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Position: Home > Articles > Spatial and Temporal Distribution of Larval Rusources of Fishes in Xijiang River Freshwater Fisheries 2007,37 (4) 37-40

西江肇庆江段鱼类早期资源时空分布特征研究

作  者:
谭细畅;李新辉;陶江平;李捷;王超;罗建仁;赖子尼
单  位:
中国水产科学研究院珠江水产研究所;中国科学院水生生物研究所
关键词:
西江;鱼类早期资源;时空分布
摘  要:
2006年5~7月对西江肇庆江段鱼苗的时空分布进行了研究,结果表明:5月17日及6月1日前后该江段有苗汛发生,鱼苗密度平均值为0.83尾/m3,最大值为7.9尾/m3;鱼苗密度昼夜分布有显著性差异(n=26,P<0.01),夜间的密度比白天的高;鱼苗的种类在昼夜分布上也有明显差异,四大家鱼鱼苗的分布主要集中于夜间;鱼苗的分布具空间差异性,近岸的鱼苗密度高于江中央的。
译  名:
Spatial and Temporal Distribution of Larval Rusources of Fishes in Xijiang River
作  者:
TAN Xi-chang1,LI Xin-hui1,TAO Jiang-pin2,LI Jie1,WANG Chao1,LUO Jian-ren1,LAI Zi-ni1 (1.Pearl River Fisheries Research Institute,Chinese Academy of Fishery Sciences,Guangzhou 510380 2.Institute of Hydrobiology,Chinese Academy of Sciences,Wuhan 430072)
关键词:
Xijiang River;larval rusources of fishes;spatial and temporal distribution
摘  要:
Based on the survey of fish fry in Xijiang River from May to July in 2006,Spatial and temporal distribution of fish fry was studied.The results showed that:in 17 May and 1 June the density of fish fry reached the highest level,with the average density of 0.83 ind./m3,max density 7.9 ind./m3;variation of fry abundance between night and day at surface was very conspicuous(n=26,P<0.01),the density in night was higher than the density in day;variation of abundance was also obvious for different species fry,four famous freshwater fishes(grass carp,black carp,silver carp and big head)were mainly sampled at night;variation of spatial distribution was observed,and the density of fish fry near shore was higher than the density in mid-river.

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