温度对黄喉拟水龟稚龟生长的影响

Influence on growth of juvenile Mauremys mutica by temperature

目的:通过研究黄喉拟水龟稚龟在不同温度下的生长情况,了解温度与龟的生长关系,为龟类的人工养殖提供理论依据.方法:两组龟分别在恒温与室内常温条件下饲养165d,每隔5d测量其体质量、背甲长、背甲宽和体厚,然后进行统计学分析.结果:实验结束时,恒温越冬的稚龟平均背甲长为53 420mm,背甲宽为44 761mm,体厚为23 307mm,体质量为29 768g,日增质量为0 193g,存活率为100%.常温越冬的稚龟平均背甲长为47 185mm,背甲宽为39 868mm,体厚为20 023mm,体质量17 304g,日增质量为0 025g,存活率为90%.两组稚龟的体质量与背甲长、体质量与背甲宽、体质量与体厚、背甲长与背甲宽、背甲长与体厚以及背甲宽与体厚之间均存在着显著的正相关关系.常温下体质量的生长模式为:m=18 4822-0 0642D+0 004D2;恒温下体质量的生长模式为:m=17 273337e0 005982D.在同等条件下,稚龟个体间的生长也有差异.结论:温度与龟的生长有密切关系,加温可以促进龟的生长.

Aim： In order to understand the relationship between the temperature and growth of turtles and offer the theoretical proof for the manpower breeding of turtles, the juvenile Mauremys mutica growth which fed under different temperature conditions were studied. Methods： Two groups of juvenile turtles were fed separately at indoor constant temperature and indoor normal temperature for 165 days. Their body weight, carapace length, carapace width and body thickness were measured every 5 days and the statistic analysis were carried out at the end of experiment. Results： After 165 days, the average carapace length is 53.420 mm, the average carapace width is 44.761 mm, the average body thickness is 23.307 mm, the average body weight is 29.768 g, the average growing weight by day is 0.193 g and the survival ratio is 100% for juvenile turtles that fed under constant temperature condition. The average carapace length is 47.185mm, the average carapace width is 39.868 mm, the average body thickness is 20.023 mm, the average body weight is 17.304 g, the average growing weight by day is 0.025 g and the survival ratio is 90% for juvenile turtles that fed under normal temperature condition. There are obviously positive correlation in the body weight and carapace length, the body weight and carapace width, the body weight and body thickness, the carapace length and carapace width, the carapace length and body thickness as well as the carapace width and body thickness for the two groups of juvenile turtles. The growth model under normal temperature is： m=18.4822-0.0642D ＋ 0.004D^2 and the growth model under constant temperature is： m= 17.273337e^0.005982D The experiment also indicates that the growth of the juvenile turtles is different among individuals under the same condition. Conclusion： According to the above results, we conclude that the growth of Mauremys mutica is closely related to the temperature. High temperature stimulates the growth of juvenile turtles.