• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国政府科技报告 >Results of the 2012 Eastern Bering Sea Upper Continental Slope Survey of Groundfishes and Invertebrate Resources.
【24h】

Results of the 2012 Eastern Bering Sea Upper Continental Slope Survey of Groundfishes and Invertebrate Resources.

机译：2012年东部白令海上陆陆坡地面鱼类和无脊椎动物资源调查结果。

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

摘要

The results of the 2012 Alaska Fisheries Science Centers (AFSC) bottom trawl survey of the groundfish and invertebrate resources of the eastern Bering Sea upper continental slope (EBSS) are presented. The 2012 EBSS survey is the fifth standardized biennial groundfish bottom trawl survey of this region. One-hundred eighty-nine successful survey bottom trawls were conducted from 200 to 1,200 m depth on the eastern Bering Sea slope. The survey area extended from Unalaska and Akutan Island in Alaska (54DG N) to the U.S-Russian maritime boundary at 61DG N. Sampling was stratified by six subareas running south to north and by five depth strata within each subarea. Stations were chosen randomly and target sampling density was proportional to the area (km2) in each subarea and depth stratum. Mean sampling density was approximately one tow per 172 km2. This report provides estimates of biomass in metric tons (t), population number, and catch per unit effort (CPUE; no./ha and kg/ha) for all taxa identified on the survey. Size frequencies (42 species) and CPUE distribution plots (41 species) are presented for the most abundant species or species of commercial interest. The five fish species with the greatest survey biomass were giant grenadier (Albatrossia pectoralis), Pacific ocean perch (Sebastes alutus), arrowtooth flounder (Atheresthes stomias), popeye grenadier (Coryphaenoides cinereus), and walleye pollock (Theragra chalcogramma).

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