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Einfluß von Testosteron auf Gefiederfärbung und Depotfett bei der JapanwachtelCoturnix coturnix japonica

The influence of testosterone on plumage colour and depot fat in Japanese QuailCoturnix coturnix japonica

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Zusammenfassung

Kastration führt zu einer vermehrten Anlagerung von Depotfett. Gaschromatographische Untersuchungen zur Fettsäurenzusammensetzung ergaben, daß kein großer qualitativer Unterschied zwischen ♂ und Kastraten besteht. Es handelt sich vorwiegend um eine quantitative Änderung. Die Wärmedurchgangszahl der Kastraten (1.32 J/K·g·h) liegt um 11 % unterhalb der der ♂ (1.44 J/K·g·h). Dies beruht auf einer besseren Isolation der kastrierten Wachtel, die vor allem auf der verstärkten Fettanlagerung beruht. Kastraten bekommen ein dunkleres Gefieder und dunklere Krallen. Dies läßt sich auf eine durch Testosteronmangel beeinflußte, erhöhte Melanotropinausschüttung zurückführen.

Summary

Castration leads to an increased accumulation of depot fat. Gaschromatographic investigations showed no significant difference in fatty acid composition between intact males and castrates. Thermal conductance of castrates (1.32 J/K·g·h) is 11 % lower than in males (1.44 J/K·g·h). This is due to a better insulation in the castrated quails, mainly caused by the increased deposition of fat. Feathers and claws of castrates become darker. This may be an effect of an increased melanotropin secretion induced by the low testosterone-level.

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Authors and Affiliations

  1. Aus dem Lehrstuhl Zoophysiologie der Universität Tübingen, Germany

    Ingrid Feuerbacher & Roland Prinzinger

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  1. Ingrid Feuerbacher
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  2. Roland Prinzinger
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Feuerbacher, I., Prinzinger, R. Einfluß von Testosteron auf Gefiederfärbung und Depotfett bei der JapanwachtelCoturnix coturnix japonica . J Ornithol 123, 203–209 (1982). https://doi.org/10.1007/BF01645058

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