| 基于水声学方法的东洞庭湖鱼类空间分布和资源量评估 |
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| 引用本文： | 谢意军,王珂,郭杰,刘绍平,陈大庆,段辛斌.基于水声学方法的东洞庭湖鱼类空间分布和资源量评估[J].淡水渔业,2016(3):40-46. |
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| 作者姓名： | 谢意军 王珂 郭杰 刘绍平 陈大庆 段辛斌 |
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| 作者单位： | 1. 农业部长江中上游渔业资源环境科学观测实验站，中国水产科学研究院长江水产研究所，武汉 430223; 华中农业大学水产学院，武汉 430070;2. 农业部长江中上游渔业资源环境科学观测实验站，中国水产科学研究院长江水产研究所，武汉 430223 |
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| 基金项目： | 荆江航道整治工程的透水框架作为人工鱼礁效果的研究、国家自然科学基金“长江中游四大家鱼产卵场定位及特征研究”(51579247)，农业部项目长江中上游重要渔业水域主要经济物种产卵场及洄游通道调查 |
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| 摘 要： | 2015年7月11—17日期间,通过使用回声探测仪(Simrad公司EY60型,200 k Hz换能器)对东洞庭湖的鱼类资源进行了探测评估。结果表明,调查航段的鱼类平均目标强度(目标鱼类对声波的反射能力)为(-51.24±5.66)d B,平均体长约为12 cm,体长范围为2~125.8 cm,不同区域间的鱼类目标强度(即鱼类大小)差异性显著。所有调查航段中鱼类密度1.223~1 534.2 f/1 000 m3之间,均密度为186.3 f/1 000 m3,不同区域间鱼类密度差异性显著,中部湖区(CEC航段)鱼类密度较高。应用资源密度体积法估算东洞庭湖鱼类资源量约为2.36×108f,其中目标强度在-43 d B(体长约28 cm)以下的鱼类占95.5%。
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| 关 键 词： | 水声学 东洞庭湖 鱼类 大小组成 空间分布 资源量 |
Fish spatial distribution and biomass assessment in East Dongting Lake using hydroacoustic method |
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| Abstract: | A SIMRAD EY60 echo-sounder with 200 kHz split-beam transducer was used to survey the fishery resources in East Dongting Lake during July 11—17, 2015. The results showed that the mean target strength ( acoustic reflectivity of target fish) in the surveying navigation section was ( -51. 24 ± 5. 26) dB and the mean length was about 12 cm, ranging from 2 to 125. 8 cm. The fish target strength in different areas was significantly different, which meant there was signifi-cant difference in fish size. The mean fish density was 186. 3 f/1 000m3 , ranging from 1. 223 f/1 000 m3 to 1 534. 2 f/1 000 m3 in all survey navigation sections, where a high fish density occurred in the middle area of East Dongting Lake( CEC navigation section) . The total amount of fish mantissa biomass were estimated at 2. 36 × 108 f, in which the fish with tar-get strength lower than-43 dB ( length about 28 cm) was 95. 5%. |
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| Keywords: | hydroacoustic East Dongting Lake fish size component spatial distribution biomass |
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