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Sexy males make mothers better 靚老公造就好媽媽
« on: Sep 19th, 2004, 7:18pm » |
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《New Scientist》科學雜誌報道：
雄性藍山雀的冠羽可以反射紫外光，以此吸引異性。荷蘭研究人員在一些雄鳥的頭 頂塗上阻隔紫外光的化學劑，令牠們變得沒有那麼「靚仔」，然後觀察牠們的配偶 在育雛方面的表現。
研究發現有「靚仔老公」的雌鳥育雛會比較落力，而老公平平無奇的雌鳥會比 較懶惰。
研究員對這種現象的解釋是：「靚仔老公」能夠生出更健康的下一代，因此值得雌鳥落力照顧，以便留下更多子子孫孫。如果老公平平無其，下一代未必個個都「標青」，雌鳥就要「留力」，為未來度冬打算，因此便沒有那麼努力去照顧雛鳥了。
New Scientist: Sexy males make bird mothers better
00:01 18 August 04
NewScientist.com news service
"Female blue tits put in more parental effort if the father of their chicks is attractive, shows a new study.
"Bringing up chicks is a risky business for many birds – the more effort the mother puts into feeding the youngsters, the less likely she is to survive to the next season. It is a risk that blue tit mothers would rather not take, unless, that is, they have a sexy dad. ..."
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