摘要
2017年7月-2018年6月,对湘江下游汨罗江段的仔鱼及幼鱼、成鱼开展了逐月调查,采集仔鱼1 559尾,隶属于4科12种,其中江湖洄游型鱼类7种,468尾,分别占总量的58.3%和30.0%;采集幼鱼、成鱼1 258尾,隶属于8科42种,其中江湖洄游性鱼类16种,547尾,11 486.8g,分别占总量的38.1%、43.6%和40.7%。分析结果表明,仔鱼及幼鱼、成鱼的丰度呈现明显的季节性变化特征,均为夏季高,冬季低;4-8月份,江湖洄游型鱼类的运动指数在0.1～0.7之间,呈现入湖趋势;10月份至次年3月份,江湖洄游型鱼类的运动指数在-0.7～-0.3之间,呈现出湖趋势;幼鱼、成鱼的丰度基本上夜间高于白天的;径流量和水温是鱼类出、入湖的主要驱动因子。
The monthly surveys were conducted for larvae, juvenile and adult fishes in the Miluo reaches of the Xiang River from May 2017 to June 2018. A total of 1 559 larvae fishes were collected, belonging to 12 species and 4 families, of which the river-lake migratory fishes accounted for 58.3% for 7 species and 30.0% for 468 species. Also 1 258 juvenile and adult fishes were collected, belonging to 42 species and 5 orders, the river-lake migratory fishes accounted for 38.1% for 16 species, 43.6% for 547 individuals and 40.7% for 11 486.8g. The results showed that the abundance of larvae, juvenile and adult fishes showed strongly seasonal variation, both high in summer and low in winter. From April to August, the movement index of the river-lake migratory fishes was between 0.1 and 0.7, showing a tendency of entering the lake. From October to March, the movement index was between -0.7 and -0.3, showing a tendency of entering the river. The results also showed that juvenile and adult fish migrated mainly at night. Runoff volume and water temperature were the main driving factors of fish.
作者
刘艳佳
高雷
郑永华
段辛斌
刘绍平
陈大庆
刘寒文
LIU Yan-jia;GAO Lei;ZHENG Yong-hua;DUAN Xin-bin;LIU Shao-ping;CHEN Da-qing;LIU Han-wen(College of Animal and Technology,Southwest University,Chongqing 400715,China;Yangtze River Fisheries Research Institute of Chinese Academy of Fishery Science,Wuhan 430223,China)
出处
《淡水渔业》
CSCD
北大核心
2019年第2期51-58,共8页
Freshwater Fisheries
基金
国家自然科学基金(31602161
51579247)
农业部项目"长江中上游重要渔业水域主要经济物种产卵场及洄游通道调查"
关键词
鱼类资源
季节变化
洄游
环境因子
汨罗江段
fish resource
seasonal variation
migration
environmental factors
Miluo section
