摘要
1998年 4— 1 1月对黄喉拟水龟的繁殖生物学进行了研究。在广东 ,黄喉拟水龟的产卵高峰期在 5— 6月 ,窝卵量 1— 7枚 ,平均 2 5枚 ;卵重平均 1 3 95g ;长径平均 4 3 4cm ;短径平均 2 2 3cm。卵重与卵长径呈正相关关系。在 2 5— 3 2℃、沙床含水量 5— 1 0 %孵化条件下 ,孵化时间平均 73 8d ,孵化率 84 2 %。初生稚龟均重 9 75g。背甲长平均 3 77cm ;背甲宽平均2 91cm。稚龟体重与背甲长、宽呈极显著的正相关关系。稚龟经 8— 1 1月 3个月生长 ,平均日增重 0 1 49g。稚龟体重、背甲长、宽与日龄呈极显著的正相关关系 ,稚龟体重与背甲长宽也呈极显著的正相关关系。
This paper deals with the reproduction of Mauremys mutica in April-November, 1998. In Guangdong, the egg laying reaches the peak in May and June. The clutch size ranges from 1-7eggs,with average being 2.5eggs, the average egg weight 13.95g, egg length 4.34cm, egg width 2.23cm. The relationship between egg weight and egg length can be expressed as W egg =2.8863L egg +1.4208(r=0.6255). At the temperature varying form 25 to 32℃, the egg takes 73.8 days to hatch in average, when water content of sand is 5-10%. The hatching rate is 84.2%. The juvenile weight is 9.75 g, carapace length 3.77cm, carapace width 2.91cm in average. The relationship among hatchling weight and carapace length and width is: W 0=4 9367L 1-8 8767 (r 1=0.7615), W 0=3.7921L 2-1.2762(r 2=0.6311). When the juveniles grew from August to November, their weight increased 0.149g per day. The relationship between age and weight,carapace length and width of juvenile Mauremys mutica is: W t=0.1569t+8 9836(r=0.9941), L 1t =0.0182t+3.7343(r 1=0.9896), L 2t =0.0176t+3.1611(r 2=0 9685). The relationship among juvenile weight and carapace length and width is: W t=8 1567L 1-21.361(r 1=0.9872), W t=7.8831L 2-15.403(r 2=0.9438).
出处
《水生生物学报》
CAS
CSCD
北大核心
2001年第5期449-454,共6页
Acta Hydrobiologica Sinica
基金
国家948项目(983096)
