红水河岩滩水库鱼类资源声学评估
为评估梯级开发下渔业资源变化情况,2015年9月采用分裂波束鱼探仪EY60(120 kHz,250 W)对红水河岩滩水库库区及上游江段鱼类资源进行声学调查,并结合渔获物统计和地理统计分析对鱼类时空分布进行分析,评估鱼类资源量。结果显示整个调查区域的鱼类资源密度为(0.53±2.11)尾·m^(-2)(±SD),从水坝上游至库区呈增长趋势,鱼类资源密度水平分布与水深无显著相关关系。垂直分布方面,鱼类主要分布在30 m以内水层;不同大小个体对水深有一定的选择性,小个体鱼类(30 cm)有44.7%分布在40 m以下水层。基于鱼类分布GIS建模,估算调查区域鱼类资源量为6.57×10^7尾。...
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Published in | 南方水产科学 Vol. 13; no. 3; pp. 20 - 25 |
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Main Author | |
Format | Journal Article |
Language | Chinese |
Published |
中国水产科学研究院珠江水产研究所,广东 广州,510380
2017
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Subjects | |
Online Access | Get full text |
ISSN | 2095-0780 |
DOI | 10.3969/j.issn.2095-0780.2017.03.003 |
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Summary: | 为评估梯级开发下渔业资源变化情况,2015年9月采用分裂波束鱼探仪EY60(120 kHz,250 W)对红水河岩滩水库库区及上游江段鱼类资源进行声学调查,并结合渔获物统计和地理统计分析对鱼类时空分布进行分析,评估鱼类资源量。结果显示整个调查区域的鱼类资源密度为(0.53±2.11)尾·m^(-2)(±SD),从水坝上游至库区呈增长趋势,鱼类资源密度水平分布与水深无显著相关关系。垂直分布方面,鱼类主要分布在30 m以内水层;不同大小个体对水深有一定的选择性,小个体鱼类(30 cm)有44.7%分布在40 m以下水层。基于鱼类分布GIS建模,估算调查区域鱼类资源量为6.57×10^7尾。 |
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Bibliography: | fish resources ; acoustic assessment ; spatiotemporal distribution ; Yantan Resevoir in the Red River WU Zhi, LI Xinhui, LI Jie, CHEN Fangcan, ZHU Shuli (Pearl River Fisheries Research Institute, Chinese Academy of Fishery Science, Guangzhou 510380, China) 44-1683/S To assess the variation of fish resources caused by cascade development, we used a split-beam echosounder (120 kHz, 250 W) with catch statistics and a geographic analysis to investigate the spatiotemporal variation and to estimate the existing resource a- bundance in Yantan Reservoir in the Red River in September, 2015. The average fish resources density was (0. 53 ± 2. 11 ) ind·m-2 with an increasing trend from upper to the Reservoir. The density distribution of fish resources had no significant correlation with water depth. The fish mainly distributed at 0 -20 m layer. For water depth, individuals at different sizes had definite selectivity (86. 2% ) : small fish ( 〈 10 era) distributed within the 30 m layer and about 44. 7% large fish ( 〉 30 era) |
ISSN: | 2095-0780 |
DOI: | 10.3969/j.issn.2095-0780.2017.03.003 |