The influence of potential reproductive rate and variation in mate quality on male and female choosiness in the sand goby, Pomatoschistus minutus
The influence of potential reproductive rate and variation in mate quality on male and female choosiness in the sand goby, Pomatoschistus minutus
复制标题
潜在繁殖率和交配质量变化对沙虾虎鱼雌雄选择的影响
DOI：
10.1007/s002650000246
复制
发表时间：
2000
影响因子：
2.3
通讯作者：
E. Forsgren
中科院分区：
文献类型：
--
作者：
C. Kvarnemo;E. Forsgren
摘要最近的择偶模型确定了两个特别重要的因素：选择性别的潜在生殖率（PRR）相对于所选性别的潜在生殖率，以及潜在配偶质量的变化。 本实验研究测试了这些因素如何影响雄性和雌性沙虾虎鱼，Pomatoschistus minutus的选择性。我们用水温控制相对繁殖率，用体长控制交配质量。选择男性或女性提供了一个选择之间的两个配偶，要么是一个小或大的差异，在身体长度代表一个小或大的变化，在交配质量。选择性的衡量标准是（1）对较大配偶的偏好，以及（2）是否与较小的配偶一起产卵，而较大的配偶是可见的，但被屏蔽了。我们发现，女性更喜欢大的男性，他们的择偶水平的影响，在男性质量的变化，但不是由自己的相对PRR。另一方面，男性似乎在所有治疗中没有选择性，一般来说比女性更有可能与他们提供的伴侣一起产卵。这表明，在沙虾虎鱼，雄性交配质量的变化有更大的影响比相对PRR的兼性变化，女性的选择。然而，男性和女性之间的PRR的一般差异可能是解释所观察到的性别差异的一个重要因素。
Abstract Recent models of choosiness in mate choice have identified two particularly important factors: the potential reproductive rate (PRR) of the choosing sex relative to that of the chosen sex, and the variation in quality of potential mates. This experimental study tested how these factors affected choosiness in male and female sand gobies, Pomatoschistus minutus. We manipulated relative PRR by means of water temperature, and mate quality by means of body length. The choosing male or female was offered a choice between two mates with either a small or a large difference in body length representing a small or a large variation in mate quality. Choosiness was measured as (1) preference for the larger mate, and (2) as whether or not spawning occurred with the smaller mate, while the larger mate was visible but screened off. We found that females preferred large males, and that their level of choosiness was affected by variation in male quality, but not by their own relative PRR. Males, on the other hand, seemed unselective in all treatments and were in general more likely than females to spawn with their provided partner. This suggests that in the sand goby, variation in male mate quality has a greater influence than relative PRR on facultative changes in female choosiness. However, a general difference in PRR between males and females may be one important factor explaining the observed sex difference in choosiness.