Breeding Ecology of Lanius isabellinus isabellinus in Anxi Extreme Desert of Gansu Province
The reproductive characteristics of Rufous-tailed Shrike (Lanius isabellinus isabellinus) in Anxi Extreme-Arid Desert National Nature Reserve,(Gansu Province,China),were investigated using spot sampling method from April to August of 2010.We measured the egg and the nestling size every day and analyzed the relationship between the egg volume and the laying eggs order by ANVON.The nestling growth was predicted by Logistic equations.The breeding season lasted from the end of April to early August.The average clutch size of was 4.67 ± 0.57 (n =21) and the average egg volume was 3.14 ± 0.32 cm3 (n =95),fresh egg mass was 3.48 ± 0.20 g (n =20) respectively.The egg volume was significantly decreased with the laying eggs order (R =-0.427,P =0.021,n =29),which match with "brood reduction strategy".Incubation occurred after the first egg been laid by female only,and the male was responsible for courtship feeding and guarding.The average incubation temperature measured by Data-logger was 38.19 ± 0.77℃.The duration of incubation was 15-16 days and the nestling period lasted 12-15 days.The hatching success of this population was 82.50％ (n =80) and 46.25％ egg was successed hatched (n =80).About 56.06％ of nestling leaving (n =66) and the nestling success was 58.62％ (n =29) respectively.Only one couple of of the 12 nests that we had marked hatchen their second brood in 2010.
Extreme-Arid DesertLanius isabellinu isabellinuReproductive ecologyAnxi National Nature Reserve
NETL
NSTL
万方数据
维普
