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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Adult density affects larval recruitment in the calyptraeid gastropod Crepidula fornicata
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Adult density affects larval recruitment in the calyptraeid gastropod Crepidula fornicata

机译：幼虫密度的增加影响成年Ac科乌贼扮演了克雷皮杜拉

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摘要

Like many other marine invertebrate larvae, those of Crepidula fomicata metamorphose in response to a waterborne cue or cues from conspecific adults. However, the relationship between adult density and larval metamorphosis has not been quantified. Around Long Island, New York, U.S.A., C. fomicata occurs patchily, sometimes at very high densities. The density of adult C. fomicata was experimentally manipulated in the field and larval recruitment was measured. Recruitment increased with increasing adult density, consistent with previous laboratory results demonstrating that larvae settle in response to waterborne cues from conspecific adults. Larvae showed a threshold response to adult cues on the scale of meters, and select adult conspecifics over a control substrate at smaller scales. These results indicate that recruitment in populations of C. fomicata with densities below the threshold of detection may be limited by the ability of larvae to find conspecific adults, which in turn may affect population dynamics at range edges by limiting the species' rate of expansion. (C) 2015 Elsevier B.V. All rights reserved.
机译：像许多其他海洋无脊椎动物幼虫一样，Crepidula fomicata变态的幼虫也可以响应成年成虫的水生线索。但是，成虫密度与幼虫变态之间的关系尚未量化。美国纽约州长岛附近的C. fomicata零星分布，有时密度很高。成年C. fomicata的密度在现场进行了实验操作，并测量了幼虫的募集。随着成年人密度的增加，招募也增加了，这与以前的实验室结果一致，表明幼虫对来自成年成虫的水生线索做出了反应。幼虫在米尺度上显示出对成年线索的阈值响应，并在较小尺度上在对照基质上选择成年同种菌。这些结果表明，密度低于检测阈值的富密梭菌种群的募集可能受到幼虫寻找同种成年的能力的限制，这反过来又可能会通过限制物种的扩张速度而影响范围边缘的种群动态。 （C）2015 Elsevier B.V.保留所有权利。

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