• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Ichthyology >Growth, Size-Age Structure of Catches and Reproduction of the Volga Zander Sander volgensis (Percidae) in the Upper Part of the Volga Stretch of the Kuibyshev Reservoir
【24h】

Growth, Size-Age Structure of Catches and Reproduction of the Volga Zander Sander volgensis (Percidae) in the Upper Part of the Volga Stretch of the Kuibyshev Reservoir

机译：居比雪夫水库伏尔加河伸展带上部伏尔加河桑德·桑德·伏尔加斯河（Percidae）的生长，大小-年龄结构和繁殖

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

Conditions of reproduction, size—age structure of catches, and the growth of the Volga zander Sunder volgensis in the upper part of the Volga stretch of the Kuibyshev Reservoir from 2002 to 2007, as well as its fishery in this water body, are considered. A decrease in catches of the proportion of large elder age groups of the Volga zander in the period of destabilization of the reservoir ecosystem, as compared to the phase of its relative stabihzation from the 1970s to the 1980s, and a decrease in the commercial catch were estabhshed. Besides, retardation of its growth in connection with the deterioration of the ecological situation is observed, but the average level of reproduction is retained, which at the organization of rational fishery can lead to the restoration of the Volga zander stock.
机译：考虑了2002-2007年居比雪夫水库伏尔加河上游的伏尔加河鲈的繁殖条件，大小-渔获物的年龄结构以及其生长，以及在该水体中的捕捞条件。与1970年代至1980年代的相对稳定阶段相比，在水库生态系统不稳定时期，伏尔加zander大型老年人群所占比例的减少，而商业捕捞量则有所减少。建立。此外，观察到由于生态状况恶化而使其生长受到阻碍，但保留了平均繁殖水平，这在合理的渔业组织下可导致伏尔加河鲈种群的恢复。

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