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The ecology of the bar bellied sea snake (Hydrophis elegans) in Shark Bay, Western Australia.

机译:棒的生态鼓起了在澳大利亚西部鲨鱼湾的海蛇(Hydrophis elegans)。

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摘要

This thesis examines factors underlying habitat use of the sea snake Hydrophis elegans and nearshore fish in Shark Bay, Western Australia. Differences in morphology, life history and diet between H. elegans and a sympatric sea snake, Disteria major, may facilitate co-existence by reducing competition through inter-specific resource partitioning. Morphological differences between sexes of H. elegans may reduce intraspecific competition. Tidal state may cause changes in predation risk and prey availability. Field observations showed that at low tide H. elegans foraged over shallow sand flats, which are inaccessible to the predatory tiger shark (Galeocerdo cuvier ). At high tide, snakes and their potential prey (small fish) moved to deeper seagrass habitats, suggesting that these habitats grant snakes increased safety from predation, as well as access to potential prey. This is more likely true for D. major, because H. elegans appears to specialize on snake-eels (Family Ophichthidae), which occur mainly in sand habitats.
机译:本文探讨了西澳大利亚鲨鱼湾海蛇秀丽隐杆线虫和近岸鱼类栖息地利用的影响因素。秀丽隐杆线虫和同属海蛇Disteria major在形态,生活史和饮食上的差异可能会通过种间资源划分减少竞争,从而促进共存。秀丽隐杆线虫性别之间的形态学差异可能会减少种内竞争。潮汐状态可能会导致捕食风险和猎物可用性的变化。野外观察表明,在低潮时,秀丽隐杆线虫在浅滩沙地上觅食,这是掠食性虎鲨(Galeocerdo cuvier)无法接近的。在涨潮时,蛇及其潜在的猎物(小鱼)移至更深的海草栖息地,这表明这些栖息地使蛇免受捕食以及进入潜在猎物的安全性提高。这对于D. major更可能是正确的,因为秀丽隐杆线虫似乎专门研究蛇鳗(蛇O科),其主要发生在沙地中。

著录项

  • 作者

    Kerford, Megan.;

  • 作者单位

    Simon Fraser University (Canada).;

  • 授予单位 Simon Fraser University (Canada).;
  • 学科 Biology Ecology.; Biology Zoology.; Agriculture Fisheries and Aquaculture.
  • 学位 M.Sc.
  • 年度 2005
  • 页码 85 p.
  • 总页数 85
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 生态学(生物生态学);动物学;水产、渔业;
  • 关键词

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