...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Ichthyology >Life history traits of the striped seabream Lithognathus mormyrus (Pisces, Sparidae) from two coastal fishing grounds in the Strait of Sicily
【24h】

Life history traits of the striped seabream Lithognathus mormyrus (Pisces, Sparidae) from two coastal fishing grounds in the Strait of Sicily

机译：来自西西里岛海峡两个沿海渔场的条纹鲷（Lithognathus mormyrus）（双鱼，Spa科）的生活史特征

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Striped seabream Lithognathus mormyrus [n = 1269; total lengths (TLs) = 112-350 mm] were investigated in two coastal Sicilian fishing grounds (central Mediterranean Sea). Samples were collected from the two landing harbours, Licata and Selinunte, between October 1999 and September 2000. Seasonal and spatial variations in population structure, age, growth, reproduction and mortality were studied. It was found that seasonal differences in the main modes of length-frequency distributions corresponded well with the seasonal growth. The recruits in Licata grew faster and attained a larger size (by 10-20 mm) at ages up to 2 years than in Selinunte. Growth thereafter was relatively slow, with Selinunte specimens growing at a slightly faster rate. Spawning occurred between June and August. Length at the first maturity was different between females and males in the Selinunte (190181 mm) and Licata (183-171 mm) fishing grounds. The species displayed protandrous hermaphroditism, and somatic growth practically ceased during the period of sex inversion. Total fishing mortality was considerably higher in Licata (F between 0.53 and 0.63 per year) than in Selinunte (F between 0.22 and 0.29 per year). Therefore it is suggested that the striped seabream population in Licata is more vulnerable to overfishing than that in Selinunte.
机译：条纹鲷鲷Lithognathus mormyrus [n = 1269;总长度（TLs = 112-350 mm）在两个西西里沿海渔场（地中海中部）进行了调查。在1999年10月至2000年9月之间，从两个登陆港Licata和Selinunte收集了样本。研究了人口结构，年龄，生长，繁殖和死亡率的季节性和空间变化。发现长度-频率分布的主要模式中的季节差异与季节增长非常吻合。利卡塔（Licata）的新兵成长快，到2岁时的身材比塞利南特（Siluntunte）大（10-20毫米）。此后的生长相对较慢，而Selinunte标本的生长速度略快。产卵发生在六月和八月之间。 Selinunte（190181毫米）和Licata（183-171毫米）渔场的雌雄初生时长不同。该物种显示出前雌雄同体性，并且在性倒置期间实际上停止了体细胞生长。利卡塔的总捕鱼死亡率（每年F在0.53至0.63之间）比塞利南德（每年F在0.22至0.29之间）高得多。因此，建议在利卡塔的条纹鲷鱼种群比塞利南德更容易过度捕捞。

著录项

相似文献

  • 外文文献
  • 中文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号