让我们等待傍晚：热带豆娘 Phylolestes ethelae 的夜间交配（蜻蜓目，鞘翅目）

IF 1 4区环境科学与生态学 Q3 BIODIVERSITY CONSERVATION

Animal Biodiversity and Conservation Pub Date : 2024-01-30 DOI:10.32800/abc.2024.47.0019

A. Cordero‐Rivera, J. C. Núñez, C. Suriel

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引用次数: 0

摘要

性选择是导致种内和种间生殖行为多样性的主要原因之一。在这里，我们研究了一个独特物种--Phylolestes ethelae--的繁殖行为，它是在美洲发现的唯一一种鞘翅目昆虫。我们的假设是，该物种在系统发育上的独特性以及生活在岛屿上的事实将产生值得保护的新行为，因为它们是生物多样性的一部分。2017 年至 2019 年期间，我们通过标记-重捕技术和重点观察，对多米尼加共和国阿曼多-贝穆德斯国家公园中的 P. ethelae 种群进行了研究。存活率估计为 0.953 ± 0.012（SE），即预期寿命为 20.6 天。我们发现，一些雄性表现出很高的地点忠诚度，但活动很少，领地纠纷几乎不存在。而雌性则很少在河边被观察到，主要是在附近的小路和森林里。我们记录了 28 次交配，共观察到 17 次交配，平均持续时间为 18.6 分钟。对交配过程中中断的雌性精子数量的研究表明，雄性在交配第一阶段从雌性的交配囊中取出了大部分精子，但它们无法从成对的精囊中取出精子。交配前的串联持续时间变化很大（从 3 分钟到 7.8 小时不等）。有些情况下，在串联形成后不久（3 分钟）就能观察到交配，主要是在上午。然而，也有一些配对在上午形成，并保持串联数小时，并在黄昏后很晚才交配。雌鸟产卵时没有雄鸟陪伴。在主要活动高峰后交配可能是一种保护精子投资的策略，因为黄昏后产卵的雌性当天不太可能再次交配。黄昏后交配的雄性的表型相关性还需要进一步研究。

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Let's wait for the evening: nocturnal copulation in a tropical damselfly Phylolestes ethelae (Odonata, Synlestidae)

Sexual selection is one of the main causes of the diversity of reproductive behaviours observed intra- and interspecifically. Here we study the reproductive behaviour of a unique species, Phylolestes ethelae, the only member of the family Synlestidae (Odonata) found in America. Our hypothesis was that the phylogenetic uniqueness of this species and the fact that it lives on an island would produce novel behaviours worth protecting as they are a part of the biodiversity. Between 2017 and 2019 we studied a population of P. ethelae in the National Park Armando Bermúdez in the Dominican Republic by means of mark-recapture techniques and focal observations. The survival rate was estimated as 0.953 ± 0.012 (SE), which translates into an expected lifespan of 20.6 days. We found that some males showed high site fidelity but very little activity, and territorial disputes were almost inexistent. Females, on the other hand, were rarely observed on the river, and were found mainly on the nearby paths and forest. We recorded 28 tandems and observed a total of 17 copulations, lasting an average of 18.6 min. Examination of sperm volumes in females interrupted during copulation indicated that males removed most of the sperm from the female bursa copulatrix during stage I of copula, but they could not remove sperm from the paired spermathecae. The duration of precopulatory tandem was highly variable (from 3 min to 7.8 h). In some cases, copulation was observed shortly (3 min) after tandem formation, mainly during the morning. However, some pairs formed during the morning, remained in tandem for several hours, and mated late, after dusk. Females laid eggs not accompanied by the male. Mating after the main peak of activity might be a strategy which protects sperm investment because females laying eggs after dusk are unlikely to be mated again that day. Further studies are needed to decipher phenotypic correlates of the males that mate after dusk.

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来源期刊

Animal Biodiversity and Conservation 农林科学-动物学

CiteScore

2.00

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Animal Biodiversity and Conservation (antes Miscel·lània Zoològica) es una revista interdisciplinar, publicada desde 1958 por el Museu de Ciències Naturals de Barcelona. Incluye artículos de investigación empírica y teórica en todas las áreas de la zoología (sistemática, taxonomía, morfología, biogeografía, ecología, etología, fisiología y genética) procedentes de todas las regiones del mundo. La revista presta especial interés a los estudios que planteen un problema nuevo o introduzcan un tema nuevo, con hipòtesis y prediccions claras, y a los trabajos que de una manera u otra tengan relevancia en la biología de la conservación. No se publicaran artículos puramente descriptivos, o artículos faunísticos o corológicos en los que se describa la distribución en el espacio o en el tiempo de los organismes zoológicos.