贵州北部云南光唇鱼野外和驯养种群的生长模式研究

Study on the Growth Pattern of Wild and Domesticated Populations of Acrossocheilus yunnanensis in Northern Guizhou

【目的】探明贵州北部云南光唇鱼(Acrossocheilusyunnanensis)自然栖息环境和驯养条件下体长与体重的关系,分析其群体生长规律,为当地云南光唇鱼资源的保护和开发提供参考。【方法】测定野外种群和驯养种群个体的体长、体重,利用单因素方差分析、t检验、幂函数回归等方法分析有关指标。【结果】云南光唇鱼野外种群体长为80~171 mm,平均体长为(134.55±20.34)mm;驯养种群体长为150~245 mm,平均体长为(167.51±15.18)mm;平均体长驯养种群显著大于野生种群。云南光唇鱼野生种群体重为21~112 g,平均体重为(69.92±18.99)g;驯养种群体重为52.9~143.0 g,平均体重为(78.03±18.42)g;驯养种群平均体重显著大于野生种群。云南光唇鱼野外种群体长和体重均呈左偏分布,驯养种群均呈右偏分布。从变异系数看,云南光唇鱼野外种群体长和体重整齐度均低于驯养种群。云南光唇鱼体长-体重关系式野生种群为W=0.0011L^(1.9896)(n=100,R^(2)=0.9847),驯养种群为W=0.0002L^(2.2119)(n=100,R^(2)=0.7758)。野生种群与驯养种群体长与体重参数a值和b值分别为0.000005~0.009397和1.5176~2.8341。野生种群与驯养种群的参数a值呈由高到低的变化趋势,参数b值呈与a值相反的变化趋势。单因素方差分析表明,云南光唇鱼野外种群与驯养种群各阶段体长与体重关系参数a值、b值差异不显著。t检验表明,野外种群b值与3差异极显著,驯养种群b值与3差异不显著。【结论】贵州北部云南光唇鱼野外种群生长为负异速生长,人工驯养条件下为等速生长。贵州北部云南光唇鱼野生环境优于驯养试验环境,天然栖息环境和驯养环境的综合环境条件均较差。

【Objective】It aimed to study the correlation between body length and weight of Acrossocheilus yunnanensis in northern Guizhou with natural habitat or domesticated condition,as well as to analyze the population growth rules,so as to provide reference for protecting and developing A.yunnanensis resources in local area.【Method】The body length and weight of both the wild populations and domesticated populations of A.yunnanensis were measured,and the relative indexes were analyzed through one-way ANOVA,t-test,and power function regression.【Result】The body length of wild populations of A.yunnanensis ranged from 80 to 171 mm,with an average length of(134.55±20.34)mm,and the body length of domesticated populations ranged from 150 to 245 mm,with an average length of(167.51±15.18)mm.The body weight of wild populations of A.yunnanensis ranged from 21 to 112 g,with an average weight of(69.92±18.99)g,and the body weight of domesticated populationsranged from 52.9 to 143.0 g,with an average weight of(78.03±18.42)g.average body length and weight of domesticated populations were both significantly bigger than those of wild populations.The length and body weight of wild populations of A.yunnanensis showed left-skewed distributions,while those of domesticated populations showed a right-skewness distribution.The coefficient of variation revealed that the evenness in length and weight among wild populations of A.yunnanensis was lower than that observed in domesticated populations.The relationship between length and body weight of wild populations and domesticated populations of A.yunnanensis were W=0.0011L^(1.9896)(n=100,R^(2)=0.9847),and W=0.0002L^(2.2119)(n=100,R^(2)=0.7758),respectively.The parameters a of body length of wild populations and domesticated populations ranged from 0.000005 to 0.009397,and the parameter b of body weight of wild populations and domesticated populations varied from 1.5176 to 2.8341.Parameter a showed a trend from high to low from wild populations to domesticated populations,and parameter b was opposite to that of parameter a.The results of the one-way ANOVA analysis indicated that there were no statistically significant differences in the parameters a and b of wild populations and domesticated populations.The t-test revealed significant difference bewteen the b value and 3 in wild populations,while no significant difference was observed between the b and 3 in domesticated populations.【Conclusion】The growth of the wild populations of A.yunnanensis in northern Guizhou is negative allometric growth,and the growth of domesticated populations is isokinetic growth.The wild environment of A.yunnanensis in northern Guizhou is superior to the domestic test environment,while its comprehensive ecological environment is inadequate in both natural habitat and domestic environment.