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Parents seeking sex abandon 1 in 3 offspring

his could be said to be reminiscent of Hollywood life-styles with plenty of mating opportunities that may lead to neglect for the family at home.

We have shown that over the course of the breeding season desertion enables the parents to produce a greater number of offspring, improving their reproductive success over those more willing to stay home. Interestingly, however, the sexes play the same strategy; whatever is good for the male is harmful for his female, and vice versa.

Neither the males nor females are saints.

Responsibilities for childcare vary enormously throughout the bird kingdom. Usually both parents care for the young although the female takes the bulk of care. In a score of species, such as in phalaropes and lily-trotters, males do all of the childrearing.

As far as we know this willingness for both sexes to abandon the nest for the sake of new mates is unique, said Dr Szkely from the Universitys Department of Biology & Biochemistry.

Our findings reveal an intensive conflict between males and females over care that has affected the behavioural evolution of this species.


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Contact: Andrew McLaughlin
a.mclaughlin@bath.ac.uk
44-012-253-86883
University of Bath
30-Jul-2007


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