Photoperiod induced off-season spawning of coho salmon (Oncorhynchus kisutch) D. W. MacQUARRIE, J. R. MARKERT and W. E. VANSTONE Ann. Biol. anim. Bioch. Biophys., 18 4 (1978) 1051-1058 DOI: 10.1051/rnd:19780545