当前位置: X-MOL 学术J. Crust. Biol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Sexual dimorphism of the major chela and sex ratio as indicators of the mating system in the estuarine snapping shrimp Alpheus colombiensis Wicksten, 1988 (Decapoda: Caridea: Alpheidae)
Journal of Crustacean Biology ( IF 1.1 ) Pub Date : 2020-09-24 , DOI: 10.1093/jcbiol/ruaa069
Juan C Azofeifa-Solano 1 , Jeffrey A Sibaja-Cordero 1, 2 , Ingo S Wehrtmann 1, 2
Affiliation  

Abstract
The sexual selection over traits that favor access to mating partners could promote the emergence of sexual dimorphism when the pressure is different between sexes. Monogamous species are considered to have a low degree of sexual dimorphism. The highly diverse snapping shrimps are usually regarded as monogamous, but the mating system has been studied only in few species. We aimed to provide insights into the mating system and sexual dimorphism of Alpheus colombiensisWicksten, 1988. The adult sex ratio was female biased, and solitary ovigerous females were found, suggesting a temporary mate guarding type of mating system. Our results also revealed sexual dimorphism on the snapping claw, which is larger in males than in females. The male’s snapping claw is probably under sexual selection, which can be mediated by male-male competition or female choice. We also estimated the A. colombiensis female size at maturity at 5.2 ± 0.76 mm. Our results contradict the common idea that snapping shrimps are monogamous species, and support that A. colombiensis probably have a temporary mate guarding (e.g., males can sexually interact with more than one female, in opposition to sexual monogamy). This study also sustains the growing evidence that alpheid shrimps display snapping claw sexual dimorphism.


中文翻译:

1988年河口鳄虾Alpheus colombiensis Wicksten主要螯虾的性别二异性和性别比作为交配系统的指标(十足目:Caridea:Alpheidae)

摘要
当性别压力不同时,对有利于交配伴侣的性状进行性选择可能会促进性二态性的出现。一夫一妻制的物种被认为具有较低的性二态性。高度多样化的鳄梨通常被视为一夫一妻制,但仅在极少数物种中研究了交配系统。我们的目的是提供对哥伦比亚拟南芥的交配系统和性二态性的见解威克斯滕(Wicksten),1988年。成年女性的性别比例有偏见,并且发现雌性单生的雌性,这表明它是一种临时的伴侣保护型交配系统。我们的研究结果还显示,爪上的性二态性较高,雄性比雌性更大。雄性的抢食爪可能处于性选择之下,这可以通过雄性竞争或雌性选择来介导。我们还估计了一个哥伦比亚成熟时的雌性大小为5.2±0.76 mm。我们的研究结果相矛盾的共同想法,捕捉虾是一夫一妻制的物种,和支持一个哥伦比亚可能有一个临时的配偶护卫(例如,男性可以与多于一名女性发生性关系,以反对一夫一妻制)。这项研究还支持了越来越多的证据表明,甲壳类虾显示出爪状的性二态性。
更新日期:2020-09-24
down
wechat
bug