NDLI: Thermal tolerance of a rainbow trout Oncorhynchus mykiss strain selected by high-temperature breeding

Content Provider	Springer Nature Link
Author	Ineno, Toshinao Tsuchida, Shuji Kanda, Mikio Watabe, Shugo
Copyright Year	2005
Abstract	Thermal tolerance was studied in a rainbow trout strain successively selected through high temperature breeding at 20–27°C since 1966 in Miyazaki Prefecture, Japan. The hatching rate and fry mortality at high temperatures were examined in the selected strain along with normal strains cultured at water temperature of 9–17°C. The hatching rate of embryos fertilized at either 10 or 14°C and subsequently subjected to high temperatures in the blastula or neurula stage of the selected strain, was marginally higher than that of the normal strain counterparts. The upper 50% lethal temperatures (LT$_{50}$) for embryos in the early segmentation, blastula and neurula stages of the selected strain were also higher than those of the normal strain counterparts. Death temperatures and LT$_{50}$ of fries acclimated to 20°C of the selected strain were significantly higher than those of the normal strains. However, no difference in the critical thermal maximum was detected between the different strains. These results suggest that the selected strain of rainbow trout established by selecting successively for many generations at high temperatures acquired a degree of thermal tolerance.
Starting Page	767
Ending Page	775
Page Count	9
File Format	PDF
ISSN	09199268
Journal	Fisheries Science
Volume Number	71
Issue Number	4
e-ISSN	14442906
Language	English
Publisher	Springer-Verlag
Publisher Date	2005-01-01
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	embryonic development high temperature breeding upper 50% lethal temperatures Oncorhynchus mykiss rainbow trout thermal tolerance Fish & Wildlife Biology & Management Freshwater & Marine Ecology Food Science
Content Type	Text
Resource Type	Article
Subject	Aquatic Science

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