摘要
根据在西藏温泉蛇的重要栖息地——羊间温泉的实地观察,发现西藏温泉蛇主要以高山蛙、异齿裂腹鱼和高原鳅为食,以活吞为常见。捕食地点以河岸、河流以及湿地为主。栖息地内高山蛙种群数量330只,鱼的种群数量298条。温泉蛇捕食高山蛙的时间大约需要1h,100﹪从头部开始吞食。温泉蛇捕食鱼的最短时间为3min,最长为47min,平均17min。从头部开始吞食的占80﹪,从尾部开始吞食的占20﹪。西藏温泉蛇的数量少,分布地区狭窄。由于人类活动的干扰,正在构成对温泉蛇的极大威胁。因此,文章认为开展对温泉蛇保护工作显得刻不容缓。
According to the observation of the Tibetan hot spring snake habitat in Yangjian, the Tibetan hot spring snake mainly take the Altirana Seeineger, Schizothorax o＇connori and Triplophysa sp as their food, normally they swallows the live rog and fish. The preying always takes place on the bank of the river and some parts of wet land in the habitat. According to our observation, the snake first catches the fish in the water, then brings it back to the bank of the river. We uses the capture and recapture method to estimate the population of the Tibetan hot spring snake, Altirana Seeineger, Schizothorax o＇connori and Triplophysa sp, the population size was 278.5, 330 and 297.5 respectively in the study site . It probably takes one hour for the hot spring snake to prey on the Ahirana Seeineger probably and the hot spring snake starts to eat Altirana Seeineger from the head .The shortest time for the hot spring snake eat a fish is 3 minutes, the longest one is 47 minutes and the average is 17 minutes. The proportion of the hot spring snake starting to eat from the head is 80 % and that of starting from the tail is 20 %. The population of the Tibetan hot spring snake is very small, and the distribution area is also narrow. The human disturbance is already become a threat to the hot spring snake.
关键词
羊间温泉
温泉蛇
食性分析
取食行为
Yangjian hot spring
hot spring snake
analysis of food
eating habit
