| 金定鸭的性双态分化和性行为发育 |
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| 引用本文： | 陈小麟,范越.金定鸭的性双态分化和性行为发育[J].家畜生态,1994,15(3):8-12. |
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| 作者姓名： | 陈小麟 范越 |
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| 作者单位： | 厦门大学生物学系 |
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| 摘 要： | 金定鸭的外型分化，受自然选择和性选择的双重影响。在生长发育过程中，依羽域在适应水域环境的重要性，雌雄金定鸭的正羽都按共同的羽域顺序陆续更换生长；与此同时，一日龄外型相同的异性雏鸭，逐渐表现出性双态，包括喙色、羽色、声音、性羽、体重和行为的表型差异，以满足繁殖竞争的需要。金定鸭性行为的出现以其性双态分化为基础，而性行为的分化又是其生理成熟的前提条件。对雄鸭的观察分析结果表明，性双态分化和性行为发育速度的快慢与其生理成熟的早迟是一致的。黑色尾羽的雄鸭，体重较小，其发育速度和性成熟均快于体重较大的白喙或端白尾羽者，因此，建议将尾羽颜色、性双态分化和性行为发育速度作为雄鸭的选育指标。
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| 关 键 词： | 性双态 性行为 发育 金定鸭 |
The Differentiation of Sexual Dimorphism and Ontogeny of Sexual Behaviour in Jinding Duck |
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| Chen Xiaolin Fan Yue.The Differentiation of Sexual Dimorphism and Ontogeny of Sexual Behaviour in Jinding Duck[J].Ecology of Domestic Animal,1994,15(3):8-12. |
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| Authors: | Chen Xiaolin Fan Yue |
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| Institution: | Chen Xiaolin Fan Yue |
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| Abstract: | The appearance differentiation of jinding duck was both
influenced by the natural selection and sexual selection.During the development period,the
pluma of both male and female Jinding ducks molted and grew gradually in the same pteryla
se-quence which was correspondence with the significances in adapting to the aquatic
envi-ronment.At the same time,he ducklings,which had the common appearance in both sexes
at one-day age,also gradually expressed the sexual dimorphism including the dif-ference in bill
and feather colouration,voice,sexual feather,body size and behaviour,so that they could meet
the requirement of reproductive competition.The expression of sex-al behaviour in Jinding duck
based on its dimorphic differentiation but was the basis of its physiological maturity.The
results of observation on drakes indicated that the speeds among their differentiation of sexual
dimorphism ,ontogeny of sexual behaviour and physiological maturity were parellel.The drake
with black rectrices had the smaller size and developed more qickly than that with rectrices
edged or ended with white.As thisresult,the colouration of rectrice,the differentiation speed of
sexual dimorphism and theontogeny speed of sexual behaviour might be proposed as the
selection characters in drake. |
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| Keywords: | Sexual dimorphism Sexual behaviour Ontogeny Jinding duck Drake selection |
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