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首页> 外文期刊>Marine ecology >Shell use by sympatric hermit crab species in a seasonally open coastal lagoon in Northeastern Brazil
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Shell use by sympatric hermit crab species in a seasonally open coastal lagoon in Northeastern Brazil

机译：在巴西东北部季节性开放的沿海泻湖中，同胞寄居蟹物种使用贝壳

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There are gaps in what is known about the patterns of gastropod shell use by hermit crabs in Brazilian lagoon areas, especially in Northeastern Brazil. However, this is important because the understanding of selection patterns provides information on life history and eco-evolutionary conceptions of paguroids. The present study investigated the use of gastropod shells occupied by Pagurus criniticornis and Clibanarius sclopetarius in a coastal lagoon seasonally connected to an estuary and to the sea, correlating eco-evolutionary aspects and hydrodynamic characters. The study was carried out between February 2013 and January 2014. Hermit crabs and their shells were identified and measured (hermit crabs' cephalothorax shield length and width, major propodus length and height, weight, shell total length and width, shell aperture length and width). Partial least squares regression was used to analyse the morphometric data. Additionally, a multinomial proportions test was performed to infer patterns (inter-/intra-specific) of shells' occupation. Hermit crab species occupied a total of 13 types of shells, predominantly those of Neritina virginea (67.83%). The shell weight was the most important determinant of shell occupancy in the morphometric model (variable importance in projection >1). The proportions of N. virginea shells used were similar in both species of hermit crabs, except between the sexes of P. criniticornis. Presumably, the high utilization rate of N.virginea shells is related to its abundance and dispersal, and to the shells' suitability for hermit crabs, which is reflected by the morphometric model, as well as by the hydrodynamics of the lagoon-estuarine environment. The relative occupation of different types of shells for each species of hermit crabs studied appears to be associated with regulation by inter-/intra-specific competition, which fosters the co-occurrence of those populations. These results endorse coastal lagoons as a refuge and recruitment area for aquatic fauna. In addition, it highlights a challenge in the management and conservation of paguroid species whose population dynamics depend on the resources coming from the Gastropoda community.
机译：在巴西泻湖地区，特别是巴西东北部地区，寄居蟹使用腹足动物贝壳的方式所知尚有差距。但是，这很重要，因为对选择模式的理解可以提供有关生命的信息以及paguroids的生态进化概念的信息。本研究调查了在季节性与河口和海洋相连的沿海泻湖中，Pagurus criniticornis和Clibanarius sclopetarius所占据的腹足动物贝壳的利用，并将其生态进化方面和水动力特征联系起来。该研究在2013年2月至2014年1月之间进行。鉴定并测量了寄居蟹及其壳（寄居蟹的头胸盾的长度和宽度，主要食足的长度和高度，重量，壳的总长度和宽度，壳的开口长度和宽度） ）。使用偏最小二乘回归分析形态计量学数据。此外，还进行了多项比例测试以推断炮弹的占领方式（特定/特定范围内）。寄居蟹种类总共占据了13种贝壳，主要是奈里提纳河虾（Neritina virginea）的贝壳（67.83％）。在形态计量学模型中，壳的重量是壳占据的最重要的决定因素（投影中的重要性> 1）。在这两种寄居蟹中，所使用的N. virginea贝壳的比例均相似，只是在P. criniticornis的性别之间。据推测，N.virginea贝壳的高利用率与其丰富度和扩散性有关，还与贝壳对寄居蟹的适宜性有关，这由形态模型以及泻湖-河口环境的水动力反映出来。研究的每种寄居蟹物种不同种类贝壳的相对占领似乎与种间/种内竞争的调控有关，这促进了这些种群的共生。这些结果证明沿海泻湖是水生动物的避难所和募集区。此外，它突显了paguroid物种的管理和保护方面的挑战，其种群动态取决于腹足纲动物群落的资源。

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