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骨龄学方法对林蛙生长发育特性的研究应用
Skeletachronological Study on Growth Regular of the Dybowski’s Frog
【摘要】 采用骨龄学方法,对半人工养殖的120只东北林蛙(Rana dybowskii)进行年龄鉴定,将样本分为6个年龄组(2~7龄),并在此基础上研究了林蛙的性成熟年龄、生长速率及性别二型性等。结果表明:林蛙性成熟年龄为3岁;雌蛙平均体长(64.79±8.41)mm显著大于雄蛙平均体长(60.83±4.46)mm(P<0.05);雌蛙平均体重(27.75±10.02)g显著大于雄蛙平均体重(19.81±4.46)g(P<0.05);雌蛙平均趾骨直径(476.78±61.73)μm大于雄蛙平均趾骨直径(473.79±62.63)μm,但不显著(P>0.05);由von Bertalanffy′s(1938)方程得到雌蛙生长速率(0.429)小于雄蛙生长速率(0.567),由此推断出雄蛙生长快于雌蛙。
【Abstract】 In this research,the age,growth rate and sexual dimorphism in population of the Dybowski′s frog(Rana dybowskii) from half ratified farm were studied in 2010.The result showed that age of frog ranged from 2-7 years among 120 individuals.Endosteal resorption might have eroded away the first LAG in only 12.50% of the samples,maturity age was 3 years old.The mean Sount-Vent Length was(60.83±4.46) mm in males and(64.79±8.41) mm in females,the mean body mass was(19.81±4.46) g in males and(27.75±10.02) g in females,the mean length and body mass of females frogs were significant higher than those of males(P<0.05),the mean phalanx diameter was(476.78±61.73) μm in females and(473.79±62.63) μm in males,but on significant.The growth coefficient(k) was 0.567 in males and 0.429 in females.
- 【文献出处】 经济动物学报 ,Journal of Economic Animal , 编辑部邮箱 ,2011年03期
- 【分类号】S917.4
- 【被引频次】10
- 【下载频次】310