| EY60回声探测仪在青海湖鱼类资源量评估中的应用 |
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| 引用本文： | 谭细畅,史建全,张宏,陶江平,杨建新,祁洪芳,李新辉.EY60回声探测仪在青海湖鱼类资源量评估中的应用[J].湖泊科学,2009,21(6):865-872. |
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| 作者姓名： | 谭细畅 史建全 张宏 陶江平 杨建新 祁洪芳 李新辉 |
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| 作者单位： | 谭细畅,李新辉(中国水产科学研究院珠江水产研究所,广州,510380);史建全,张宏,杨建新,祁洪芳(青海湖裸鲤救护中心,西宁,810016);陶江平(水利部、中国科学院水工程生态研究所,武汉,430079) |
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| 基金项目： | 青海省科技厅"青海湖裸鲤淡水全人工养殖"项目资助 |
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| 摘 要： | 2006年8月16-18日通过使用回声探测仪(Simrad公司EY60型,200kHz换能器)对青海湖的鱼类资源进行了探测评估.结果表明:青海湖裸鲤(Gymnocypris przewalski)水平分布具不均匀性,有小型鱼群聚集现象;在不同的设定分区,鱼类密度在0.168-12.8ind./1000m~3之间,均值为1.16 ind./1000m~3;布哈河口鱼类较为密集,密度最大值为12.8ind./1000m~3.初步估算青海湖裸鲤达可捕规格(体长大于20cm)个体数量为6.5×10~7ind.,95%置信度区间为35.6×10~7-118.4×10~7ind.,应用资源密度体积法估算青海湖裸鲤的可捕资源量约为1 5275t.探测实验还证实,EY60回声探测仪在青海湖中进行鱼类资源评估时探测效果良好,分析软件Sonar5可以对鱼类个体自动识别、计数,便于进行鱼类资源量评估.
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| 关 键 词： | 青海湖 回声探测 鱼类资源量 评估 |
| 收稿时间： | 2009/2/10 0:00:00 |
| 修稿时间： | 2009/4/22 0:00:00 |
Hydroacoustic assessment of fish resources in the Lake Qinghai with EY60 echosounder |
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| TAN Xichang,SHI Jianquan,ZHANG Hong,TAO Jiangping,YANG Jianxin,QI Hongfang and LI Xinhui.Hydroacoustic assessment of fish resources in the Lake Qinghai with EY60 echosounder[J].Journal of Lake Science,2009,21(6):865-872. |
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| Authors: | TAN Xichang SHI Jianquan ZHANG Hong TAO Jiangping YANG Jianxin QI Hongfang and LI Xinhui |
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| Institution: | TAN Xichang1,SHI Jianquan2,ZHANG Hong2,TAO Jiangping3,YANG Jianxin2,QI Hongfang2 & LI Xinhui1 (1: Pearl River Fishery Research Institute,Chinese Academic of Fishery Science,Guangzhou 510380,P.R.China) (2: Qinghai Naked Carp Rescue Center,Xining 810016,P.R.China) (3: Institute of Hydroecology,Ministry of Water Resources & Chinese Academy of Sciences,Wuhan 430079,P.R.China) |
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| Abstract: | A SlMRAD EY60 echo-sounder with 200kHz split-beam transducer was used to survey the fish school in Lake Qinghai on August 16-18, 2006. The transducer was tied on the side of the ship downward at one meter depth. The cruising speed is 8-10km/h. Also, a GPS was connected with EY60 echo-sounder for obtaining the survey position data. The pulse duration was set at 64μs. At post-processing, the Sonar5-pro software (versions 5.9.6) was used to analyze the echo-sounder data. The results show that the Gymnacypris przewalskii is not uniform distribution in horizontal direction in Lake Qinghai, and appears the feature of small aggregation. For different survey subarea, the density of fish is 0.168-12.S ind./1000m~3, and the average is 1.16ind./1000m~3 where the maximum appeared near the Buha estuary. The biomass of catchable size is estimated at 6.5×10~7 ind. near 15275 ton, at 35.6×10~7-118.4×10~7 ind. with 95% confidence interval. Our results also indicated that the EY60 echo-sounder is suitably applicable in Lake Qinghai to estimate the fish productions effectively. |
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| Keywords: | EY60 Lake Qinghai hydroacoustic fish resources assessment EY60 |
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