降雨决定繁殖期红瘰疣螈的活动性

Rainfall Shaped Breeding Activities of Tylototriton shanjing

有尾两栖类的繁殖活动常常受到环境因子,特别是如温度、湿度和降雨等气候因子的限制。红瘰疣螈Tylototriton shanjing是适应云南山地环境的典型有尾两栖类动物。本研究期望通过对繁殖期红瘰疣螈活动个体数量的野外调查和气候因子的分析,弄清影响红瘰疣螈繁殖行为活动的关键气候因子。研究结果显示,繁殖期红瘰疣螈活动个体数量与气温呈显著的负相关关系,与空气相对湿度和降雨量呈显著的正相关关系。然而偏相关和多元回归分析则表明,红瘰疣螈繁殖行为活动与相对湿度和降雨量关系更密切。红瘰疣螈总是在降雨后引起空气湿度增加以及气温下降时进行各种繁殖行为活动,降雨是影响红瘰疣螈繁殖行为活动关键的气候因子。红瘰疣螈的繁殖行为活动与降雨节律保持一致是对云南山地环境的重要适应。

Breeding activities of caudate animals are usually constrained by environmental factors, especially by climatic factors such as temperature, relative humidity, and rainfall etc. Red knobby newt （ Tylototriton shaufing） is a typical montane caudate adapt to Yunnan mountainous environment. This study aimed to clarify the key climatic factors, which influenced the breeding activities of red knobby newt, through field investigation of the number of active newt and analysis of climatic factors. The results showed that daily newt numbers in active were negatively related to daily air temperature, and positively related to daily relative humidity and rainfall. However, results from partial correlation and multiple regression analysis indicated that breeding activities of the red knobby newt were more closely related to relative humidity and rainfall. The newts increased their breeding activities when air temperature decline and humidity increase, which were caused by rainfall, therefore, rainfall was the key climatic factor which influenced the breeding activities of the red knobby newt. Breeding activities of the red knobby newt kept consistent with the rainfall rhythm was an adaption to Ynnnan mountainous environment.