Non-invasive Monitoring of Faecal Testosterone Metabolite Concentrations in a Northern Fur Seal (<i>Callorhinus ursinus</i>)
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- OTSUKI Mayuko
- Graduate School of Environmental Science, Hokkaido University
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- KOHYAMA Kaoru
- Izu Mito Sea Paradise
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- GOSHIMA Wataru
- Izu Mito Sea Paradise
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- KOBAYASHI Motoki
- Field Science Center for Northern Biosphere, Hokkaido University
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- HASEGAWA Yuya
- Graduate School of Fisheries Sciences, Hokkaido University
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- MORITA Yuka
- Institute for East China Sea Research, Nagasaki University
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- IJIRI Shigeho
- Graduate School of Fisheries Sciences, Hokkaido University
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- MITANI Yoko
- Field Science Center for Northern Biosphere, Hokkaido University
Bibliographic Information
- Other Title
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- キタオットセイ(<i>Callorhinus ursinus</i>)における 糞中テストステロン代謝物濃度の非侵襲的モニタリング
- Non-invasive Monitoring of Faecal Testosterone Metabolite Concentrations in a Northern Fur Seal (Callorhinus ursinus)
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Abstract
<p> We examined the relationship between serum testosterone and faecal testosterone metabolite levels in a captive northern fur seal (Callorhinus ursinus) using time-resolved fluoroimmunoassay to develop non-invasive testosterone monitoring technique. We found a significant relationship between faecal testosterone metabolite and serum testosterone levels when the faeces were collected approximately one day after blood withdrawal. In addition, faecal testosterone metabolite levels showed seasonal fluctuations that were similar to those found in serum testosterone levels, with higher testosterone levels occurring during the breeding season. These results indicate that serum testosterone levels can be estimated using faecal testosterone metabolite levels. These methods will be a useful tool to non-invasively monitor reproductive cycles of male northern fur seals.</p>
Journal
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- Japanese Journal of Zoo and Wildlife Medicine
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Japanese Journal of Zoo and Wildlife Medicine 25 (1), 29-34, 2020-03-31
Japanese Society of Zoo and Wildlife Medicine
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Details 詳細情報について
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- CRID
- 1390285300161052544
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- NII Article ID
- 130007849750
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- NII Book ID
- AA11366156
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- ISSN
- 2185744X
- 13426133
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- NDL BIB ID
- 030387782
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed