摘要
20 0 1年在杭州小和山北草蜥繁殖季节的 3个时段分别捕得两性成年个体 ,解剖后鉴定性别 ,分离躯干、尾、肝脏和腹脂肪体 ,并测定其重量。按雌体卵的状态 (休止卵、卵黄沉积卵和输卵管卵 ) ,卵黄沉积始于 3月下旬 (T1) ,首窝卵产于 5月上旬 (T2 ) ,部分 (37% )终止繁殖于 6月中旬 (T3)。从T1到T2 ,雌性腹脂肪体从平均 17 3mg至消失 ,而雄性从 6 3mg减至 0 8mg ,雌性减量是雄性的 3倍。两性 6月中旬腹脂肪体消失 ,而躯干、尾和肝脏的脂肪含量在 3个时段无显著变化。很可能雌性腹脂肪体的消耗使首窝卵产出时间提前 ,从而增加单个繁殖季节的窝数和总的繁殖成功率。
Adult northern grass lizards (Takydromus septentrionalis) were collected at Mt.Xiaohe,Hangzhou in three periods of the breeding season,2001.They were dissected to determine sex,and storages of lipids in abdominal fat bodies,carcass,tail and liver.According to the stage of egg development (non-vitellogenetic follicles,yolked follicles,and oviductal eggs),females started vitellogenesis in later March (T1),produced eggs of the first clutch in early May (T2),and partly (37% of the sex) ceased reproduction in mid-June (T3).From T1 to T2,the abdominal fat body of females decreased from 17.3 mg on average to zero,and that of males changed from 6.3 mg to 0.8 mg.The decline of the lipid in females was 3 times of that of males.However,there was no significant change in lipid contents of the carcass,tail and liver in the three periods.It is very likely that the abdominal fat body of females is used for the first clutch of eggs,and earlier production of eggs means more clutches in the season and higher reproductive success.
基金
浙江省自然科学基金青年人才专项基金资助项目 (RC970 19)
杭州市人才基金资助项目
关键词
北草蜥
繁殖
腹脂肪体
繁殖季节
Northern grass lizard (Takydromus septentrionalis)
Reproduction
Abdominal fat bodies
