Conflict between sexes in the water strider Gerris lacustris: A test of two hypotheses for male guarding behavior
Conflict between sexes in the water strider Gerris lacustris: A test of two hypotheses for male guarding behavior
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DOI：
10.1093/beheco/6.4.388
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发表时间：
1995-12-01
影响因子：
2.4
通讯作者：
Vepsalainen, K
中科院分区：
文献类型：
--
作者：
Jablonski, P;Vepsalainen, K
我们研究了女性的不情愿和男性的持久性交配，以及在根的lacustris的交配和交配后守卫的长度增加5个过剩的男性或女性的盆与一对串联的操作性比的影响。在对照处理中，仅对一对进行测试。根据交配守卫假说（CGH），男性应该延长交配和守卫女性存在过剩的男性。根据方便一妻多夫假说（CPH），女性应该表现出较低水平的阻力延长交配过剩的男性存在，因为交配男性保护女性免受其他男性的骚扰。正如预期的CGH和CPH的基础上，交配（交配+守卫）平均更长的男性偏向的治疗。在交配过程中的男性和女性的行为表明，这两个假设成立：女性表现出较低的阻力延长交配（如预测从CPH），男性的行为表明更强的努力留在女性时，过剩的男性存在（如预测从CGH）。处理与盈余女性的结果，从交配对没有盈余的个人的比较表明，水的能力，在串联评估附近的nonmating的大步走性别是有限的。
We studied the effect of operational sex ratio on female reluctance and male persistence to mate as well as on the length of copulation and postcopulatory guarding in Gen's lacustris by adding five surplus males or females to the basin with a pair in tandem. In the control treatment, a pair alone was tested. According to the copulatory guarding hypothesis (CGH), males should prolong mating and guard females in the presence of surplus males. According to the convenience polyandry hypothesis (CPH), females should show lower levels of resistance to prolonged mating in the presence of surplus males because the mating male protects the female against harassment from other males. As expected on the basis of both the CGH and CPH, mating (copulation + guarding) averaged longer in the male-biased treatment. The behavior of males and females during mating suggested that both hypotheses hold true: females showed less resistance to prolonged mating (as predicted from CPH), and male behavior suggested stronger efforts to stay on the female when surplus males were present (as predicted from CGH). Comparisons of the treatment with surplus females with the results from the mating pair without surplus individuals suggested that the capabilities of water striders in tandem to assess the sex of nearby nonmating striders are limited.