黄喉拟水龟的繁殖生物学研究
REPRODUCTION OF YELLOW POND TURTLE,MAUREMYS MUTICA
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摘要: 1998年4-11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25枚;卵重平均13.95g;长径平均4.34cm;短径平均2.23cm.卵重与卵长径呈正相关关系.在25-32℃、沙床含水量5-10%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、宽呈极显着的正相关关系.稚龟经8-11月3个月生长,平均日增重0.149g.稚龟体重、背甲长、宽与日龄呈极显着的正相关关系,稚龟体重与背甲长宽也呈极显着的正相关关系.Abstract: 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 Wegg =2.8863Legg +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: W0=4.9367L1-8.8767(r1=0.7615), W0=3.7921L2-1.2762(r2=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: Wt=0.1569t+8 9836(r=0.9941), L1t =0.0182t+3.7343(r1=0.9896), L2t =0.0176t+3.1611(r2=0.9685). The relationship among juvenile weight and carapace length and width is: Wt=8.1567L1-21.361(r1=0.9872), Wt=7.8831L2-15.403(r2=0.9438).
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Keywords:
- Mauremys mutica /
- Biology of reproduction
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