自然环境下影响扬子鳄繁殖的环境因子

生态因子对生物的生长、发育、生殖和分布有着直接和间接的影响.在1998～2005年对扬子鳄繁殖研究中心内自然环境下鳄卵及其繁殖地环境因子进行调查,包括窝卵数、产卵时间、出壳时间、孵化期内温度、湿度的变化情况、雏鳄孵出后的存活数量以及巢区的植被盖度.调查发现天气状况直接影响母鳄产卵时间、卵的孵化质量与雏鳄的出壳数量.盖度相对大于0.5的窝巢中多数卵基本能正常发育,盖度小于0.5的窝巢中可能只有少数几枚卵发育正常.

The Reproductive Environmental Factors of Chinese Alligator (Alligator sinensis)in the Unartificial Environment

Ecological factors have a direct and indirect effect on the growth, development, reproduction, and distribution of an organism. Chinese alligator eggs and reproductive environmental factors have been investigated from 1998 to 2005 in the Anhui Research Center for Chinese Alligator Reproduction. The study included clutch size, time of laying eggs, time of hatching, temperature and humidity during incubation, number of hatchlings, and vegetation canopy density over the nesting sites. The investigation indicated that weather has a direct effect on the time eggs are laid, the quality of incubation and the number of hatchlings. Eggs can develop healthily and large if the relative canopy density over the nest is more than 0.5, while few can develop normally if the canopy is less than 0.5.