Skeletochronological Study of Age, Longevity and Growth in a Population of Rana nigromaculata (Amphibia: Anura) in Sichuan, China: Skeletochronological Study of Age, Longevity and Growth in a Population of Rana nigromaculata (Amphibia: Anura) in Sichuan, China

Pub Date : 2012-12-04 DOI:10.3724/SP.J.1245.2012.00258

M. Min, Huang Yan, Zhiping Mi, Yanhong Liu, Caiquan Zhou

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引用次数: 6

Abstract

A skeletochronological study was conducted for the age,longevity and growth of a Rana nigromaculata population in northeastern Sichuan,China.Of 139 specimens,119 (68 males and 51 females) exhibited distinct arrested growth lines in phalanges.Age at first reproduction was found to be two years of age for males and three for females.Maximum longevity was estimated to be at least six years in males and seven years in females.Average age did not differ between males and females.Breeding females were significantly older than breeding males.Females were larger in body size and heavier in body mass than males.Age was not correlated with body size and body mass in males,but a significant correlation was found among age,body size and body mass in females.The growth curve appeared significantly different between the sexes,with a higher growth rate throughout life and a larger asymptotic size in females.Moreover,analysis of the growth model indicated that the population studied was relatively stable.

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四川黑斑蛙(Amphibia: Anura)种群年龄、寿命和生长的骨骼年代学研究四川黑斑蛙(Amphibia: Anura)种群年龄、寿命和生长的骨骼年代学研究

对四川东北部黑斑蛙种群的年龄、寿命和生长进行了骨骼年代学研究。139个标本中，119个(68个雄性和51个雌性)在指骨上表现出明显的生长受阻。首次繁殖的年龄男性为两岁，女性为三岁。据估计，雄性的最长寿命至少为6年，雌性为7年。男性和女性的平均年龄没有差异。繁殖雌性明显大于繁殖雄性。女性的体型比男性大，体重比男性重。男性的年龄与体型和体重没有相关性，但女性的年龄、体型和体重之间存在显著相关性。两性之间的生长曲线存在显著差异，雌性的终生生长速率较高，渐近大小较大。此外，生长模型分析表明，所研究的种群相对稳定。

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