4Sharp P J. Strategies in avian breeding cycles [J ]. Animal Reproduction Science, 1996,42: 505-513.
5Sharp P J,Blache D.A neuroendocrine model for prolactin as the key mediator of seasonal breeding in birds under long- and short-day photoperiods Canadian[J ]. Physiology and Pharmacology,2003,81: 350-358.
6Hahn T P,BosweU T,Wingfield J C,Ball G F. Temporal flexibility in avian reproduction[J]. Curren Ornithology,1997,14:39-80.
7Akesson T R,Raveting D G. Endocrine and body weight changes of nesting and non-nesting Canada geese [J ]. Biology of Reproduction, 1981,25(4) :792-804.
8Dittami J P,Goldsmith A R,FoUett B K. Seasonal changes in follicle-stimulating hormone in a breeding population of barheaded geese. Anser indicus [J]. General and Comparative Endocrinology, 1985,57 : 195 - 197.
9Hargitai C,Forgo V,Mezes M,et al. Seasonal and circadian fluctuation of plasma LH level and its change in the domestic goose as an effect of GnRH treatment[ J]. Acta Biological Hunganca, 1993,44:255-268.
10Izumi T,Shimada K,Satto N,et al. Changes in body weight, egg production,hackle growth,and plasma sex steroid hormones and prolactin during the annual cycles in domestic geese [J]. Japanese poultry Science, 1992,29:378-388.