采用渔业声学方法和GIS模型对楠溪江鱼类资源量及空间分布的评估  

Assessment of fish abundance and distribution using fisheries acoustics and GIS modeling in the Nanxi River of Wenzhou City

作　　者：陶江平[1] 艾为明[2,3] 龚昱田[1] 陈志俭[3,4] 李尚鲁[3,5] 谢起浪[3,5] 陈少波[3,5] 周志明[3,5] 

机构地区：[1]水利部/中国科学院水工程生态研究所,武汉430079 [2]温州医学院生命科学学院,温州325035 [3]浙江省近岸水域生物资源开发与保护重点实验室,温州325005 [4]永嘉县农业局,温州325100 [5]浙江省海洋水产养殖研究所,温州325005

出　　处：《生态学报》2010年第11期2992-3000,共9页Acta Ecologica Sinica

基　　金：浙江省科技计划资助项目(2007F10011;2009F20009);温州市科技计划资助项目(S20080048;S20090054)

摘　　要：采用快捷、直接、经济的渔业声学调查方法,结合GIS模型对温州楠溪江4个主要渔业作业区域的鱼类空间分布及资源量进行了评估。结果表明,4个区域的鱼类平均目标强度为(-55.03±5.44)dB,平均体长约为7cm,范围3—10cm,各区域的鱼类大小没有显著的统计学差异(P>0.05)。同时4个区域的鱼类平均密度为8.87ind./1000m3,95%置信区间为1.66—16.09ind./1000m3。其中区域Ⅲ的鱼类密度最高,平均密度为(20.06±9.34)ind./1000m3。通过鱼类分布的GIS图形得知,鱼类的空间分布呈现斑块状的分布形式。按照ArcGIS对鱼类密度进行的栅格化数据,并结合各个栅格所代表的水体体积,进行鱼类资源量的估算,结果为4个探测区域的鱼类总尾数为2.5万尾,各个区域的鱼类资源量分别为:3971ind.、11478ind.、6587ind.、2978ind.。Fisheries acoustics methods have been applied in fisheries investigation and research for decades,which superiored in direct,effectual,economical and does not result in fish mortality in fish sampling. They have been used to acquire the in situ information,such as fish abundances,temporal-spatial distribution and behaviours. Nanxi River is a model stream and is plentiful in fishery resources in the southern part of Zhejiang Province,which is located near the Wenzhou city. The Reach located in Shatou town,Fuli village Shizhu village and Lixi village （ AreaⅠ—Ⅳ） is the major fisheries area. More than 37 fish species had acquired in those areas from 2007 to 2009,with Zacco platypus as the dominant species. In present study,the acoustical fish abundance assessment was conducted in the four Reaches of Nanxi River using EY60 split-beam echosounder （ 200kHz,Simrad） in 4th and 5th October,2008. In post processing analysis,the GIS model had been applied to analysis the fish spatial distribution pattern in AreaⅠ—Ⅲ,using the interpolation method of inverse distance weighting （ IDW） . During such procedure,the survey areas were divided into numerous gridding cells by the grid size of about 30m × 10m in the AreaⅠand AreaⅡ,and an grid size of about 10m × 10m in the Area Ⅲ. The result showed that,the mean target strength of four investigation area is （ - 55. 03 ± 5. 44） dB,and the standard length of fishes are ranging from 3 to 10 cm,with the mean length of 7cm,according to the empirical measures of target strength. The deviation of the fish sizes in the four area are not significant （ P〉 0. 05） . The mean density of four survey area is 8. 87 ind. / 1000m^3,with the 95% confidence interval ranging from 1. 66 ind. /1000m^3 to 16. 09 ind. /1000m^3. The mean fish density of Area Ⅲ is （ 20. 06 ± 9. 34） ind. /1000m^3,which is the highest fish density among these areas. The fish spatial distribution in each survey area are aggregated into plaque pattern,based on the GIS modeling. Howev

关 键 词：渔业声学 地理信息系统(GIS) 楠溪江 空间分布 鱼类资源量 

分 类 号：S932.4[农业科学—渔业资源]