Massive stocking of chum salmon (Oncorhynchus keta) fry fattens non-native brown trout (Salmo trutta) in Hokkaido, Japan DOI Creative Commons
Kentaro Honda, Koh Hasegawa, Masatoshi Ban

et al.

PLoS ONE, Journal Year: 2024, Volume and Issue: 19(7), P. e0307552 - e0307552

Published: July 19, 2024

In Japan, stocked chum salmon ( Oncorhynchus keta ) fry may have become the perfect prey for non-native brown trout Salmo trutta ), which are popular targets of anglers. If this is case, stocking intended to boost commercial fishing be helping sustain populations an invasive predator. We used dietary and biochemical analyses examine whether quickly restore their nutritional status following wintertime declines by preying upon that in spring. targeted six rivers Hokkaido, three with without. Changes condition factor, triglyceride contents muscle serum, serum insulin-like growth factor-1 (IGF-1; indicator short-term growth), docosahexaenoic acid (DHA; essential fatty abundant fish) content were examined between before during period rivers. Dietary analysis showed preyed on all Their tended higher than rivers, but not unstocked These results suggest massive provides fuel increased growth; therefore a controversial issue among stakeholders.

Language: Английский

Massive stocking of chum salmon (Oncorhynchus keta) fry fattens non-native brown trout (Salmo trutta) in Hokkaido, Japan DOI Creative Commons
Kentaro Honda, Koh Hasegawa, Masatoshi Ban

et al.

PLoS ONE, Journal Year: 2024, Volume and Issue: 19(7), P. e0307552 - e0307552

Published: July 19, 2024

In Japan, stocked chum salmon ( Oncorhynchus keta ) fry may have become the perfect prey for non-native brown trout Salmo trutta ), which are popular targets of anglers. If this is case, stocking intended to boost commercial fishing be helping sustain populations an invasive predator. We used dietary and biochemical analyses examine whether quickly restore their nutritional status following wintertime declines by preying upon that in spring. targeted six rivers Hokkaido, three with without. Changes condition factor, triglyceride contents muscle serum, serum insulin-like growth factor-1 (IGF-1; indicator short-term growth), docosahexaenoic acid (DHA; essential fatty abundant fish) content were examined between before during period rivers. Dietary analysis showed preyed on all Their tended higher than rivers, but not unstocked These results suggest massive provides fuel increased growth; therefore a controversial issue among stakeholders.

Language: Английский

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