• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>International Symposium on Advances in Fish Tagging and Marking Technology >In-Stream Monitoring of PIT-tagged Wild Spring/Summer Chinook Salmon Juveniles in Valley Creek, Idaho
【24h】

In-Stream Monitoring of PIT-tagged Wild Spring/Summer Chinook Salmon Juveniles in Valley Creek, Idaho

机译：在谷溪，爱达荷州山谷河夏天的野生春天/夏季奇努克三文鱼少年

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Recent advances in passive integrated transponder (PIT) tag technology have allowed the development of in-stream fish-monitoring systems. We installed two such systems in Valley Creek near its confluence with the Salmon River in summer 2002. In the summers of 2003-2005 we collected and PIT tagged wild spring/ summer Chinook salmon parr Oncorhynchus tshawytscha in natal rearing areas upstream from the monitors. Although subsequent detection numbers between fall 2003 and spring 2006 were low and variable, they were sufficient to determine timing and estimate survival. We defined migrational groups by period of detection: late summer and fall (August-October), winter (November-February), and the following spring (March-June). Combining 3 years of data,the mean proportions of fish detected during these three respective detection periods were 60.6, 27.7, and 11.7%. Mean probability estimates of survival from Valley Creek to Lower Granite or Little Goose Dams were 9.2, 23.4, and 40.8% for the respectivelate summer and fall, winter, and spring periods. Estimated overall mean probabilities of survival were 46.6% from tagging as parr to movement into the mouth of Valley Creek and 17.3% from Valley Creek to Lower Granite Dam. The overall mean parr-to-smolt survival estimate from tagging to arrival at Lower Granite Dam was 9.0%. The unexpectedly high proportion offish migrating in winter has important implications for fish monitoring studies that use rotary screw or scoop traps: these traps are generallyinoperable during winter near most natal rearing areas and thus may result in biased estimates of fish population status and migration timing. Advancements in technologies and methodologies to instream PIT-tag monitoring systems will improve data qualityto assist recovery planning for threatened and endangered fish species.
机译：被动集成转发器（PIT）标签技术的最新进展使得流中的鱼类监测系统的开发。我们在2002年夏天安装了两个在山谷小溪的两种这样的系统。在2002年夏天的夏天，2003 - 2005年的夏天，我们收集了野生春天/夏季Chinook三文鱼Parr Oncorhynchus Tshawytscha，在监视器上游的Natal饲养地区。虽然2003年秋季和2006年春季的后续检测号是低且可变的，但它们足以确定时间和估计存活。我们通过检测期限定义了迁徙组：夏季和秋季（八月至十月），冬季（11月至2月），以及以下春季（3月至6月）。结合3年的数据，这三个各个检测期间检测到的鱼的平均比例为60.6,27.7和11.7％。山谷河流或小鹅水坝的成本概率估计为9.2,23.4和40.8％，夏季，秋季，冬季和春季。估计生存的总体平均概率为46.6％，从标记为Parr，以进入山谷溪口，距离谷溪到下花岗岩大坝的17.3％。从标记到达较低的花岗岩坝的总体平均值估算估计为9.0％。在冬季迁移的意外高比例的迁移对鱼类监测研究的重要意义，这些研究使用旋转螺钉或勺子陷阱：这些陷阱在冬季在大多数基本饲养区域附近，因此可能导致鱼群地位和迁移时机的偏差估计。技术和方法的进步对仪器坑标签监测系统将提高数据质量，协助威胁和濒危鱼类的恢复规划。

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