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《Journal of Anhui Agricultural Sciences》 2009-21
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Study on the Age and Growth of Rhinogobio ventralis in Jinsha River

BAO Xin-guo et al (College of Fisheries,Huazhong Agricultural University,Wuhan,Hubei 430070)  
[Objective] The purpose was to research the age and growth of Rhinogobio ventralis(Savage et Dabry) in Jinsha River,and accumulate the basic biology information for the effective protection and rational utilization of its resources.[Method] 161 fishes of R.ventralis were collected from the section of Jinsha River in Pianjiao rural area,Yongsheng County,Lijiang City as specimens,the fish age was identified with scale and back calculated the fish body length,the regression equation for body length and scale length,body length and body weight of R.ventralis were fitted through relative analysis to obtain the growth equation and the growth rate and growth acceleration equations of body length and body weight.[Result] The catches of R.ventralis were consisted of five age groups with the 1-3 years old as the main.The body length(L) was linearly related to scale radius(R) as L=25.373+56.331R.The relation of L and body weight(W) was W=1.7×10-5L3.007 3,and its growth law denoted by von Bertalanffy equation as Lt = 278.696 6(1-e-0.329 62(t+0.258 86)),Wt = 383.436 4(1-e-0.329 62(t+0.258 86))3.007 3.The growth age at inflection point was 3.08 year old and the corresponding body length and body weight were 186.02 mm and 113.69 g,resp.[Conclusion] It was in favor of the resource scientific protection and increment of R.ventralis by strictly limiting the catch of fish about 200 mm length under 3 years old.
【Fund】: 金沙江干流中游段水电梯级环境影响及对策研究水生生物专题
【CateGory Index】: S931.1
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