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青皮塘产卵场广东鲂繁殖群体的水声学探测
Authors
李捷
李新辉
+5 more
王超
罗建仁
谭细畅
赖子尼
陶江平
Publication date
1 January 2008
Publisher
Abstract
2006年4—5月利用Simrad EY60型分束回声探测仪对青皮塘广东鲂产卵场的繁殖群体进行定点横向探测及航行垂直探测。在人工标定及同步渔获物统计的基础上,对广东鲂的回声信号进行了判别。结果表明:广东鲂在青皮塘产卵场有明显的聚集、逗留行为,其游动速度(均值0.24m·s-1)低于其他鱼类(均值0.49m·s-1);广东鲂繁殖个体目标强度的范围为-33.8~-52.3dB,均值为-42.2dB;4月27日—5月1日,广东鲂在青皮塘的聚群过程约经历了4d;初步估算5月1日青皮塘产卵场广东鲂繁殖群体数量为9
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Institute of Hydrobiology, Chinese Academy Of Sciences
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Last time updated on 15/03/2018