甘肃康县棘腹蛙种群资源调查与分析

于2007年4月开始对甘肃陇南市康县分布的棘腹蛙种群数量及其栖息环境进行了为期7个月的初步调查。调查发现：从4月出蜇到8月繁殖高峰期间，种群内成体数量呈现较明显的增加，且距人类生活区越近，种群数量越小。综合调查和走访结果，可以确定棘腹蛙在该地区的种群数量已很少，且各个斑块内均为小种群；影响种群变化的主要因素是人类的活动带来直接和间接影响，如社区居民大量捕捉，农药化肥污染，冶矿企业废水、废渣污染等造成栖息生境退化或丧失；棘腹蛙的生存范围在逐渐地向远离人类活动区域的方向缩减。因此，需要加大保护力度，以确保甘肃南部的这一独特两栖类种群继续生存繁衍。

INVESTIGATION AND ANALYSIS ON POPULATION OF PAA BOULENGERI IN KANG COUNTY,GANSU PROVINCE

In April 2007,the primary investigation of 7 months on the population and habitat of Paa boulengeri distributed in Kangxian County,Longnan City,Gansu Province was carried out.It shows that from April out of hibernation to the breeding peak in August,the individuals of population increased obviously,and the number decreased gradually towards the residence of human.The comprehensive survey and visit confirmed that the number was getting fewer,each plaque with small populations.The main factor influencing the population is human activity,such as killing by local resident on a large scale,pollution by farm chemical and fertilizer,waste water from metallurgy factory and waste residue etc.,which brought the loss or degradation of habitat.The living scale of Paa boulengeri descended toward the residence of human.Therefore,the protecting policy should be strengthened for the continuous living of the unique species in the south of Gansu Province.