COOPERATIVE DISPLAY AND RELATEDNESS AMONG MALES IN A LEK-MATING BIRD
COOPERATIVE DISPLAY AND RELATEDNESS AMONG MALES IN A LEK-MATING BIRD
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DOI：
10.1126/science.7973654
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发表时间：
1994-11-11
期刊：
影响因子：
56.9
通讯作者：
POTTS, WK
中科院分区：
文献类型：
--
作者：
MCDONALD, DB;POTTS, WK
长尾侏儒鸟以列克交配，并以多年的雄性-雄性伙伴关系合作。一个雄性首领负责几乎所有的交配，而一个雄性首领则协助求爱。贝塔男性的这种利他行为给进化理论带来了一个问题，因为大多数合作行为的理论处理和经验例子都涉及亲属选择或互惠。在这里，它表明，阿尔法和贝塔伙伴不是亲戚，互惠是不涉及。相反，直接的，虽然长期延迟的好处，以贝塔男性被证明，其中包括罕见的交配，Ascension到阿尔法地位，和女性列克忠诚。这些好处维持了这种不寻常的男女合作形式。
Long-tailed manakins mate in leks and cooperate in multiyear male-male partnerships. An alpha male is responsible for virtually all mating, whereas a beta male assists in the courtship displays. Such altruism by the beta male poses a problem for evolutionary theory because most theoretical treatments and empirical examples of cooperative behavior involve kin selection or reciprocity. Here it is shown that alpha and beta partners are not relatives and that reciprocity is not involved. Instead, direct, though long-delayed benefits to beta males are demonstrated, which include rare copulations, ascension to alpha status, and female lek fidelity. These benefits maintain this unusual form of male-male cooperation.