.... The present study describes the use of a recently developed electronic data logger to obtain simultaneous recordings of the swimming speed, depth, fin-beating activity and body angle of free-ranging chum salmon Oncorhynchus keta during their homing migration in coastal waters. Chum salmon migrated...

... information. We studied behavioural thermoregulation of 31 free-ranging chum salmon Oncorhynchus keta using micro data loggers off the Sanriku coast from early October to December. The surface water temperature was approximately 20 °C in early October and decreased to approximately 12 °C in December...

...Takahito Shikano; Yoshihisa Fujio ABSTRACT Immunolocalization of the α-subunit of Na + /K + -ATPase was examined in the gill epithelium of chum salmon (Oncorhynchus keta) fry during acclimation to brackish water (25 ‰ salinity) and reintroduction to fresh water. In freshwater fish, strong...

...S. Morisawa; M. Morisawa ABSTRACT The male reproductive organ of rainbow trout and chum salmon consists of a pair of testes and sperm ducts. Spermatozoa in the distal portion of the sperm ducts exhibit full motility in the K + -free medium. However, spermatozoa from the testis were almost immotile...