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タイトル: | Environmental stimuli improve learning capability in striped knifejaw juveniles: the stage-specific effect of environmental enrichment and the comparison between wild and hatchery-reared fish |
著者: | Makino, Hirona Masuda, Reiji https://orcid.org/0000-0002-2184-1533 (unconfirmed) Tanaka, Masaru |
著者名の別形: | 益田, 玲爾 |
キーワード: | Behavioral ontogeny Critical period Environmental enrichment Habitat complexity Oplegnathus fasciatus Reward conditioning Stock enhancement Y-maze |
発行日: | Nov-2015 |
出版者: | Springer Japan |
誌名: | Fisheries Science |
巻: | 81 |
号: | 6 |
開始ページ: | 1035 |
終了ページ: | 1042 |
抄録: | Hatchery-reared fish often show different behavioral traits from their wild counterparts, possibly due to the lack of environmental stimuli. Here, we aimed to reveal the stage-specific effect of environmental stimuli on the development of learning capability in striped knifejaw Oplegnathus fasciatus. The fish were raised for 15 days (50–65 days post-hatch) or 30 days (50–80 or 90–120 days post-hatch) in either conventional rearing tanks (control) or in a structurally enriched tank containing bricks, artificial sea grass, and plastic pipes (enriched environment), and were examined for learning capability using Y-maze reward conditioning. The learning capability of wild juveniles was also examined, and their scores were compared with those of hatchery-reared fish (which we previously reported). Only fish in the 50–80 days post-hatch enriched-rearing group showed significantly better scores than those in the control group, and wild fish performed better than hatchery-reared ones. The present results indicate that, although the learning capability of hatchery-reared fish is inferior to that of wild fish, exposure to a highly structured environment at an appropriate stage promotes the development of learning capability. Such environmental enrichment can potentially improve the viability of hatchery-reared fish when they are released into the wild. |
記述: | First online: 02 September 2015 |
著作権等: | The final publication is available at Springer via http://dx.doi.org/10.1007/s12562-015-0917-0. The full-text file will be made open to the public on 02 September 2016 in accordance with publisher's 'Terms and Conditions for Self-Archiving'. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 This is not the published version. Please cite only the published version. |
URI: | http://hdl.handle.net/2433/207516 |
DOI(出版社版): | 10.1007/s12562-015-0917-0 |
出現コレクション: | 学術雑誌掲載論文等 |
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