NDLI: Seasonal variations in and effect of incubation water temperature on vertebral number in naturally spawning chum salmon Oncorhynchus keta

Content Provider	Springer Nature Link
Author	Ando, Daisei Shinriki, Yoshihito Miyakoshi, Yasuyuki Urabe, Hirokazu Yasutomi, Ryohei Aoyama, Tomoya Sasaki, Yoshitaka Nakajima, Masamichi
Copyright Year	2011
Abstract	Seasonal variations and reaction norms for vertebral number (V $_{N}$) in response to incubation water temperature were estimated in adult and juvenile naturally spawning chum salmon Oncorhynchus keta. The mean V $_{N}$ of adults varied according to spawning time; the early-spawning population had higher V $_{N}$ values than the late-spawning population. Moreover, the mean V $_{N}$ values in the early-spawning population decreased with seasonal changes, whereas V $_{N}$ values in the late-spawning population remained stable. Chum salmon embryos in three full-sib families were incubated at five different temperatures until hatching, and the V $_{N}$ values of the resulting juveniles were analyzed. The V $_{N}$ reaction norm to incubation water temperature showed a V-shaped curve that was lowest at an intermediate temperature. The mean V $_{N}$ at the same incubation temperature varied among the three families. These results suggest that V $_{N}$ values in chum salmon are influenced by genetic components and incubation water temperatures. V $_{N}$ may be a useful parameter for estimating the environmental conditions during ontogenesis and the genetic background by detecting population changes.
Starting Page	799
Ending Page	807
Page Count	9
File Format	PDF
ISSN	09199268
Journal	Fisheries Science
Volume Number	77
Issue Number	5
e-ISSN	14442906
Language	English
Publisher	Springer Japan
Publisher Date	2011-08-05
Publisher Place	Japan
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Incubation water temperature Naturally spawning chum salmon Seasonal variation Vertebral number Food Science Freshwater & Marine Ecology Fish & Wildlife Biology & Management
Content Type	Text
Resource Type	Article
Subject	Aquatic Science

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