2018年
Net-chasing training improves the behavioral characteristics of hatchery-reared red sea bream (Pagrus major) juveniles
Canadian Journal of Fisheries and Aquatic Sciences
- ,
- 巻
- 75
- 号
- 6
- 開始ページ
- 861
- 終了ページ
- 867
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1139/cjfas-2017-0073
- 出版者・発行元
- Canadian Science Publishing
The low return rate of fish released for stock enhancement has often been attributed to hatchery-reared fish having inferior behavioral characteristics. We tried to improve the behavioral characteristic of red sea bream (Pagrus major) juveniles by using a net-chasing treatment. The fish were provided with 2 min of net chasing twice daily for 3 weeks, following which their behavioral characteristics (emergence from a start area, avoidance response to novel stimulus, and foraging following transfer between tanks) were individually tested and compared with a control group. A predator exposure test was then conducted using marbled rockfish (Sebastiscus marmoratus). Net-chased fish exhibited a shorter latency to emergence, a higher avoidance rate, and an earlier foraging time than the control fish, indicating that the net-chasing treatment may improve adaptability for environmental change and alertness to a novel object. The net-chased fish also exhibited a better survival rate than the control fish, with an odds ratio of 6.76. We suggest that net-chasing training represents an easy and efficient method for improving the behavior of fish for stock enhancement.
- ID情報
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- DOI : 10.1139/cjfas-2017-0073
- ISSN : 1205-7533
- ISSN : 0706-652X
- SCOPUS ID : 85047820803