supported by the National Natural Science Foundation of China (Grant No. 30400047);the Training Fund of Northeast Normal University Scientific Innovation Project (Grant No. 07013);the Jilin Provincial Science and Technology Department (Grant No. 20070558 and 20090575)
Fisher's theory predicts equal sex ratios at the end of parental care if the cost associated with raising offspring of each sex is equal.However,sex ratios have important evolutionary consequences and are often biased...
supported by the National Natural Science Foundation of China(Grant No.30400047);the Fund for Talent Training for Basic Sciences(Grant No. 201108149);the National Infrastructure of Natural Resources for Science and Technology(Grant No. 2005DKA21403).
The diet of Common Kestrels Falco tinnunculus was studied during the breeding seasons from 2004 to 2008 in Northeast China. Diet was determined by direct observation of the prey brought to nests, and analysis of prey ...
supported by the National Natural Science Foundation of China (Grant No.30400047);the Training Fund of the Northeast Normal University's Scientific Innovation Project (Grant No 07013)
For a total of 9 years,we examined the patterns of a nesting raptor community that utilized European Magpie(Pica pica) nests in the Zuojia Natural Reserve,northeast China.Eight raptor species and two other bird specie...