• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Ichthyology >Migration of juvenile and sub-adult Chinese sturgeon Acipenser sinensis Gray, 1835 in the Yangtze River, China below the Gezhouba Dam
【24h】

Migration of juvenile and sub-adult Chinese sturgeon Acipenser sinensis Gray, 1835 in the Yangtze River, China below the Gezhouba Dam

机译：1835年中华and小和亚成年on在葛洲坝下的长江中下游迁移

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

Acoustic telemetry data and recapture information were collected to study the distribution and migration of sub-adult and juvenile Chinese sturgeon Acipenser sinensis. From 2007 to 2012, 187 537 tagged cultured fish (4637 sub-adults and 182900 juveniles) were released at two sites on the Yangtze River. Subsequently, 482 fish were caught, comprising 198 cultured fish and 284 wild fish, mostly near sandbanks and sandbars with flat topography and slow water flow rates. Acoustic monitoring showed that a single sub-adult fish migrated upstream to the spawning grounds just below the Gezhouba Dam, a distance of 157km at an upstream ground speed of 0.40-1.40kmh(-1) (mean, 0.70kmh(-1)). Nine acoustically monitored sub-adults made a downstream migration of 45-1521km at a ground speed of 0.08-3.80kmh(-1). The ground migration speed of fish upstream to Wuhan (rkm 1678-1071) was significantly lower than that from Wuhan to the Yangtze estuary (rkm 1071-94). There was no significant difference in the ground migration speed between cultured and wild individuals. Knowledge of the movement and migration patterns of the stocked juvenile and sub-adult Chinese sturgeon will help to locate areas of the downstream channel in the lower reaches of the Yangtze River critical to the sturgeon and to evaluate the potential impact of the Three Gorges Dam on their downstream migration.
机译：收集了遥测数据和捕获信息，以研究中华st中华sub和亚成年ju的分布和迁移。从2007年到2012年，长江两处放养了187,537个带标签的养殖鱼（4637个亚成体和182900个幼鱼）。随后，捕获了482条鱼，其中包括198条养殖鱼和284条野生鱼，主要在沙洲和沙洲附近，地形平坦且水流速度缓慢。声学监测表明，一条亚成体鱼向上游迁移到葛洲坝大坝下方的产卵场，上游地面速度为0.40-1.40kmh（-1），距离为157km（平均0.70kmh（-1）） 。九名受声学监测的亚成人在地面速度为0.08-3.80kmh（-1）的情况下向下游迁移了45-1521 km。鱼类向武汉上游的地面迁移速度（rkm 1678-1071）明显低于从武汉到长江口的迁移速度（rkm 1071-94）。培养个体和野生个体之间的地面迁移速度没有显着差异。了解中华Chinese和亚成体stock鱼的运动和迁移方式，将有助于确定长江下游下游河床对urge鱼至关重要的区域，并评估三峡大坝对河床的潜在影响。他们的下游迁移。

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