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首页> 外文期刊>Estuarine Coastal and Shelf Science >Chemical induction in mangrove crab megalopae, Ucides cordatus (Ucididae): Do young recruits emit metamorphosis-triggering odours as do conspecific adults?
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Chemical induction in mangrove crab megalopae, Ucides cordatus (Ucididae): Do young recruits emit metamorphosis-triggering odours as do conspecific adults?

机译：红树林蟹巨蟹科（Ucides cordatus）的化学诱导作用：新兵是否像同种成年人一样散发出触发变态的气味？

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摘要

In many brachyuran species, including the mangrove crab Ucides cordatus, water-soluble chemicals (odours) emitted by adult residents trigger metamorphosis of megalopae, probably facilitating habitat selection and settlement near conspecific crab population. New field findings revealed that early benthic crab stages co-inhabit burrows of both juveniles and adults of U. cordatus which raised the question whether megalopae are also stimulated by sexually immature juveniles. Therefore, we tested in an experimental laboratory study the hypothesis that small benthic recruits and older juveniles also emit metamorphosis-stimulating odours as do conspecific adult crabs. U. cordatus megalopae were cultivated in eight conspecific odour-treatments containing seawater previously conditioned with crabs of different carapace widths (CW 0.15-5.0 cm) and in a control treatment with filtered seawater not conditioned with crabs. In all odour-treatments, including those with small immature crabs, the percentage of metamorphosed larvae was significantly higher (≥74%) and the average development was shorter (15.8 -19.3 days) than in the control group, where only 30% moulted after 25.6 ± 6.6 days of megalopal development. In addition, megalopae developed 2.7 days faster when exposed to odours from young and older juveniles compared to those larvae kept in contact with odours from conspecific adults. Our results clearly demonstrate that the emission of metamorphic odours in U. cordatus is independent of size/age or sexual maturity. The responsiveness of megalopae to chemicals emitted by resident crabs of varying ages should aid the natural recovery of U. cordatus populations in areas significantly affected by size-selective fishery where only large conspecific adults are harvested.
机译：在许多腕足动物物种中，包括红树林蟹Ucides cordatus，成年居民释放的水溶性化学物质（气味）触发了巨lop的变态，这可能有助于栖息地的选择和定居蟹种群附近的定居。新的田间调查发现表明，底栖蟹的早期阶段同时存在于脐带U和成年U的洞穴中，这引发了一个问题，即性未成熟的幼体是否也刺激了巨lop。因此，我们在实验实验室研究中检验了以下假设：即同底成年螃蟹一样，小型底栖动物和年幼的幼体也会散发出刺激变态的气味。在八种同种异味处理中培养了巨型脐带藻，该处理包含预先用不同甲壳宽度（CW 0.15-5.0 cm）的螃蟹处理过的海水，以及在对照处理中用未经螃蟹处理过的过滤海水。在所有气味处理中，包括那些未成熟的小螃蟹，变态幼虫的百分比均显着较高（≥74％），平均发育时间较短（15.8 -19.3天），而对照组仅在蜕皮后蜕变了30％巨眼发育25.6±6.6天。此外，与保持接触成年成年气味的幼虫相比，暴露于幼年和年幼少年的气味时，巨lop的发育速度快了2.7天。我们的结果清楚地表明，脐带血中变态气味的散发与大小/年龄或性成熟无关。巨蟹科对不同年龄的居所蟹释放的化学物质的反应能力应有助于在受大小选择渔业影响很大的地区（仅捕捞大型同种成年）的地方，脐带cord种群的自然恢复。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2013年第10期|264-270|共7页
  • 作者

    Darlan de Jesus de Brito Simith; Fernando Araujo Abrunhosa; Karen Diele;

  • 作者单位

    Laboratorio de Carcinologia, Instituto de Estudos Costeiros (IECOS), Universidade Federal do Para (UFPa), Campus Universitario de Braganca, AlamedaLeandro Ribeiro s, Aldeia, 68600-000 Braganca, Para, Brazil,Laboratorio de Ecologia de Manguezal (LAMA), Instituto de Estudos Costeiros (IECOS), Universidade Federal do Para (UFPa), Campus Universitario deBraganca, Alameda Leandro Ribeiro s, Aldeia, 68600-000 Braganca, Par&, Brazil;

    Laboratorio de Carcinologia, Instituto de Estudos Costeiros (IECOS), Universidade Federal do Para (UFPa), Campus Universitario de Braganca, AlamedaLeandro Ribeiro s, Aldeia, 68600-000 Braganca, Para, Brazil;

    Edinburgh Napier University, School of Life, Sport and Social Sciences, Edinburgh EH11 4BN, UK,Leibniz-Center for Tropical Marine Ecology (ZMT), Fahrenheitstrasse 6, 28359 Bremen, Germany;

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  • 正文语种 eng
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  • 关键词

    juveniles; larval settlement; mangrove crab; metamorphosis; recruitment; sexual maturity;

    机译：少年幼虫沉降红树林蟹变态;招聘;性成熟;

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