鄱阳湖通江水道鱼类空间分布特征及资源量评估

发布时间：2017-12-27 12:18

本文关键词：鄱阳湖通江水道鱼类空间分布特征及资源量评估　出处：《湖泊科学》2017年04期 　论文类型：期刊论文

【摘要】：于2014年9月24至26日在鄱阳湖通江水道湖口至屏峰段使用SIMRAD EY60回声探测仪对鱼类资源进行水声学调查.结果显示,鄱阳湖通江水道鱼类目标强度平均值为-56.4±6.4 d B,范围为-69.9~-32.1 d B;估算的平均全长为7.6 cm,范围为1.2~98.0 cm;鱼类资源的平均密度为53.7 ind./1000 m3,范围为0~441.7 ind./1000 m3.在水平分布上,鱼类主要分布在湖口县、鞋山和屏峰附近3个水域.区域Ⅰ和区域Ⅲ的鱼类密度显著高于区域Ⅱ的鱼类密度;区域Ⅲ的鱼类个体大小显著小于区域Ⅰ和区域Ⅱ.在垂直分布上,多数鱼类栖息于主河槽的深水区,且大个体更倾向于深水区.在此基础上,利用Arc GIS地统计插值方法估算鄱阳湖通江水道湖口至屏峰山水域鱼类总数量约为6.2×107ind.,总生物量约620 t.结果表明,鄱阳湖通江水道是鱼类重要的栖息地,建议加强该水域的保护,保持鄱阳湖与长江的自然连通.
[Abstract]:The fish resources of hydroacoustic survey in September 2014 24 to 26 in Poyang Lake Tongjiang Hukou waterway to screen peak period using SIMRAD EY60 echo detector. Results show that the Poyang Lake Tongjiang river fish target strength average value was -56.4 + 6.4 D B, D B is in the range of -69.9~-32.1; the average length of the estimated 7.6 cm, range of 1.2~98.0 cm the average density of fish resources; 53.7 ind./1000 m3, 0~441.7 ind./1000 m3. in the range of horizontal distribution, fish are mainly distributed in Hukou County, Xie Shan and screen peak near 3 waters. Area I and III regional fish density was significantly higher than that of region II III fish density; regional fish size is significantly smaller than the area I and region II. In the vertical distribution, the majority of fish habitat in the main channel of the deepwater area, and they are more inclined to the deepwater area. On this basis, using the statistical interpolation method for estimation of Poyang Arc GIS The total number of fish in Hukou to Feng Feng mountain area of Lake Tongjiang waterway is about 6.2 x 107ind., and its total biomass is about 620 t.. The results show that Poyang Lake Tongjiang waterway is an important habitat for fish. It is suggested to strengthen the protection of the waters and maintain the natural connectivity between Poyang Lake and the Yangtze River.
【作者单位】：江西省水产科学研究所;中国科学院水生生物研究所;中国科学院水生生物多样性与保护重点实验室;
【基金】：江西省科技重大专项(20114ABG01100-1-02-2)资助
【分类号】：S931
【正文快照】： (3:中国科学院水生生物多样性与保护重点实验室,武汉430072)***江西省科技重大专项(20114ABG01100-1-02-2)资助.2016-06-22收稿;2016-10-26收修改稿.陈文静(1965~),女,研究员;E-mail:418215117@qq.com.tive ecosystem management of the floodplain biodiversity.鄱阳湖是我国

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