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Experiments with claw models explain the function of the waving display of Ilyoplax pusilla (Brachyura: Dotillidae)
Journal of Ethology ( IF 0.9 ) Pub Date : 2015-08-30 , DOI: 10.1007/s10164-015-0438-4
Daichi Izumi 1 , Yoko Kawano 1 , Yasuhisa Henmi 2
Affiliation  

Males of the dotillid crab, Ilyoplax pusilla, perform waving displays during the reproductive season. Unlike many fiddler crabs (genus Uca), however, the function of the waving display is unclear for this species. Experiments using waving and static claw models over short (10 cm) and long (25 cm) distances were conducted to investigate responses by wandering females to artificial waving signals. In long-distance choice experiments, presuming undirected waving to unseen females as broadcast waving, females were equally likely to approach the waving and static claw sections during the non-reproductive season, but significantly more females (65 %) chose the waving claw section during the reproductive season. In short-distance choice experiments, presuming directed courtship waving toward a particular female, there was no significant difference between the waving and static claw models during the non-reproductive season, but significantly more females (88 %) chose the waving claw during the reproductive season. These results suggest that one function of the waving display of I. pusilla is mate attraction and that waving from a short distance is more effective.

中文翻译:

爪模型实验解释了 Ilyoplax pusilla (Brachyura: Dotillidae) 的挥舞展示功能

圆点蟹的雄性 Ilyoplax pusilla 在繁殖季节进行挥舞表演。然而,与许多招潮蟹(Uca 属)不同,该物种的挥舞展示功能尚不清楚。在短(10 厘米)和长(25 厘米)距离上使用挥动和静态爪模型进行实验,以研究流浪雌性对人工挥动信号的反应。在长距离选择实验中,假设向看不见的雌性无定向挥手作为广播挥手,雌性在非繁殖季节接近挥动和静止爪部分的可能性相同,但在非繁殖季节,更多的雌性(65 %)选择了挥动爪部分。繁殖季节。在短距离选择实验中,假设定向求爱向特定女性挥手,在非生殖季节,挥手和静态爪模型之间没有显着差异,但在生殖季节,明显更多的女性(88%)选择了挥爪。这些结果表明 I. pusilla 挥手展示的一个功能是吸引配偶,并且从短距离挥手更有效。
更新日期:2015-08-30
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