Impacts of Introduced Alaskan Blackfish (Dallia pectoralis)
Автор: Mat-Su Basin Salmon Habitat Partnership
Загружено: 2022-12-06
Просмотров: 556
Alaska Blackfish (Dallia pectoralis) have become an introduced species of concern where they have been introduced in Southcentral Alaska. Previous studies focused on introduced blackfish diet suggest significant dietary overlap exists between blackfish and native fish species. This dietary overlap, coupled with the blackfish’ unique physiological adaptations, have raised concerns that introduced populations of blackfish may have a negative impact on native fish assemblages. This study sought to quantify the effects of an introduced population of blackfish in the lower Kenai River by comparing indexes of abundance of various native fish species in blackfish-impacted streams and unimpacted streams. Additionally, the growth of juvenile Coho salmon (Oncorhynchus kisutch) was compared between the two stream types. This study concluded, based on field data and literature review, that Alaska Blackfish are a likely a benign invader to most, but not all, Kenai Peninsula native fish species.
Presentation by Lucas Byker with the U.S. Fish and Wildlife Service at the 15th Annual Mat-Su Salmon Science & Conservation Symposium.
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