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Sexy sons thanks to mom
Date:9/29/2011

ormones. Favoring early eggs and the first hatchlings is a worthwhile investment for the mother as these offspring have a demonstrably higher chance of survival. "It appears that there is strong competition among males to fertilize these valuable eggs early in a female's laying sequence," explains lead author Barbara Tschirren. "They try to exploit the female's egg investment bias to ensure a head start for their own offspring." She hypothesizes that sperm competition might decide the battle, with males with faster sperm being able to fertilize the most valuable eggs.


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Contact: Professor Dr. Barbara Tschirren
barbara.tschirren@ieu.uzh.ch
41-446-354-777
University of Zurich
Source:Eurekalert  

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