Plasma levels of luteinizing hormone and prolactin in relation to double brooding in Great Tit(Parus major)  

作　　者：Xudong Li Wenyu Xu Jiangping Yu Wutong Zhang Haitao Wang 

机构地区：[1]Jilin Engineering Laboratory for Avian Ecology and Conservation Genetics,School of Life Sciences,Northeast Normal University,Changchun,130024,China [2]Jilin Key Laboratory of Animal Resource Conservation and Utilization,Northeast Normal University,Changchun,130024,China

出　　处：《Avian Research》2022年第1期102-107,共6页鸟类学研究（英文版）

基　　金：supported by the National Natural Science Foundation of China (No.31770419 and 31971402 to HW,32001094 and 31870368 to JY)

摘　　要：The reproductive behaviors of birds are mainly controlled by the hypothalamus-pituitary-gonad axis.Many studies have shown that reproductive hormones are tightly linked to the breeding sub-stages.However,only a few studies have examined the temporal trend of hormone levels among different reproductive stages in multiple brooded species.We investigated the changes in plasma luteinizing hormone(LH)and prolactin(PRL)concentrations during different reproductive stages of the facultative double-brooded Great Tit(Parus major).We found that the concentrations of LH and PRL in females were significantly higher than those in males.Females had significantly higher LH and lower PRL concentrations in the pre-breeding period than in the first/second brooding periods,and there were no significant changes between the first and second brooding periods.The concentrations of LH and PRL in males had no significant difference between the pre-breeding period and the first brooding periods,while LH and PRL concentrations in the second brooding period were significantly higher than those in the first brooding period.We conclude that there are sex-based differences between LH and PRL at different stages of reproduction.The changes in LH and PRL in both males and females should be related to their physiological functions.Especially for males,individuals with higher levels of LH and PRL are more likely to maintain second clutches.

关 键 词：BIRDS Great Tit Luteinizing hormone PROLACTIN Seasonal breeding 

分 类 号：Q958[生物学—动物学]