• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>North Pacific Anadromous Fish Commission bulletin >Forage Base of Pacific Salmon in the Western Bering Sea and Adjacent Pacific Waters in 2002-2006
【24h】

Forage Base of Pacific Salmon in the Western Bering Sea and Adjacent Pacific Waters in 2002-2006

机译：2002-2006年在白令海西部和太平洋邻近海域的太平洋鲑鱼的觅食基地

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

The objective of this study was to estimate the total relative biomass of the forage base (zooplankton + nekton) of Pacific salmon (Oncorhynchus spp.) in the upper epipelagic zone of the western Bering Sea and adjacent Pacific waters in summer and fall 2002-2006. Zooplankton biomass was estimated from plankton survey data, and nekton biomass was estimated from salmon diet data using a mathematical model of selective feeding. In 2002-2006, estimated total relative biomass of the salmon forage base varied from 690-1590 mg/m3. Biomass was lowest in fall 2004, and was highest in fall 2002. Copepods and chaetognaths dominated the potential forage base. Squids and fishes were 15-22% (average 19%) of the overall biomass. The biomass of fish was highest in the continental shelf area (Anadyr Bay). Squids were more abundant in deep-water regions of the Bering Sea and adjacent Pacific waters. Walleye pollock Theragra chalcogramma, capelin Mallotus villosus, and Pacific sand lance Ammodytes hexapterus were the dominant nekton species in the northwestern shelf region. Shortarm gonate squid Gonatus kamtschaticus, boreopacific gonate squid Gonatopsis borealis, Atka mackerel Pleurogram-mus monopterygius, and myctophids were prevalent items in the salmon forage base in deep-water areas. In general, the results indicated that immature salmon in both summer and fall were concentrated within deep-water regions of the western Bering Sea, where their forage (overall and preferred prey items) was also concentrated, and were much less numerous in the Pacific waters off the Commander Islands and in the western Bering Sea shelf zone, where their forage was less concentrated.
机译：这项研究的目的是估计2002-2006年夏季和秋季秋季白令海西部上表层带和邻近太平洋水域中太平洋鲑（Oncorhynchus spp。）的饲草基础（zoplankton + nekton）的总相对生物量。 。浮游生物的生物量是根据浮游生物调查数据估计的，而浮游生物的生物量是根据鲑鱼饮食数据使用选择性喂养的数学模型估算的。在2002-2006年，鲑鱼饲草基料的估计总相对生物量为690-1590 mg / m3。生物量在2004年秋季最低，而在2002年秋季最高。pe足类和cha足类动物占据了潜在的饲料基础。鱿鱼和鱼类占总生物量的15-22％（平均19％）。鱼的生物量在大陆架地区（Anadyr湾）最高。在白令海和邻近太平洋水域的深水区，鱿鱼更加丰富。角膜白鲸Theragra chalcogramma，毛鳞鱼Mallotus villosus和太平洋沙枪Ammodytes hexapterus是西北大陆架地区的主要nekton物种。在深水区鲑鱼饲草基地中，短臂鹅科鱿鱼Gonatus kamtschaticus，北太平洋鹅科鱿鱼Gonatopsis tubealis，Atka鲭鱼侧柏肉蝇和Myctophidus是常见的物品。总体而言，结果表明，夏季和秋季未成熟的鲑鱼都集中在白令海西部的深水区域，那里的草料（全部和偏爱的猎物）也集中了，在太平洋水域的数量少得多在指挥官群岛附近和白令海西部架子地区，那里的牧草集中程度较低。

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