Zhang X, Yang W, Liang W, Wang Y, Zhang S. Intensity dependent disruptive effects of light at night on activation of the HPG axis of tree sparrows (Passer montanus). Environ Pollut. 2019;249:904-909 pubmed publisher
..These results reveal that low intensity ALAN accelerates the activation of the reproductive endocrine process in the HPG axis, whereas high intensity ALAN retards it. ..
Zhang S, Xu X, Wang W, Zhao L, Gao L, Yang W. Annual variation in the reproductive hormone and behavior rhythm in a population of the Asian short-toed lark: Can spring temperature influence activation of the HPG axis of wild birds?. Horm Behav. 2017;95:76-84 pubmed publisher
Zhang S, Xu X, Wang W, Yang W, Liang W. Clock gene is associated with individual variation in the activation of reproductive endocrine and behavior of Asian short toed lark. Sci Rep. 2017;7:15002 pubmed publisher
..These results suggest that the Clock gene influences the reproductive timing of birds through its effect on the HPG endocrine axis, and that individual variation in the timing of reproduction may have a genetic basis. ..