Science, Том 295,Выпуски 5559-5564John Michels (Journalist) American Association for the Advancement of Science, 2002 |
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Стр. 1685
... ratio theory remains a major challenge . We use meta - analysis to test the role of two constraints in the evolution of sex ratios . Based on analysis of sex ratio skews in birds and wasps , we show that ( i ) mechanisms of sex ...
... ratio theory remains a major challenge . We use meta - analysis to test the role of two constraints in the evolution of sex ratios . Based on analysis of sex ratio skews in birds and wasps , we show that ( i ) mechanisms of sex ...
Стр. 1686
... ratios as predicted by theory . The different symbols represent sex ratio adjust- ment by birds in response to mate quality ( solid circles ) or number of helpers ( solid squares ) , and by a mammal in response to the number of helpers ...
... ratios as predicted by theory . The different symbols represent sex ratio adjust- ment by birds in response to mate quality ( solid circles ) or number of helpers ( solid squares ) , and by a mammal in response to the number of helpers ...
Стр. 1687
... ratio adjustment in various roups of birds and parasitic wasps . 32 39 Class of study Mean r 95 % CI n studies x + birds , studies independent 0.252 ** 0.132-0.384 15 57 llbirds , species independent 0.261 ** 0.121-0.391 12 Il birds ...
... ratio adjustment in various roups of birds and parasitic wasps . 32 39 Class of study Mean r 95 % CI n studies x + birds , studies independent 0.252 ** 0.132-0.384 15 57 llbirds , species independent 0.261 ** 0.121-0.391 12 Il birds ...
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