Annual cycle of plasma oestradiol-17β in the female trout Salmo gairdneri J. G. D. LAMBERT, G. I. C. G. M. BOSMAN, R. VAN DEN HURK and P. G. W. J. VAN OORDTAnn. Biol. anim. Bioch. Biophys., 18 4 (1978) 923-927DOI: https://doi.org/10.1051/rnd:19780526