| 基于声学测量方法的大伙房水库鱼类资源季节变动特征 |
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| 引用本文： | 张赞,蔺丹清,汤勇,孙建富,李九奇.基于声学测量方法的大伙房水库鱼类资源季节变动特征[J].南方水产,2014(6):12-19. |
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| 作者姓名： | 张赞 蔺丹清 汤勇 孙建富 李九奇 |
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| 作者单位： | 大连海洋大学海洋科技与环境学院,辽宁 大连,116023 |
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| 基金项目： | 农业部948专项“海洋牧场关键技术引进与创新” |
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| 摘 要： | 2012年7月19～21日,9月14～16日及2013年5月12～14日,使用分裂波束科学鱼探仪（70 kHz）对辽宁省大伙房水库进行了鱼类资源声学调查,并选择上、中、下游站位进行了水文参数调查。分析库区内鱼类密度分布的季节变动,评估渔业资源现存量。结合水文参数讨论了鱼类垂直空间分布的季节变动。结果表明,春季鱼类主要在0～10m、夏季在5～15m、秋季在10～20m水层分布。不同季节的水平分布,春季鱼类呈小集群在库区均匀分布;夏季主要集中在上、中游;秋季主要集中在下游分布。库区水温和溶解氧（DO）随季节变化较大,鱼类分布受水温影响较大,主要在温跃层以浅水层分布。秋季库区水文条件相对其他季节稳定,无明显温跃层,鱼类回波成垂直分散状态,更适合声学调查和资源评估。9月库区资源现存量约为1 522t。
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| 关 键 词： | 淡水声学调查 水库资源评估 季节变动 鱼类密度 |
Seasonal variability of fishery resources in Dahuofang Reservoir based on acoustic survey method |
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| ZHANG Zan,LIN Danqing,TANG Yong,SUN Jianfu,LI Jiuqi.Seasonal variability of fishery resources in Dahuofang Reservoir based on acoustic survey method[J].South China Fisheries Science,2014(6):12-19. |
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| Authors: | ZHANG Zan LIN Danqing TANG Yong SUN Jianfu LI Jiuqi |
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| Institution: | (School of Marine Sci-Tech and Environment, Dalian Ocean University, Dalian 116023, Chinia ) |
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| Abstract: | With a split-beam scientific echosounder（ Simrad,EY60,70 kHz）,we investigated the fishery resources in the Dahuofang Reservoir in Liaoning Province on July 19 ～ 21,September 14 ～ 16,2012 and May 12 ～ 14,2013. The main hydrogeological parameters were surveyed in various stations distributed in the upper,middle and lower reaches. Moreover,the seasonal variation of fish density and distribution were analyzed to estimate the existing resource abundance in the reservoir,and the seasonal variability of vertically fish distribution was discussed with consideration to hydrological parameters. Results show that the fish mainly distributed at depth of 0 ～ 10m in the spring,5 ～ 15m in summer,and 10 ～ 20m in autumn,respectively. The horizontal fish distribution was uniform as small clusters in spring,assembled in upper and middle reaches as separating individuals in summer and moved to lower reaches in autumn. The seasonal changes in water temperature and dissolved oxygen were obvious,and the fish distribution,which was mainly in the layer above the thermocline,was influenced by water temperature. The hydrogeological parameters were relative stable in autumn compared with the other seasons. There wasn＇t a thermocline in the reservoir and the fish echo was almost at single target echo state,which was suitable for acoustic survey and fishery resource assessment. The abundance of reservoir was estimated as 1 522 t in September. |
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| Keywords: | acoustic survey in freshwater resource assessment in reservoir seasonal variability density of fish |
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