镇海棘螈瑞岩寺种群年度繁殖量比较及分析

Annual Reproduction Comparison and Analysis of Chinhai Salamander(Echinotriton chinhaiensis)Ruiyansi Population

将镇海棘螈Echinotriton chinhaiensis瑞岩寺种群2008年的繁殖情况与1998、1999、2000年的繁殖量进行比较,发现虽然雌性平均窝卵数比较稳定,但2008年的繁殖总量小于其余3年任何一年总产卵量的50%。对其繁殖量大幅下降的原因进行了分析,发现2007年9、10月两次影响严重的强台风、瑞岩寺景区开发等因素可能是造成种群繁殖量大幅下降的原因,而2008年初50年不遇的低温是否影响镇海棘螈的繁殖值得进一步追踪研究。

Chinhai salamander （Echinotriton chinhaiensis） , which is narrowly distributed and has a very small population size, can only be found in Ningbo District, Zhejiang Province, China. This presents a serious problem for Echinotriton chinhaiensis＇s future viability because anthropogenic factors like construction and tourism development and recent extreme weather pose a threat to this species. This article compares the Chinhai salamander＇s annual reproduction in the years 1998, 1999, 2000 and 2008, found that in 2008, there is a huge decline in Echinotriton chinhaiensis＇s annual reproduction. After analyzing it from several aspects ： weather, tourism development and so on, it turned out that the huge decline in 2008 was probably caused by the typhoon in 2007, in addition to the effect of tourism development and cash crop planting. The impact of extreme weather in 2008 on the reproduction of Chinhai salamander needs further investigation.