scholarly journals Wild Population and Natural Spawning of Chum Salmon in the Kozuchi River on the Sanriku Coast, Japan

2021 ◽  
Author(s):  
Yuki Minegishi ◽  
Tatsuya Kawakami ◽  
Jun Aoyama
Keyword(s):  
Chum Salmon ◽  
Wild Population ◽  
Sanriku Coast ◽  
Natural Spawning

scholarly journals Ⅲ-3. Abundance and habitats of juvenile chum salmon and their adult return in the Sanriku coast

2018 ◽  
Vol 84 (5) ◽  
pp. 928-928
Author(s):  
TAKUYA KAWASHIMA ◽  
YUICHI SHIMIZU ◽  
KATSUHIKO OHTA ◽  
KOUDAI YAMANE
Keyword(s):  
Chum Salmon ◽  
Sanriku Coast ◽  
Juvenile Chum Salmon

Relationship between coastal water properties and adult return of chum salmon (Oncorhynchus keta ) along the Sanriku coast, Japan

2016 ◽  
Vol 25 (6) ◽  
pp. 598-609 ◽  
Author(s):  
Taku Wagawa ◽  
Tsuyoshi Tamate ◽  
Hiroshi Kuroda ◽  
Shin-Ichi Ito ◽  
Shigeho Kakehi ◽  
...  
Keyword(s):  
Coastal Water ◽  
Chum Salmon ◽  
Oncorhynchus Keta ◽  
Sanriku Coast ◽  
Water Properties ◽  
Chum Salmon Oncorhynchus Keta

Rapid expansion of an enhanced stock of chum salmon and its impacts on wild population components

2011 ◽  
Vol 94 (1) ◽  
pp. 249-258 ◽  
Author(s):  
Lev A. Zhivotovsky ◽  
Ludmila K. Fedorova ◽  
Galina A. Rubtsova ◽  
Marina V. Shitova ◽  
Tatiana A. Rakitskaya ◽  
...  
Keyword(s):  
Chum Salmon ◽  
Wild Population ◽  
Rapid Expansion

Selection equilibrium for hatchery and wild spawning fitness in integrated breeding programs

2005 ◽  
Vol 62 (2) ◽  
pp. 374-389 ◽  
Author(s):  
Daniel Goodman
Keyword(s):  
Wild Population ◽  
Biological Characteristics ◽  
Total Production ◽  
Phenotypic Evolution ◽  
Breeding Programs ◽  
Hatchery Fish ◽  
Natural Spawning ◽  
Selection Equilibrium ◽  
In The Wild ◽  
Salmon Hatchery

Some salmon hatchery programs intentionally integrate the wild and hatchery population by taking naturally spawned fish as some fraction of the broodstock and allowing hatchery progeny to constitute some fraction of the adults spawning in the wild. This circumvents some ecological concerns about the effects of hatchery fish on the "wild" population while still reaping some of the benefits of increased potential for harvest, but it increases some genetic concerns. Here, we model phenotypic evolution in the integrated population to investigate the effects on natural spawning fitness at the joint selection and demographic equilibrium. We find a potential, but not a certainty, depending on quantitative aspects of the management interacting with biological characteristics of the stock, for substantial erosion of natural spawning fitness, compared with the original wild population, including the possibility of runaway selection driving natural spawning fitness effectively to zero. The vulnerability to such evolutionary deterioration increases with the magnitude of the contribution of hatchery breeding to the total production and increases with harvest. The response of the selection equilibrium to increasing contribution of hatchery progeny to the broodstock can exhibit a catastrophic discontinuity.

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