长江天鹅洲故道鱼类群落结构特征及其年际变化
INTERANNUAL VARIATION OF THE FISH COMMUNITY STRUCTURE IN TIAN-E-ZHOU OXBOW OF THE YANGTZE RIVER
投稿时间:2017-05-10  修订日期:2017-11-16
中文关键词:天鹅洲  鱼类群落结构  小型鱼类资源
英文关键词:Tian-e-zhou Oxbow  fish community structure  small-sized fish resource  
基金项目:湖北长江天鹅洲白鱀豚国家级自然保护区管理处委托项目和WWF项目资助
作者单位E-mail
龚江 华中农业大学水产学院 gjiang2495@163.com 
王腾 华中农业大学水产学院 843854193@qq.com 
李霄 华中农业大学水产学院 843854193@qq.com 
黄丹 华中农业大学水产学院 greendesert@126.com 
沈建忠 华中农业大学水产学院 jzhsh@mail.hzau.edu.cn 
龚成 湖北长江天鹅洲白鱀豚国家级自然保护区管理处 843854193@qq.com 
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中文摘要:
      根据2010-2011年和2015-2016年两个时间段对长江天鹅洲故道鱼类资源的调查,分析了长江天鹅洲故道鱼类种类组成、优势种和物种多样性的变化,着重了解长江江豚潜在饵料鱼资源----小型鱼类的情况。两次调查共采集到鱼类51种,隶属于6目12科41属,其中2010-2011年采集鱼类50种,2015-2016年采集鱼类38种。小型鱼类共采集到32种,其中2010-2011年度为31种,2015-2016年度为22种,减少的种类主要为长江干流繁殖进入天鹅洲故道的种类。2015-2016年相比2010-2011年度小型鱼类优势种也发生了较大的改变,2010-2011年故道小型鱼类优势种5种,按依优势度排序为:短颌鲚、贝氏?、鲫、似鳊和银鮈;而2015-2016年优势种为4种,按优势度排序为:黄尾鲴、?、短颌鲚和鲫,来自长江干流繁殖的小型鱼类资源有所减少。建议通过灌江纳苗引入似鳊、银鮈、贝氏?等长江干流繁殖的小型鱼类,以及改善生境为?、鲫等湖泊定居鱼类提供良好的繁殖环境,以增加长江江豚饵料鱼类的资源量,满足长江江豚的食物需求。
英文摘要:
      The fishery resource survey was carried out in Tian-e-zhou Oxbow of the Yangtze River during 2010-2011 and 2015-2016 in order to understand the variations in species composition, dominant species and diversity of fish, particularly the forage fishes of Yangtze finless porpoise (Neophocaena asiaeorientalis asiaeorientalis). A total of 51 fish species including 50 fish species during 2010-2011 and 38 fish species during 2015-2016 were collected representing 6 orders, 12 families, and 41 genera. A total of 32 species of small-sized fishes sampled with 31 and 22 species in 2010-2011 and 2015-2016, respectively. The undetected small-sized fishes in 2015-2016 mainly came from the mainstream of the Yangtze River. The dominant small-sized fish species remarkably changed from 2010-2011 to 2015-2016. Coilia brachygnathus, Hemiculter bleekeri, Carassius auratus, Pseudobrama simoni and Squalidus argentatus were dominated during 2010-2011, while Xenocypris davidi , Hemiculter leucisculus , Coilia brachygnathus and Carassius auratus were dominated during 2015-2016. To increase the small-sized fish resources and ensure finless porpoise have enough forage fish,we propose adopting fries reproduced in mainstream of Yangtze River, such as Pseudobrama simony, Squalidus argentatus and Hemiculter bleekeri, by filling with river flows and improving habitats to provide better and more spawning grounds for the lake resident fishes, such as Carassius auratus and Hemiculter leucisculus.
龚江,王腾,李霄,黄丹,沈建忠,龚成.2018.长江天鹅洲故道鱼类群落结构特征及其年际变化[J].水生态学杂志,39(4):46-53.
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