Fertilization success suggests random pairing in frogs with regard to body size
Fertilization success suggests random pairing in frogs with regard to body size
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DOI：
10.1007/s00265-021-03081-6
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发表时间：
2021-09
影响因子：
2.3
通讯作者：
Johana Goyes Vallejos;John P. Gomez;Á. Hernández-Figueroa;Rebecca Vera;D. Green
中科院分区：
文献类型：
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作者：
Johana Goyes Vallejos;John P. Gomez;Á. Hernández-Figueroa;Rebecca Vera;D. Green
摘要：体型选配交配是个体之间的一种非随机配对模式，据推测，这种模式的出现是由于与体型相似的个体交配可能会提高繁殖成功率。其最接近的机制可能是雌性选择体型相似的配偶和/或在雄性与雄性之间的直接竞争中获得体型较大的雄性优势。体型选配交配发生的标志是交配中雌性和雄性体型之间的显着相关性。在这项研究中，我们研究了翡翠玻璃蛙 Espadarana prosoblepon 的交配模式，据称其交配系统基于雌性选择，因此是检验体型选型交配假设的合适研究系统。我们专门测试了是否E.在丛生中发现的原雄性青蛙比独居雄性更大，这表明体型较大的雄性在交配中具有优势，无论是较大的雄性还是体型匹配的成对青蛙受精卵的比例较高，这与体型选型交配的益处一致。我们在 E 中没有发现任何这些关系的证据。尽管雌性体型和窝产数之间存在正相关关系，但还是有可能的。抱丛中的雄性并不比未交配的雄性大，并且雄性的大小并不能预测受精卵的比例。因此，我们的证据表明 E 的交配模式。体型方面，prosobleponis是随机的，这与越来越多的证据表明体型可能不是影响无尾目交配模式的重要因素相一致。 意义陈述当体型相似的个体交配在一起的频率比偶然预期的多时，就会发生体型选配交配。解决这个问题的研究测试了交配对中雌性和雄性体型之间的相关性，但很少有研究测试与体型相似的个体交配是否能带来直接的好处。体型选配交配应该发生在可以进行交配选择的物种中，其中个体可以区分并选择与体型相似的个体交配。在青蛙中，之前的许多研究都在寻找体型选型交配的方法，但其发生或选择优势的证据仍然很少。我们使用翡翠玻璃蛙 Espadarana prosoblepon 作为研究系统来测试体型选型交配的预测。我们发现，交配偏好和受精成功率对于体型而言都是随机的。
AbstractSize-assortative mating is a pattern of non-random pairing among individuals that has been presumed to arise due to the enhanced reproductive success that may accrue from mating with an individual of similar size. Its proximal mechanism may be female choice for similarly sized mates and/or large-male advantage during bouts of direct male-male competition. The hallmark for the occurrence of size-assortative mating is a significant correlation between female and male body sizes in mated pairs. In this study, we investigated the mating pattern of the emerald glass frog,Espadarana prosoblepon, whose mating system is purportedly based on female choice and therefore is a suitable study system for testing hypotheses of size-assortative mating. We specifically tested whetherE. prosobleponmales found in amplexus were larger than solitary males, indicating a large-male advantage in mating and whether either larger males or size-matched pairs of frogs had a higher proportion of their eggs fertilized, consistent with a benefit to size-assortative mating. We found no evidence for any of these relationships inE. prosoblepondespite a positive correlation between female size and clutch size. Males in amplexus were not larger than unmated males, and male size did not predict the proportion of fertilized eggs. Our evidence thus indicates that the mating pattern ofE. prosobleponis random with respect to body size, in conformity with a growing body of evidence that body size is likely not a significant factor influencing mating patterns in anurans.Significance statementSize-assortative mating occurs when similarly sized individuals mate together more often than expected by chance. Studies addressing this question test for a correlation between female and male sizes within mating pairs, but few studies test whether mating with similarly sized individuals provides proximate benefits. Size-assortative mating should occur in species where mate choice is possible to occur, in which individuals can discriminate and choose to mate with similarly sized individuals. In frogs, many previous studies have searched for size-assortative mating, but evidence for its occurrence or selective advantage remains scant. We used the emerald glass frog,Espadarana prosoblepon, as a study system to test the predictions of size-assortative mating. We found that both mating preference and fertilization success are random with respect to body size.