NDLI: Migratory Restlessness and the Role of Androgen for Increasing Behavioral Drive in theSpawning Migration of the Japanese eel

Content Provider	PubMed Central
Author	Sudo, Ryusuke Tsukamoto, Katsumi
Copyright Year	2015
Abstract	Migratory restlessness refers to a type of locomotor activity observed just beforethe onset of a migration. This behavior is primarily known in birds, where it isconsidered to be an indicator of the urge for migration. In contrast, little isknown about migratory restlessness in fishes. To confirm migratory restlessness in afish, we measured the locomotor activity of the Japanese eel, Anguillajaponica during its migration season. Migratory-phase silver eels showedhigher locomotor activity in aquaria than yellow eels at the non-migratiorygrowth-phase. Silver eels stayed outside of their shelters for longer durations indark periods than yellow eels and were active even in light periods when yellow eelswere inactive in the shelters. Silver eels had higher levels of the androgen hormone11-ketotestosterone at the end of experiment than yellow eels. Administration of11-ketotesosterone to yellow eels induced higher levels of locomotor activity thanthat observed in non-treated controls. These findings suggest that anguillid eelsexhibit migratory restlessness just before their spawning migration and that11-ketotestosterone may be involved in the onset of this behavior.
Related Links	http://dx.doi.org/10.1038/srep17430
Starting Page	17430
File Format	PDF
ISSN	20452322
e-ISSN	20452322
Journal	Scientific Reports
Volume Number	5
Language	English
Publisher	Nature Publishing Group
Publisher Date	2015-11-01
Access Restriction	Open
Rights Holder	Nature Publishing Group
Subject Keyword	Science and technology Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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Migratory Restlessness and the Role of Androgen for Increasing Behavioral Drive in the Spawning Migration of the Japanese eel

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