| 西江肇庆江段鱼类早期资源时空分布特征研究 |
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| 引用本文： | 谭细畅,李新辉,陶江平,李捷,王超,罗建仁,赖子尼.西江肇庆江段鱼类早期资源时空分布特征研究[J].淡水渔业,2007,37(4):37-40. |
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| 作者姓名： | 谭细畅 李新辉 陶江平 李捷 王超 罗建仁 赖子尼 |
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| 作者单位： | 1. 中国水产科学研究院珠江水产研究所,广州,510380
2. 中国科学院水生生物研究所,武汉,430072 |
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| 基金项目： | 广东省科研计划项目，广东省自然科学基金 |
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| 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。
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| 关 键 词： | 西江 鱼类早期资源 时空分布 |
| 文章编号： | 1000-6907-（2007）04-0037-04 |
| 修稿时间： | 2006-11-19 |
Spatial and Temporal Distribution of Larval Rusources of Fishes in Xijiang River |
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| TAN Xi-chang,LI Xin-hui,TAO Jiang-pin,LI Jie,WANG Chao,LUO Jian-ren,LAI Zi-ni.Spatial and Temporal Distribution of Larval Rusources of Fishes in Xijiang River[J].Freshwater Fisheries,2007,37(4):37-40. |
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| Authors: | TAN Xi-chang LI Xin-hui TAO Jiang-pin LI Jie WANG Chao LUO Jian-ren LAI Zi-ni |
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| Institution: | 1.Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510380; 2. Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072 |
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| Abstract: | 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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| Keywords: | Xijiang River larval rusources of fishes spatial and temporal distribution |
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