Sex differences in survival selection in the serin, Serinus serinus

被引:24
作者
Björklund, M
Senar, JC
机构
[1] Uppsala Univ, Evolutionary Biol Ctr, Dept Anim Ecol, SE-75236 Uppsala, Sweden
[2] Museu Zool, Barcelona, Spain
关键词
adaptive landscape; conflicting selection; correlational selection; finches; natural selection;
D O I
10.1046/j.1420-9101.2001.00334.x
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Natural selection is demonstrated in most natural populations which suggests that populations are dispatched from their adaptive peaks as a result of selection on correlated characters, or conflicting selection between the sexes. We analysed patterns of survival selection in a population of serins (Serinus serinus) outside Barcelona over a period of 13 years. There was directional selection for increased wing length in males and females accompanied by strong disruptive selection on both tail and wing length in males and a selection against a positive correlation between the two characters in males. In females there was directional selection for increased bill width but decreased bill depth, which should be contrasted to the stabilizing selection acting on bill depth in males. There were conflicting selection on the characters within a sex and conflicting selection of the sa-me characters between sexes, which constrain the rate of access to the nearest adaptive peak.
引用
收藏
页码:841 / 849
页数:9
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