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首页> 外文期刊>Marine biology >Discarded queen conch (Strombus gigas) shells as shelter sites for fish
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Discarded queen conch (Strombus gigas) shells as shelter sites for fish

机译：丢弃的海螺海螺（Strombus gigas）贝壳作为鱼的庇护所

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Within the Caribbean millions of queen conch (Strombus gigas Linnaeus) are harvested each year and shells discarded randomly or as middens. Fish use of discarded conch shells was investigated in four different habitat types: sand, seagrass beds, mangrove forests, and coral reefs. The study was carried out in the waters off South Caicos, Turks and Caicos Islands (TCI), between October 2003 and January 2004. The density of discarded shells was greatest near coral reefs; however, the percentage of shells occupied by adult fish was higher in isolated shells on sand and in mangrove habitats. Juvenile fish also showed a preference for sheltering in conch shells relative to other microhabitat types on sandy plains and in mangrove and seagrass habitats. Differences in use of single shells by fish in different habitats were attributed to differences in piscivore abundance and habitat complexity. Although not all isolated shells were occupied by fish, all conch middens deposited by fishermen had fish inhabitants. Examination of fish use of conch middens in three habitat types and conch piles of one, three, and five shells constructed on sand found both fish diversity and abundance increased on conch middens of increasing size. This study suggests that disposal of conch shells as large middens in habitats of low complexity will increase the amount of shelter present and may enhance fish populations in these habitats.
机译：加勒比海地区每年收获数百万只海螺（Strombus gigas Linnaeus），贝壳随机或作为中空丢弃。在四种不同的栖息地类型中调查了废弃海螺贝壳对鱼类的利用：沙，海草床，红树林和珊瑚礁。这项研究是在2003年10月至2004年1月之间在南凯科斯，特克斯和凯科斯群岛（TCI）附近的水域中进行的。丢弃的贝壳密度在珊瑚礁附近最大。然而，成年鱼所占据的贝壳百分比在沙子和红树林栖息地的孤立贝壳中较高。相对于沙质平原上的其他微生境类型以及红树林和海草生境而言，幼鱼还表现出相对于其他微生境类型的偏好。鱼在不同生境中使用单壳的差异归因于食肉动物的丰度和生境复杂性的差异。尽管并非所有孤立的贝壳都被鱼占据，但渔民存放的所有海螺中都有鱼类。在三种生境类型中对海螺鱼类的鱼类利用情况进行检查，并在沙子上建造一，三，五个贝壳的海螺堆，发现随着大小的海螺鱼类鱼类多样性和丰度增加。这项研究表明，在低复杂度的栖息地中将海螺贝壳作为大片中位数的处置将增加现有庇护所的数量，并可能增加这些栖息地中的鱼类种群。

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