当前位置: X-MOL 学术J. Exp. Mar. Biol. Ecol. › 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.)
The role of adult fiddler crab environmental acoustic cues and chemical cues in stimulating molting of field-caught megalopae
Journal of Experimental Marine Biology and Ecology ( IF 2 ) Pub Date : 2021-02-06 , DOI: 10.1016/j.jembe.2021.151516
Emily E. Waddell , Wendy E.D. Piniak , Kathleen A. Reinsel , James M. Welch

In mid-Atlantic estuaries, three fiddler crab species, Uca pugilator, Uca pugnax and Uca minax, co-occur, with their adults occupying different habitat types distinguished by salinity and sediment size. Some evidence exists that selective settlement is responsible for this separation but the mechanism is largely unknown. We tested the hypothesis that field-caught megalopae would be stimulated to molt in the presence of adult species-specific environmental acoustic cues and conspecific chemical cues. We placed megalopae in seawater with and without adult chemical cues, exposed them to one of three sound treatments for 8 days, and recorded the time each megalopa took to metamorphose. Time to molt was unaffected by sound treatment either alone or in combination with chemical cues. In the absence of adult chemical cues, very few megalopae molted regardless of the sound treatment. Molting in the presence of habitat sound and chemical cues varied by species. Many U. pugilator molted in all sound and odor combinations, including the no odor and no sound treatment, and molted sooner in conspecific and congeneric odors. U. pugnax was stimulated to molt by chemical cues from either U. pugilator or U. pugnax, but molting was similar across sound treatments. Lastly, due to the small number of U. minax in the experiment, no statistical analyses or conclusions could be made. Our results do not support the hypothesis that sound stimulates molting of fiddler crab megalopae, but provide additional evidence that chemical odors from adults act as molting cues.



中文翻译:

成年提琴蟹环境声学线索和化学线索在刺激田间捕获的巨mega蜕皮中的作用

在大西洋中部河口,有三种招潮蟹:Uca pugilator,Uca pugnaxUca minax,共同发生,其成虫居住在不同的生境类型中,这些生境类型以盐度和沉积物大小为特征。存在一些证据表明选择性沉降是造成这种分离的原因,但机理尚不清楚。我们测试了这样的假设:在存在成年物种特定的环境声学提示和同种化学提示的情况下,田间捕获的巨lop将被刺激蜕皮。我们在有或没有成人化学线索的情况下将巨lop放在海水中,将它们暴露于三种声音处理之一,持续8天,并记录了每一个半乳糖变质所花费的时间。单独或与化学提示结合进行声音处理不会影响蜕皮时间。在没有成人化学提示的情况下,无论进行何种声音处理,很少有巨mega蜕变。存在栖息地的蜕皮声音和化学线索因物种而异。许多U. pugilator会在所有声音和气味组合中融化,包括无异味和无声音处理,并且会在同种异物和同种异味中更快地融化。U. pugilatorU. pugnax产生的化学暗示刺激了U. pugnax蜕皮,但是在声音处理中蜕皮是相似的。最后,由于实验中的U. minax数量很少因此无法做出统计分析或结论。我们的研究结果不支持声音刺激小提琴蟹蜕壳的假说,但提供了其他证据表明成年的化学气味起蜕皮提示的作用。

更新日期:2021-02-07
down
wechat
bug