粤北南岭无斑肥螈的种群结构及食性

南岭山区的无斑肥螈 (Pachytritonlabiatus)主要分布于海拔 85 0m以上的山区溪流中 ,当雌性头体长 >5 5mm ,雄性头体长 >4 5mm时 ,卵巢和精巢分别开始明显发育 ;生殖时期为每年 9～ 1 0月份 ;数量呈明显下降趋势 ;主要食饵为环节、软体、节肢动物类。

A Primary Study on Structure and Food Habit of Pachytriton labiatus in Nanling at North of Guangdong

The paper reported population structure and food habit for Pachytriton labiatus found in Nanling Reserve located in the northern part of Guangdong Province. The animal occurrs in small streams in mountains with a elevation of 850 metres and above. The ovary and testis of the animal begin growth evidently when their body sizes grow as long as 55*!mm for female and 45*!mm for male. Breeding season occurrs in September and October, the animals lay their eggs in that period of time. The population size has are the breeding season reduced sharply. Species of annelids, molluscs and insects form the major food items of Pachytriton labiatus.