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Involvement of hormones in olfactory imprinting and homing in chum salmon
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| Title: | Involvement of hormones in olfactory imprinting and homing in chum salmon |
| Authors: | Ueda, Hiroshi Browse this author →KAKEN DB | | Nakamura, Shingo Browse this author | | Nakamura, Taro Browse this author | | Inada, Kaoru Browse this author | | Okubo, Takashi Browse this author | | Furukawa, Naohiro Browse this author | | Murakami, Reiichi Browse this author | | Tsuchida, Shigeo Browse this author | | Zohar, Yonathan Browse this author | | Konno, Kotaro Browse this author | | Watanabe, Masahiko Browse this author |
| Issue Date: | 17-Feb-2016 |
| Publisher: | Nature Publishing Group |
| Journal Title: | Scientific reports |
| Volume: | 6 |
| Start Page: | 21102 |
| Publisher DOI: | 10.1038/srep21102 |
| Abstract: | The olfactory hypothesis for salmon imprinting and homing to their natal stream is well known, but the endocrine hormonal control mechanisms of olfactory memory formation in juveniles and retrieval in adults remain unclear. In brains of hatchery-reared underyearling juvenile chum salmon (Oncorhynchus keta), thyrotropin-releasing hormone gene expression increased immediately after release from a hatchery into the natal stream, and the expression of the essential NR1 subunit of the N-methyl-D-aspartate receptor increased during downstream migration. Gene expression of salmon gonadotropin-releasing hormone (sGnRH) and NR1 increased in the adult chum salmon brain during homing from the Bering Sea to the natal hatchery. Thyroid hormone treatment in juveniles enhanced NR1 gene activation, and GnRHa treatment in adults improved stream odour discrimination. Olfactory memory formation during juvenile downstream migration and retrieval during adult homing migration of chum salmon might be controlled by endocrine hormones and could be clarified using NR1 as a molecular marker. |
| Rights: | http://creativecommons.org/licenses/by/4.0/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/61150 |
| Appears in Collections: | 北方生物圏フィールド科学センター (Field Science Center for Northern Biosphere) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 上田 宏
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