Seasonal variations in and effect of incubation water temperature on vertebral number in naturally spawning chum salmon Oncorhynchus keta - Daisei Ando; Yoshihito Shinriki; Yasuyuki Miyakoshi; Hirokazu Urabe; Ryohei Yasutomi; Tomoya Aoyama; Yoshitaka Sasaki; Masamichi Nakajima (Fisheries Science, 2011)