华中农业大学学报2026，Vol.45Issue(2)：9-17,9.DOI:10.13300/j.cnki.hnlkxb.2026.02.002
金沙江流域黄石爬鮡的年龄与生长特性
Characteristics of age and growth of Euchiloglanis kishinouyei in Jinsha River Basin
摘要
Abstract
To evaluate the long-term trends in the germplasm resources of Euchiloglanis kishinouyei in the Jinsha River Basin,the age composition and growth characteristics of 208 samples collected from the basin in 2004 were preliminarily analyzed,and then compared with the population data from the same water body in later periods.The results showed that:(1)The samples'body length ranged from 114 to 286 mm,and body weight ranged from 25.0 to 470.0 g;115 fish ages were identified,ranging from 4 to 14 in-stars,primarily between 8 and 11 instars.The relationships between body length(L)and body weight(W)was W=3×10-5L2.8838(R2=0.918 8,n=208),indicating a consistent growth pattern.The body length and body weight growth were modeled using the von Bertalanffy growth equation were as follows:Lt=248.3[1-e-0.089(t+2.495)],Wt=242.0[1-e-0.089(t+2.495)]2.8838.The inflection point age was 9.38 years,with corresponding body length and body weight of Li=162.2 mm and Wi=70.9 g,respectively,indi-cating slow growth of E.kishinouyei in the Jinsha River Basin.(2)Compared with the data from the late stage of the same water population,the maximum body length,maximum body weight,and maximum age of the E.kishinouyei in this study are greater,with a higher proportion of large and older individuals.The value of b in the body length-body weight relationship was higher,indicating an isometric growth pattern,which differs significantly from the allometric pattern observed previously(b=2.459 6<3)for E.kishi-nouyei in the same water area during 2018-2019.The inflection point age is delayed,and the proportion of individuals beyond this age is higher.Additionally,the asymptotic length L∞,asymptotic weight W∞ and ap-parent growth index φ were all larger.It is showed that the populations of E.kishinouyei exhibit a significant trend of reduced age and miniaturization over time.Relevant conservation efforts should be implemented as soon as possible to protect the important germplasm resources of E.kishinouyei in the Jinsha River Basin.关键词
黄石爬鮡/年龄/生长/脊椎骨/金沙江Key words
Euchiloglanis kishinouyei/age/growth/vertebra/Jinsha River分类
农业科技引用本文复制引用
苏晓静,唐茂刚,熊皓,余宗泽,杨瑞斌,马徐发,杨学芬..金沙江流域黄石爬鮡的年龄与生长特性[J].华中农业大学学报,2026,45(2):9-17,9.基金项目
华电集团金沙江上游远期放流鱼种人工繁育技术研究(T-2022-04) （T-2022-04）
