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三峡水库典型库湾生态渔业综合效益评估--以重庆市忠县甘井河水域牧场为例
Authors
何文平
叶少文
+4 more
梁磊
蒋礼
贺蓉
郑曙明
Publication date
1 January 2015
Publisher
Abstract
以三峡库区忠县甘井河水域牧场示范区为例,在水域牧场内、外设置采样点,调查水质、浮游生物及土著鱼类组成现状,同时监测水域牧场内放养鲢(Hypophthalmichthys molitrix)、鳙(Aristichthys nobilis)的起捕规格及生长情况,旨在评估三峡水库典型库湾生态渔业的综合效益。忠县甘井河水域牧场水域面积为0.08 km2,按“零投喂”的放养模式经营,放养的鲢、鳙起捕规格分别为(2436±486)和(2769±496)g,年龄均为3—4龄。生态效益方面,水域牧场内、外调查到的土著鱼类数量均为10种,优势种均为贝氏Hemiculter bleekeri和似鳊Pseudobrama simoni。在6月、9月和12月,水域牧场内总氮(TN)、总磷(TP)比水域牧场外低或相近,水域牧场内溶氧(DO)比水域牧场外高或相近;在3月、9月和12月,水域牧场内、外水质总体无差异;而在鱼类生长旺季的6月份,水域牧场内的水质优于水域牧场外,说明生态渔业在一定程度上改善了水质。经济效益方面,甘井河水域牧场年均效益202.6万元;社会效益方面,共转产渔民111人,提供就业岗位45个,人均年收入36610元
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Institute of Hydrobiology, Chinese Academy Of Sciences
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oai:ir.ihb.ac.cn:342005/34753
Last time updated on 31/01/2020