Detrimental impact of a heatwave on male reproductive behaviour and fertility

IF 1.1 4区 生物学 Q4 BEHAVIORAL SCIENCES acta ethologica Pub Date : 2023-10-24 DOI:10.1007/s10211-023-00431-7
Afonso Grandela, Marta A. Antunes, Marta A. Santos, Margarida Matos, Leonor R. Rodrigues, Pedro Simões
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Abstract

Understanding how heatwaves impact on different aspects of mating behaviour and fertility is getting increasingly important. In this context, laboratory fertility and mating experiments involving manipulation and exposure of insects to different thermal conditions are common procedures. To conduct such experiments practical methods such as dyes are needed for an easy, non-invasive discrimination of individuals. We report here a study measuring the effect of an extended heat stress applied to males on several parameters of mating behaviour and fertility of laboratory populations of Drosophila subobscura derived from two distinct European locations. We found highly detrimental effects of heatwave on mating behaviour—with longer (courtship and copulation) latencies and lower mating occurrence but no changes in mating duration—and fertility, with reduced fecundity and reproductive success. Furthermore, we also tested the efficacy of food dye as a marker for individual discrimination and mating occurrence. While food dye did not allow to infer the occurrence of a mating based on a transfer of coloration from male to female, it did not affect mating and fertility, attesting its utility has a method for discriminating individuals within mating experiments in the context of thermal studies. Importantly, despite the fact that the heatwave was only applied in males, we observed an impact on behaviour of females that mated with stressed males, by often refusing their nuptial feeding. This opens possibilities for further integrated research on the changes of female and male mating behaviour and fertility under different thermal scenarios.

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热浪对男性生殖行为和生育能力的不利影响
了解热浪如何影响交配行为和繁殖力的各个方面变得越来越重要。在这种情况下,实验室繁殖力和交配实验涉及昆虫在不同热条件下的操作和暴露,是常见的程序。要进行此类实验,需要使用染料等实用方法,以便轻松、非侵入性地辨别个体。我们在此报告了一项研究,该研究测量了对雄性果蝇施加长时间热胁迫对来自欧洲两个不同地区的亚布库拉果蝇实验室种群的交配行为和繁殖力的几项参数的影响。我们发现热浪对交配行为和生育能力都有非常不利的影响--交配行为(求偶和交配)潜伏期延长,交配发生率降低,但交配持续时间没有变化。此外,我们还测试了食物染料作为个体识别和交配发生标记的有效性。虽然食物染色剂不能根据雄性向雌性的色素转移来推断交配的发生,但它并不影响交配和繁殖力,这证明了它在热研究背景下的交配实验中作为个体鉴别方法的实用性。重要的是,尽管热浪只作用于雄性,但我们观察到与受压雄性交配的雌性的行为受到了影响,它们经常拒绝雄性的新婚喂食。这为进一步综合研究不同热情景下雌性和雄性交配行为和生育能力的变化提供了可能性。
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来源期刊
acta ethologica
acta ethologica 生物-动物学
CiteScore
1.90
自引率
0.00%
发文量
18
审稿时长
>12 weeks
期刊介绍: acta ethologica publishes empirical and theoretical research papers, short communications, commentaries, reviews and book reviews as well as methods papers in the field of ethology and related disciplines, with a strong concentration on the behavior biology of humans and other animals. The journal places special emphasis on studies integrating proximate (mechanisms, development) and ultimate (function, evolution) levels in the analysis of behavior. Aspects of particular interest include: adaptive plasticity of behavior, inter-individual and geographic variations in behavior, mechanisms underlying behavior, evolutionary processes and functions of behavior, and many other topics. acta ethologica is an official journal of ISPA, CRL and the Portuguese Ethological Society (SPE)
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