• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Fisheries Research >Structure and biological characteristics of purse seine landings offthe Lebanese coast (eastern Mediterranean)
【24h】

Structure and biological characteristics of purse seine landings offthe Lebanese coast (eastern Mediterranean)

机译：黎巴嫩沿海（地中海东部）围网钱包围网登陆的结构和生物学特征

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

Small pelagic fishes constitute most of the fish caught in the Mediterranean Sea and two thirds of the Lebanese landings. In this study, we present some biological parameters for the most common species collected during the fishing season. In Lebanon, juvenile pelagic fishes are attracted to floating lights and captured using purse seine nets. At least 32 species were collected but only 11 (mainly Engraulis encrasicolus, Sardina pilchardus, Sardinella aurita and Scomber japonicus) represented most of the catches. Weight- length relationships and different condition indices for common species were calculated. Most landed fishes were juveniles with a mean size of 11.3 +/- 8.8 cm TL. Fish conditions exhibited a similar temporal pattern with a minimum recorded in July, probably due to interspecific food competition in the nurseries. The monitored fishing vessel landed about 15 tonnes of juvenile fishes during the 4-month fishing season while fishing effort remained constant. Size-ranges and length-frequency distributions showed that the dominant sizes ranged between 6 and 8 cm TL and that harvested fishes are smaller than the minimum size fished in neighbouring Mediterranean countries. The Lebanese purse seine fishery targets 0 age-class juvenile of many fishes in the nurseries, which is against sustainable fishing practices and has a potential impact on pelagic fish communities in the eastern Mediterranean.
机译：小型中上层鱼类占地中海捕捞的大部分鱼类，占黎巴嫩登陆区的三分之二。在这项研究中，我们介绍了在捕鱼季节收集的最常见物种的一些生物学参数。在黎巴嫩，浮游幼鱼被漂浮的灯光所吸引，并使用围网围网捕捞。至少收集了32种，但只有11种（主要是Engraulis encrasicolus，Sardina pilchardus，Sardinella aurita和Scomber japonicus）代表了大部分捕获量。计算了常见物种的体重-长度关系和不同条件指数。大多数着陆鱼类是平均尺寸为11.3 +/- 8.8厘米TL的幼鱼。鱼类状况表现出相似的时间格局，最低水平是7月，这可能是由于苗圃间的种间食物竞争所致。在四个月的捕捞季节中，受监测的渔船降落了约15吨幼鱼，而捕捞努力保持不变。大小范围和长度-频率分布表明，主要大小在6至8厘米TL之间，并且所捕捞的鱼小于邻国地中海国家捕捞的最小鱼。黎巴嫩围网围网捕捞的目标是苗圃中许多鱼类的0岁龄少年，这违背可持续的捕捞习惯，并可能对地中海东部的中上层鱼类群落产生潜在影响。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
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