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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Megalopae of the invasive crab Hemigrapsus sanguineus metamorphose in response to marine bionlms from different potential habitats
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Megalopae of the invasive crab Hemigrapsus sanguineus metamorphose in response to marine bionlms from different potential habitats

机译：入侵螃蟹Hemigrapsus sanguineus变形的巨足动物对来自不同潜在生境的海洋生物的反应

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摘要

Habitat characteristics favoring settlement and metamorphosis of larvae can affect the distribution and abundance of benthic marine invertebrates. Less selective responses to habitat cues by settling larvae can lead to broader distributions of species and potentially successful introduction to new geographic locations. This study tested whether marine biofilms, which serve as habitat cues for many invertebrates, enhance settlement and metamorphosis (molting) of megalopae of the invasive Asian shore crab Hemigrapsus sanguineus. Biofilms were allowed to develop on plastic mesh netting deployed in coastal locations with abundant rocky substrate (adult habitat) and estuarine locations with few rocks. Molting rates of laboratory-reared megalopae maintained with biofilm-covered netting were determined. Controls consisted of mesh netting without field-derived biofilms and seawater without netting. Experiments were also conducted with megalopae of a native species of estuarine mud crab, Dyspanopeus sayi, for comparison of responses. Both species molted faster in response to field biofilms regardless of habitat of biofilm development, although the response to biofilms compared to netting without biofilms was stronger for H. sanguineus than D. sayi. The broad response of megalopae of both species to biofilms suggests that positive responses to biofilms and physical structure could be important for successful colonization of crab species in general.
机译：有利于幼体沉降和变态的生境特征会影响底栖海洋无脊椎动物的分布和丰度。通过沉降幼虫对生境线索的选择性反应较差，可能导致物种分布更广泛，并有可能成功地引入新的地理位置。这项研究测试了作为许多无脊椎动物栖息地线索的海洋生物膜是否能增强亚洲入侵蟹Hemigrapsus sanguineus巨mega的定居和变态（蜕皮）。允许在布满多岩石的底物（成人栖息地）的沿海地区和少石的河口地区的塑料网上发展生物膜。确定了用生物膜覆盖的网维持的实验室饲养的巨lop的蜕皮率。对照包括不带田间生物膜的网状网和不带网的海水。为了比较反应，还对河豚泥蟹本地物种Dyspanopeus sayi的巨lop进行了实验。不管生物膜发育的栖息地如何，这两种物种对田间生物膜的反应都更快地蜕变，尽管血红黄吸虫对生物膜的反应比没有生物膜的网要强于D. sayi。两种物种的巨兽对生物膜的广泛反应表明，对生物膜和物理结构的积极反应通常对于成功定居蟹种很重要。

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    《Journal of Experimental Marine Biology and Ecology》 |2020年第3期|151294.1-151294.7|共7页
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    Univ Massachusetts Dartmouth MA 02747 USA;

    Manhattan Coll Riverdale NY 10471 USA;

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