• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国政府科技报告 >Entrainment of Semi-Buoyant Beads and Razorback Sucker, Xyranuchen texanus, Larvae into Flood Plain Wetlands of the Middle Green River, Utah
【24h】

Entrainment of Semi-Buoyant Beads and Razorback Sucker, Xyranuchen texanus, Larvae into Flood Plain Wetlands of the Middle Green River, Utah

机译：将半浮力珠和Razorback吸盘，Xyranuchen texanus，幼虫夹入中绿河，犹他州的洪泛平原湿地

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

摘要

The razorback sucker, Xyrauchen texanus was formerly widespread throughout warmwater reaches of the Colorado River Basin, but is currently federally listed as endangered due to negative impacts from physical habitat alteration and introduction and proliferation of nonnative fishes. Flood plain wetlands are presumed important habitat for early life stages of razorback sucker. Therefore, the Upper Colorado River Basin Endangered Fish Recovery Program initiated actions to 1) identify key flood plain areas and breach levees to increase river connections to them and 2) develop and implement flow recommendations to enhance those connections. We released semi-buoyant beads and marked razorback sucker larvae into the Green River during spring run-off in 2004, 2005, and 2006 to evaluate drift characteristics of larvae and beads into flood plain wetlands. Based on drift rates and capture patterns, our findings from 2004 main channel only sampling suggested that beads and tetracycline-marked fish larvae were reasonable surrogates for one another based on similarities in drift capture patterns. We also captured substantial numbers of unmarked, wild-produced razorback sucker larvae in 2004. This demonstrated that stocked adult fish were successfully reproducing and that another spawning area may exist downstream from Razorback Bar (now named Escalante Bar), an hypothesis later verified by independent sampling of ripe adult fish. Based on 2004 and 2005 captures of two different colored beads released on different sides of the river, complete cross-channel mixing of drift particles did not occur until at least 22 kilometers (km) downstream of release sites over the range of flows we tested. Mixing is likely to occur more quickly at higher flows.

著录项

相似文献

  • 外文文献
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