Microhabitat use and prey selection of the coral-feeding snail Drupella cornus in the northern Red Sea
Microhabitat use and prey selection of the coral-feeding snail Drupella cornus in the northern Red Sea
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DOI：
10.1007/s10750-009-0053-x
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发表时间：
2010-01
期刊：
影响因子：
2.6
通讯作者：
V. Schoepf;J. Herler;M. Zuschin
中科院分区：
文献类型：
--
作者：
V. Schoepf;J. Herler;M. Zuschin
德鲁佩拉属的食珊瑚腹足动物因在整个印度-太平洋地区种群爆发而闻名。尽管它们有可能破坏大面积的珊瑚礁，但从未对猎物的偏好进行过关于猎物可用性的分析，幼体生态和食物选择性仍然很大程度上未知。在这里，水深、珊瑚丰度、群体形状、猎物种类和蜗牛种内吸引力对分布模式、猎物选择和微生境利用的影响。在红海北部对山茱萸进行了研究。特别强调个体发生差异。蜗牛在最浅的礁石区（1 m 深）最为丰富。成体与多种基质和珊瑚生长形式有关，而幼体则高度隐秘，仅限于活的分枝珊瑚。鹿角珊瑚属明显优于其他顶孔珊瑚和细孔珊瑚。资源选择比显示，Acropora acuminata是幼虫的偏好，A.塞拉戈比成人。在水族馆实验中，两个生命阶段的种内吸引力都很高。总体而言，幼年和成年珊瑚的微生境和猎物利用的显着差异表明幼年珊瑚有更具体的栖息地要求，并表明对珊瑚群落的生态影响不同于成年珊瑚。猎物偏好似乎取决于珊瑚属和群体形状。顶孔珊瑚提供了食物和住所的最佳组合，因此决定了珊瑚的分布模式。山茱萸。
Corallivorous gastropods of the genusDrupellaare known for population outbreaks throughout the Indo-Pacific region. Despite their potential to destroy wide areas of coral reef, prey preferences have never been analyzed with respect to prey availability, and juvenile ecology and food selectivity remain largely unknown. Here, the influence of water depth, coral abundance, colony shape, prey species, and intraspecific attraction among snails on distribution patterns, prey selection, and microhabitat use ofD. cornuswas studied in the northern Red Sea. Special emphasis was put on ontogenetic differences. The snails were most abundant in the shallowest reef zone (1 m depth). Adults were associated with several substrates and coral growth forms, whereas juveniles were highly cryptic and restricted to live branching corals. The genusAcroporawas significantly preferred over other acroporid and pocilloporid corals. As revealed by resource selection ratios,Acropora acuminatawas preferred by juveniles,A. selagoby adults. In aquarium experiments, intraspecific attraction was high among both life stages. Overall, significant differences in juvenile and adult microhabitat and prey use suggest that juveniles have more specific habitat requirements, and indicate ecological impacts on coral communities different from that of adults. Prey preferences seem to depend on both coral genus and colony shape.Acroporacorals provide the best combination of food and shelter and therefore determine distribution patterns ofD. cornus.