雄性斑腿泛树蛙两侧睾丸的对称性研究

雄性个体两侧睾丸大小的不对称性存在于很多动物类群.补偿假说认为当雄性一侧睾丸受损时,另一侧的睾丸可通过增强自身大小来补偿受损侧睾丸的功能降低,从而导致两侧睾丸大小之间产生不对称性.为检验这一假说,我们比较了斑腿泛树蛙两侧睾丸大小的差异性.研究发现雄性斑腿泛树蛙两侧睾丸大小之间不存在显著性差异,且两侧睾丸之间不对称性强度与雄性身体质量之间不存在相关性.本研究结果不支持Mller提出的睾丸补偿假说.

No evidence for the compensation hypothesis in Polypedates megacephalus

Testes size in most animals commonly shows directional asymmetry.The compensation hypothesis states that an increase in size of one testis can compensate for a reduced function in the other testis.Here we tested the compensation hypotheses in Polypedates megacephalus,by analysing difference between left and right testes mass.From 43 sampled males,we found no difference between left and right testis mass and no correlations between relative testis size and body condition.These findings suggest that either testis cannot serve a compensatory role in P.megacephalus.