacific University, Fisheries Aquatic Science and Technology (FAST) Laboratory, 4101 University Drive, Anchorage, AK 99508, USA
2US Geological Survey, Western Fisheries Research Center, Marrowstone Marine Field Station, 616 Marrowstone Point Road, Nordland, WA 98358, USA
*Corresponding author:

ABSTRACT: This report of Ichthyophonus in common sport-caught fishes throughout the marine waters of southcentral Alaska represents the first documentation of natural Ichthyophonus infections in lingcod Ophiodon elongates and yelloweye rockfish Sebastes ruberrimus. In addition, the known geographic range of Ichthyophonus in black rockfish S. melanops has been expanded northward to include southcentral Alaska. Among all species surveyed, the infection prevalence was highest (35%, n = 334) in Pacific halibut Hippoglossus stenolepis. There were no gross indications of high-level infections or clinically diseased individuals. These results support the hypothesis that under typical conditions Ichthyophonus can occur at high infection prevalence accompanied with low-level infection among a variety of fishes throughout the eastern North Pacific Ocean, including southcentral Alaska.

KEY WORDS: Ichthyophonus · Pacific halibut · Lingcod · Rockfish · Pacific cod · Alaska

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Cite this article as: Harris BP, Webster SR, Wolf N, Gregg JL, Hershberger PK (2018) Ichthyophonus in sport-caught groundfishes from southcentral Alaska. Dis Aquat Org 128:169-173.

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