Scholarlink

Abstract <p>The four-eyed sleeper, <i>Bostrychus sinensis</i> Lacépède, 1801, has highly commercial value in fisheries, however its reproductive characteristics in the wild are poorly known in Vietnam, especially Xuan Thuy National Park in northern Vietnam, which is a hotspot of conservation since it is home to many commercial fish, consisting of <i>Bostrychus sinensis</i>. Therefore, this study attempted to describe reproductive indices of <i>B.&#xa0;sinensis</i> in Xuan Thuy National Park using 210 samples collected monthly from 2018 to 2019. The gonadosomatic index of females and males is highest in May (11.23 and 0.21%) and lowest in December (0.51 and 0.06%). On the contrary, the hepatosomatic index of females was lowest in May and September (2.14%), and highest in December (3.96%). For males, the hepatosomatic index value ranged from 1.7% (May) to 3.03% (March). The present study also identified the absolute potential fecundity of females ranging from 4215 to 28 643 oocytes; the relative potential fecundity was between 244 to 639 oocyte/g. Thus, these findings reveal that the four-eyed sleeper in the study site is batch spawner, with a peak in May, and in September. In addition, this work provides reproductive data on the <i>B. sinensis</i>, thus contributing to the conservation and proper exploitation of four-eyed sleeper populations in Vietnam.</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

Annual Reproductive Cycles and Fecundity of Four-Eyed Sleeper Bostrychus sinensis (Butidae) in a Mangrove Forest National Park from Northern Vietnam

  • 期刊论文

  • 发表日期：

    2025年3月31日

查看全文
  • D. H. Tran,
  • T. T. Ta,
  • A. T. Le,
  • V. L. Pham,
  • L. C. Do

摘要

Abstract

The four-eyed sleeper, Bostrychus sinensis Lacépède, 1801, has highly commercial value in fisheries, however its reproductive characteristics in the wild are poorly known in Vietnam, especially Xuan Thuy National Park in northern Vietnam, which is a hotspot of conservation since it is home to many commercial fish, consisting of Bostrychus sinensis. Therefore, this study attempted to describe reproductive indices of B. sinensis in Xuan Thuy National Park using 210 samples collected monthly from 2018 to 2019. The gonadosomatic index of females and males is highest in May (11.23 and 0.21%) and lowest in December (0.51 and 0.06%). On the contrary, the hepatosomatic index of females was lowest in May and September (2.14%), and highest in December (3.96%). For males, the hepatosomatic index value ranged from 1.7% (May) to 3.03% (March). The present study also identified the absolute potential fecundity of females ranging from 4215 to 28 643 oocytes; the relative potential fecundity was between 244 to 639 oocyte/g. Thus, these findings reveal that the four-eyed sleeper in the study site is batch spawner, with a peak in May, and in September. In addition, this work provides reproductive data on the B. sinensis, thus contributing to the conservation and proper exploitation of four-eyed sleeper populations in Vietnam.