【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。更多还原

【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.更多还原