Adapting Hokkaido Hatchery Strategies to Regional Ocean Conditions Can Improve Chum Salmon Survival and Reduce Variability

Nagata, Mitsuhiro; Miyakoshi, Yasuyuki; Fujiwara, M.; Kasugai, Kiyoshi; Ando, Daisei; Torao, Mitsuru; Saneyoshi, Hayato; Irvine, James

doi:10.23849/npafcb6/73-85

Cited by 1 publication

(2 citation statements)

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“…2015), when the water temperature in the surface layer in Prostor Gulf and Kuril’sky Bay usually exceeds 5°C, which is close to the optimal (7–11°C) for chum salmon releases in Hokkaido (Nagata et al . 2016). Lower returns of chum salmon are found when chum are released at lower temperatures (Seki & Shimizu, 1996).…”

Section: Fishing and Artificial Reproductionmentioning

confidence: 99%

“…If further warming occurs, large releases may result in decreased survival and smaller returns as found for Hokkaido Island, where the conditions of the early feeding period in coastal waters led to the premature migration of chum salmon to open waters and a decrease of catches (Nagata et al . 2016; Hirabayashi & Saito 2018; Gohda & Saito 2019). If there will be no further warming, then an increase in the release of juvenile chum salmon on Iturup Island may be followed by an increase in its stocks and catches.…”

Section: Fishing and Artificial Reproductionmentioning

confidence: 99%

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The relative importance of enhancement to the production of Salmon on Iturup Island (Kuril Islands, Russia)

Klovach

Leman

Гордеев

2020

Reviews in Aquaculture

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A historical review of biological enhancement and fisheries for Iturup Island demonstrates that enhancement has significantly increased numbers of chum salmon while pink salmon are produced almost entirely naturally. Fourteen hatcheries currently produce and release chum salmon fry; four of these also generate pink salmon. Favourable natural conditions make the waters near Iturup Island one of the most productive marine areas in the Russian Far East. Efficient hatcheries combined with favourable conditions resulted in increases in chum salmon catches from less than 100 tonnes in the early 1990s to more than 20 000 tonnes in the late 2010s. Becoming better informed of factors controlling salmon production in the Kuril Islands should help scientists in other regions of the North Pacific understand what controls their own salmon populations.

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Section: Fishing and Artificial Reproductionmentioning

confidence: 99%

Section: Fishing and Artificial Reproductionmentioning

confidence: 99%