黄河小浪底水库主河道水域渔业资源声学评估

发布时间：2018-06-22 17:27

本文选题：渔业资源 + 声学调查　；参考：《水产学报》2015年08期

【摘要】：2013年11月25日和2014年5月22日,使用分裂式波束科学鱼探仪(Simrad EY60,70k Hz,挪威)对黄河小浪底水库库尾大坝至黄河三峡段主河道的渔业资源进行了2次声学调查。通过对鱼类目标强度的现场测量,使用回波积分方法对库区内不同区域鱼类资源平均密度、资源量和空间分布进行了探查和评估。结果表明,2013年11月和2014年5月库区内调查水域声学积分值(nautical area scattering coefficient,NASC)分别为29.38 m2/nm2和49.77 m2/nm2,对应的鱼类资源平均密度分别为0.016尾/m2和0.290尾/m2,资源量分别为41.56 t和606.70 t。库区调查区域鱼类密度的空间水平分布,在大坝附近、主河道中游、上游以及黄河三峡2013年11月分别为0.016、0.023、0.024和0.009尾/m2,2014年5月分别为0.848、0.248、0.077和0.083尾/m2。2013年11月鱼类资源主要集中于主河道中上游水域,而2014年5月则主要集中于主河道中下游水域。鱼类的垂直分布显示了层状分布特征,黄河三峡段鱼类主要分布于10~20 m水层,其他主河道区域则主要分布在表层以及20~30 m水层。2013年11月和2014年5月鱼类目标强度分别以-59.5 d B和-56.5~-53.5 d B所占比例最高,体长较小且经过半年体长有所增加。研究表明,声学方法适用于黄河小浪底水库渔业资源调查。
[Abstract]:On November 25, 2013, and May 22, 2014, a split beam scientific fish detector (Simrad EY600 70k Hz, Norway) was used to conduct two acoustic surveys on fishery resources in the main channel from the tail dam of Xiaolangdi Reservoir in the Yellow River to the three Gorges section of the Yellow River. The average density, resource quantity and spatial distribution of fish resources in different areas of the reservoir area were explored and evaluated by using echo integral method through the field measurement of fish target intensity. The results showed that in November 2013 and May 2014, the acoustical integral value (nautical area scattering) of investigated waters was 29.38 m2/nm2 and 49.77 m2 / nm-2, respectively. The average densities of fish resources were 0.016 / m2 and 0.290 / m2, respectively, and the resource volumes were 41.56t and 606.70 t, respectively. The spatial horizontal distribution of fish density in the reservoir area, near the dam, in the middle reaches of the main river, In November 2013, the upstream and the three Gorges of the Yellow River were 0.016, 0.023, 0.024 and 0.009 / m2, respectively. In May, 2014, the fish stocks were 0.848, 0.248, 0.077 and 0.083, respectively. In November 2013, fish stocks were mainly concentrated in the middle and upper reaches of the main channel, and in May 2014, they were mainly concentrated in the middle and lower reaches of the main river. The vertical distribution of fish shows the characteristics of stratified distribution. The fish in the three Gorges section of the Yellow River are mainly distributed in 1020 m water layer. In November 2013 and May 2014, the fish target intensity was the highest in the proportion of -59.5 dB and -56.5 ~ 53.5 dB, the body length was smaller and the body length increased after half a year. The results show that the acoustic method is suitable for the investigation of fishery resources in Xiaolangdi Reservoir of the Yellow River.
【作者单位】：大连海洋大学海洋科技与环境学院;河南省水产科学研究院;
【基金】：公益性行业(农业)科研专项(201303050) 国家自然科学基金(10774021)
【分类号】：S931.1

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