Scholarlink

<p>Sharks are one the most threatened chondrichthyan taxa in the marine environment comprising high ecological, economic, and cultural significance. In India, a substantial quantity of shark landings occurs as bycatches through trawl and gillnet fisheries. However, there are limited findings about the species composition, size distribution, and levels of shark-gear interactions. The present study aimed to fill this knowledge gap through the estimation of length-weight relationships and condition factors for six shark species, viz., <i>Carcharhinus falciformis</i>, <i>C. limbatus</i>, <i>C. melanopterus</i>, <i>Sphyrna lewini</i>, <i>Alopias vulpinus</i> and <i>A. superciliosus</i>, from the tuna gillnet and trawl net fishery at three major fish landing centers along the southeast coast of India from January to December 2022. The results indicate that the estimated allometric coefficient (<i>b</i>) and the condition factor (Kn) for all six species ranged from 2.66 to 3.26 and 1.02 to 1.28 respectively. Understanding key aspects of biology and ecology is a crucial step toward conserving the declining population of these iconic predators which the study aims to emphasize.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Morphometric Relationships of Six Vulnerable Sharks from the Southern Coast of India

  • 期刊论文

  • 发表日期：

    2025年1月14日

查看全文
  • T. Mohanraj,
  • T. Jebarani Rajathy,
  • S. R. T. Sherly Cross

摘要

Sharks are one the most threatened chondrichthyan taxa in the marine environment comprising high ecological, economic, and cultural significance. In India, a substantial quantity of shark landings occurs as bycatches through trawl and gillnet fisheries. However, there are limited findings about the species composition, size distribution, and levels of shark-gear interactions. The present study aimed to fill this knowledge gap through the estimation of length-weight relationships and condition factors for six shark species, viz., Carcharhinus falciformis, C. limbatus, C. melanopterus, Sphyrna lewini, Alopias vulpinus and A. superciliosus, from the tuna gillnet and trawl net fishery at three major fish landing centers along the southeast coast of India from January to December 2022. The results indicate that the estimated allometric coefficient (b) and the condition factor (Kn) for all six species ranged from 2.66 to 3.26 and 1.02 to 1.28 respectively. Understanding key aspects of biology and ecology is a crucial step toward conserving the declining population of these iconic predators which the study aims to emphasize.