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首页> 美国卫生研究院文献>other >Small-scale spatial variation in population- and individual-level reproductive parameters of the blue-legged hermit crab Clibanarius tricolor
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Small-scale spatial variation in population- and individual-level reproductive parameters of the blue-legged hermit crab Clibanarius tricolor

机译：蓝脚寄居蟹Clibanarius tricolor种群和个体水平繁殖参数的小范围空间变异

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摘要

Management of the few regulated ornamental fisheries relies on inadequate information about the life history of the target species. Herein, we investigated the reproductive biology of the most heavily traded marine invertebrate in the western Atlantic; the blue-legged hermit crab Clibanarius tricolor. We report on density, individual-level, and population-level reproductive parameters in 14 populations spanning the Florida Keys. In C. tricolor, abundance, population-level, and individual-level reproductive parameters exhibited substantial small-scale spatial variation in the Florida Keys. For instance, the proportion of brooding females varied between 10–94% across localities. In females, average (±SD) fecundity varied between 184 (±54) and 614 (±301) embryos crab-1 across populations. Fecundity usually increases with female body size in hermit crabs. However, we found no effect of female body size on fecundity in three of the populations. Altogether, our observations suggest that C. tricolor may fit a source-sink metapopulation dynamic in the Florida Keys with low reproductive intensity and absence of a parental body size—fecundity relationship resulting in net reproductive loses at some localities. We argue in favor of additional studies describing population dynamics and other aspects of the natural history of C. tricolor (e.g., development type, larval duration) to reveal ‘source’ populations, capable of exporting larvae to nearby populations. Our observations imply that future studies aimed at assessing standing stocks or describing other aspects of the life history of this hermit crab need to focus on multiple localities simultaneously. This and future studies on the reproductive biology of this species will form the baseline for models aimed at assessing the stock condition and sustainability of this heavily harvested crustacean.
机译：对少数受监管的观赏渔业的管理依赖于有关目标物种生命史的信息不足。在这里，我们调查了西大西洋交易最多的海洋无脊椎动物的生殖生物学。蓝脚寄居蟹Clibanarius三色。我们报告了跨越佛罗里达群岛的14个人口的密度，个体水平和人口水平的生殖参数。在三色梭菌中，在佛罗里达礁岛，丰度，种群水平和个体水平的繁殖参数显示出小规模的实质性空间变化。例如，各地育雏的女性比例在10％至94％之间。在雌性中，不同种群的平均繁殖力在184（±54）和614（±301）个胚蟹1之间变化。繁殖力通常随寄居蟹中雌性体型的增加而增加。然而，我们发现在三个人群中女性体型对生殖力没有影响。总而言之，我们的观察结果表明，三色梭菌可能适合佛罗里达州的源库转移种群动态，繁殖强度低，且没有亲代体型—生殖力关系，导致某些地方出现净生殖损失。我们主张进行其他研究来描述种群动态和三色梭菌自然史的其他方面（例如发育类型，幼虫持续时间），以揭示能够将幼体输出到附近种群的“源”种群。我们的观察结果表明，旨在评估种群数量或描述此寄居蟹生活史其他方面的未来研究需要同时关注多个地区。有关该物种生殖生物学的这项研究以及将来的研究，将成为旨在评估这种大量收获的甲壳类动物的种群状况和可持续性的模型的基线。

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