Intra-sexual selection in a North American annual killifish: does the color-polymorphism matter?

IF 1.1 4区 生物学 Q4 BEHAVIORAL SCIENCES
Domínguez-Castanedo Omar
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引用次数: 0

Abstract

The decision to escalate aggression in a contest is based on the assessment of oneself and the opponent's capabilities, previous experiences and the asymmetries between contenders. Interestingly, there is increasing evidence that color polymorphism may also influence the result in a contest during agonistic encounters. Therefore, this research aimed to analyze, for the first time, the intra-sexual competition of adult males of the Mexican Rivulus Millerichthys robustus, testing the influence of color polymorphic variations during agonistic contests. The results of this study suggest that the aggressiveness between morphotypes is of orange and red over yellow. The orange morph was related to winning the greatest number of encounters, whereas yellow lost the most. The red morpho registered the greatest number of ties. Interestingly, in contests between more aggressive morphs (orange and red), fish tended to modulate and lower aggressiveness levels, possibly to avoid injuries. In contrast, the least aggressive morphotype (yellow) tended to raise its aggressiveness against the most successful morphotype and lower it in matches against its own color, changing to a scheme between contenders with symmetrical aggression levels. These results suggest that differential aggression between morphotypes can influence the evolution of color polymorphism in M. robustus, differentially influencing the fitness of the individuals.

Abstract Image

Abstract Image

北美一年生鳉鱼的性内选择:颜色多态性重要吗?
在竞争中,攻击升级的决定是基于对自身和对手能力的评估、以往的经验以及竞争者之间的不对称。有趣的是,越来越多的证据表明,肤色的多态性也可能会影响激烈交锋中的竞争结果。因此,本研究旨在首次分析墨西哥鲂成年雄鱼的性内竞争,测试颜色多态性变化在激斗过程中的影响。研究结果表明,形态之间的攻击性是橙色和红色优于黄色。橙色形态赢得了最多的交锋,而黄色形态输掉了最多的交锋。红色形态注册的平局次数最多。有趣的是,在攻击性较强的形态(橙色和红色)之间的较量中,鱼类倾向于调节和降低攻击性水平,这可能是为了避免受伤。相反,攻击性最弱的形态(黄色)在与最成功的形态对决时往往会提高攻击性,而在与自己颜色的形态对决时则会降低攻击性,从而转变为攻击性水平对称的竞争者之间的方案。这些结果表明,不同形态之间的攻击性会影响健壮蛙颜色多态性的进化,从而对个体的适应性产生不同的影响。
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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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