Female remating decisions and mate choice benefits in the beetle Gnatocerus cornutus
Female remating decisions and mate choice benefits in the beetle Gnatocerus cornutus
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甲虫 Gnatocerus cornutus 的雌性再交配决定和配偶选择益处
DOI：
10.1007/s00265-022-03161-1
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发表时间：
2022
影响因子：
2.3
通讯作者：
Okada Kensuke
中科院分区：
文献类型：
--
作者：
Kiyose Katsuya;Katsuki Masako;Suzaki Y?;Okada Kensuke
女性通常会依次遇到男性，并且应该在遇到的男性中区分潜在的伴侣。因此，适当的顺序交配决定使雌性在多次遭遇的情况下获得配偶选择的好处。例如，如果交配后的雌性可以在交配前评估雄性的遗传质量，它们就可以与遗传优良的雄性交配，并通过生产优质后代间接受益（交换假设）。此外，由于雌性的交配为交配后的性选择提供了机会，雌性可以在交配后的过程中提高后代的质量。在legnatocerus cornutus中，雌性更喜欢在交配前积极求偶的伴侣，也更喜欢有吸引力的雄性，这给雌性提供了间接的好处，因为它们能生出有吸引力的儿子。然而，没有关于男性吸引力和由此产生的健康效益在女性选择配偶时的信息，在这里我们关注的是这一点。我们发现雌性很容易与有吸引力的雄性交配，而与没有吸引力的雄性交配过的雌性也很容易接受。随后，我们建立了四种实验处理方法：与一个有吸引力或没有吸引力的男性单独交配，与一个有吸引力的男性交配，然后与一个没有吸引力的男性交配，然后与一个没有吸引力的男性交配，然后与一个有吸引力的男性交配。所有与有吸引力的雄性交配的雌性都能生出有吸引力的儿子，而与有吸引力的雄性交配的顺序无关。这些结果表明，女性通过交换和偏向于有吸引力的男性的精子来提高儿子的质量。cornutus。另一方面，未观察到留宿对雌性适合度的直接影响。当雌性依次遇到雄性时，它们必须在遇到的雄性中选择合适的伴侣。在legnatocerus cornutus中，当雌性遇到多个配偶时，适当的顺序交配决定增加了获得有吸引力的雄性精子的可能性。也就是说，雌性很容易与有吸引力的雄性交配，而与没有吸引力的雄性交配的雌性也很容易接受。此外，无论与有吸引力的雄性交配的顺序如何，她们都会生出有吸引力的儿子。这表明，女性倾向于让有吸引力的男性的精子受精，以产生有吸引力的儿子。因此，雌性可能会与有吸引力的雄性交配，并使受精偏向于有吸引力的雄性的精子，从而产生有吸引力的儿子，间接地增加了雌性的适合度。cornutus。相比之下，残肢对雌性的适合度（寿命和后代数量）没有影响，因此残肢对雌性的适合度没有直接影响。
Females usually encounter males sequentially and should discriminate between potential partners among the males that they encounter. Thus, appropriate sequential mating decisions allow females to gain mate choice benefits in the circumstance of multiple encounters. For example, if mated females can assess the genetic quality of a male prior to mating, they can remate with genetically superior males and benefit indirectly by production of offspring of superior quality (trading-up hypothesis). Additionally, because female remating generates opportunities for postcopulatory sexual selection, females can improve son quality in postcopulation processes. In the beetleGnatocerus cornutus, females prefer mates that court vigorously before copulation and prefer attractive males, which provide indirect benefits to females because they sire attractive sons. However, there is no information about male attractiveness and the resulting fitness benefits in female remating decisions, and here we focused on this. We found that females readily remated with attractive males and that females who had mated with unattractive males readily accepted remating. Subsequently, we established four experimental treatments: a single mating with an attractive or unattractive male, mating with an attractive and then an unattractive male, and mating with an unattractive and then an attractive male. All females that mated with attractive males produced attractive sons, regardless of the order of mating with the attractive male. These results suggest that females improve son quality by trading up and biasing fertilizations toward sperm of attractive males inG. cornutus. On the other hand, no direct effect of remating on female fitness was observed.Significance statementWhen females encounter males sequentially, they must choose appropriate partners among the mates that they encounter. In the beetleGnatocerus cornutus, proper sequential mating decisions increase the likelihood of securing sperm of attractive males when females encounter multiple mates. That is, females readily remated with attractive males, and females that mated with unattractive males readily accepted remating. Additionally, they produced attractive sons regardless of the order of the mating with attractive males. This suggests that females bias fertilizations toward the sperm of attractive males to produce attractive sons. Therefore, females may produce attractive sons by remating with attractive males and biasing fertilization toward the sperm of attractive males, indirectly increasing female fitness inG. cornutus. By contrast, remating did not affect female fitness (longevity and offspring number), and so there was no direct effect of remating on female fitness.
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影响因子：
2.1
作者：
Fedina, T. Y.;Lewis, S. M.
通讯作者：
Lewis, S. M.
饮食质量对雄性和雌性武装甲虫 Gnatocerus cornutus 生活史特征和繁殖性能的影响
影响因子：
2.2
作者：
Katsuki M.;Okada Y;Okada K
通讯作者：
Okada K
影响因子：
2.5
作者：
Okada, Kensuke;Miyatake, Takahisa
通讯作者：
Miyatake, Takahisa
DOI：
10.1098/rspb.2009.2017
发表时间：
2010-06
期刊：
Proceedings of the Royal Society B: Biological Sciences
影响因子：
--
作者：
Takashi Yamane;K. Okada;S. Nakayama;T. Miyatake
通讯作者：
Takashi Yamane;K. Okada;S. Nakayama;T. Miyatake
DOI：
10.1098/rspb.2004.2933
发表时间：
2005-01
期刊：
Proceedings of the Royal Society B: Biological Sciences
影响因子：
--
作者：
A. Malo;E. Roldan;J. Garde;A. J. Soler;M. Gomendio
通讯作者：
A. Malo;E. Roldan;J. Garde;A. J. Soler;M. Gomendio