• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Russian journal of marine biology >The Importance of Fish Species in Bottom and Near-Bottom Biotopes of the Far Eastern Seas and Pacific Waters of Russia
【24h】

The Importance of Fish Species in Bottom and Near-Bottom Biotopes of the Far Eastern Seas and Pacific Waters of Russia

机译：The Importance of Fish Species in Bottom and Near-Bottom Biotopes of the Far Eastern Seas and Pacific Waters of Russia

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相关主题

摘要

Abstract The importance of fish species in ichthyocenes of the benthic zone (up to a depth of 2000 m) in the Russian part of the Far Eastern seas and adjacent waters of the Northwest Pacific is discussed for the first time. The study is based on the data of bottom trawl surveys conducted by the Pacific Research Institute of Fisheries and Oceanography (TINRO) in 1977–2010. The inverse Simpson’s index (or polydominance index) is selected as a measure of dominance; the S?rensen–Czekanowski similarity index is used for comparative analysis of the dominance structure in ichthyocenes of the regions. The analysis of the importance of species in the ichthyocene species structure is carried out for the top 20 species ranked by biomass. These species constitute a substantial portion of the biomass of all demersal fishes in all the regions: an average of 94.9% for the shelf and 95.8% for the continental slope. A conclusion is made that the ichthyocenes of bottom and near-bottom biotopes (0–2000 m) in Russian waters of the Far Eastern Seas are represented by communities with poor evenness in species abundance and a pronounced dominance of two to four species. The importance of species in the ichthyocene structure is as follows: walleye pollock (Theragra chalcogramma) dominates all the regions; the subdominants are Pacific herring (Clupea pallasii), Pacific cod (Gadus macrocephalus), Atka mackerel (Pleurogrammus monopterygius), and Okhotsk atka mackerel (P. azonus), depending on the region. The ubiquitous dominance of walleye pollock is broken on the continental slope of the Bering Sea dominated by the giant grenadier (Albatrossia pectoralis); the group of subdominants on the continental slope of all regions is comprised of Greenland halibut (Reinhardtius hippoglossoides matsuurae), popeye grenadier (Coryphaenoides cinereus), Pacific herring, Pacific sleeper shark (Somniosus pacificus), scale-eye plaice (Acanthopsetta nadeshnyi), and blackfin founder (Glyptocephalus stelleri). The graphs of similarity between the study regions (Sea of Okhotsk, Bering Sea, Sea of Japan, and Pacific waters off Kamchatka and the Kuril Islands) in species composition and dominant species structure of ichthyocenes are composed separately for the shelf and continental slope using summarized data.

著录项

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