Journal article
11-Oxygenated androgens in female teleosts: prevalence, abundance, and life history implications
General and comparative endocrinology, Vol.129(1), pp.1-12
2002
Handle:
https://hdl.handle.net/2376/102286
PMID: 12409090
Abstract
Although 11-ketotestosterone (11-KT) has been found in blood of females of several diadromous fish species, the importance, abundance, and prevalence of this and related 11-oxygenated androgens in females have not been investigated. To address this issue and to determine whether the differences among androgen profiles relate to specific life history strategies, particularly diadromous migrations, fish (males and females) of around 30 species were sampled and 5 androgens were measured by radioimmunoassay. Levels of 17β-estradiol and cortisol were also determined to evaluate ovarian and interrenal activity at the time of sampling. Testosterone (T) was the predominant androgen in most sexually recrudescent females. Only in female eel and sturgeon were 11-oxygenated androgens present in levels as high as, or higher than, those of T, although substantial amounts were also found in blood of mullet and salmonids. 11-KT was generally the most abundant 11-oxyandrogen, levels being higher than those of 11β-hydroxytestosterone or 11β-hydroxyandrostenedione. It is concluded that 11-oxygenated androgens are quantitatively minor steroids in most female fish. There was no convincing evidence to support the notion that the presence of 11-oxygenated androgens in blood is an adaptation specific to migratory fishes.
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Details
- Title
- 11-Oxygenated androgens in female teleosts: prevalence, abundance, and life history implications
- Creators
- P Mark Lokman - Department of Zoology, University of Otago, P.O. Box 56, Dunedin, New ZealandBernadette Harris - Department of Zoology, University of Otago, P.O. Box 56, Dunedin, New ZealandMakoto Kusakabe - Department of Zoology, University of Otago, P.O. Box 56, Dunedin, New ZealandDavid E Kime - Department of Animal and Plant Sciences, University of Sheffield, Sheffield S10 2TN, UKRüdiger W Schulz - Department of Developmental Biology, Research Group for Comparative Endocrinology, University of Utrecht, Padualaan 8, 3584 CH Utrecht, The NetherlandsShinji Adachi - Department of Biological Sciences, Faculty of Fisheries, Hokkaido University, 3-1-1 Minato-cho, 041-8611 Hakodate, JapanGraham Young - Department of Zoology, University of Otago, P.O. Box 56, Dunedin, New Zealand
- Publication Details
- General and comparative endocrinology, Vol.129(1), pp.1-12
- Academic Unit
- UNKNOWN
- Publisher
- Elsevier Inc
- Identifiers
- 99900546645601842
- Language
- English
- Resource Type
- Journal article