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Temperature and oxygen tension influence the development of muscle cellularity in embryonic rainbow trout
Author(s) -
Matschak T. W.,
Hhopcroft T.,
Smason P.,
Crook A. R.,
Stickland N. C.
Publication year - 1998
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1998.tb01003.x
Subject(s) - rainbow trout , biology , hatching , zoology , anatomy , tension (geology) , oxygen tension , oxygen , biophysics , fish <actinopterygii> , materials science , fishery , chemistry , composite material , ultimate tensile strength , organic chemistry
Muscle cellularity at a developmental stage around the time of hatching was examined in rainbow trout which had been reared from the eyed stage at three different temperature regimes (5, 10 and 15° C) and different O 2 tensions [70% of air saturation value (ASV) at 5° C, 100% of ASV at all temperatures, and 150% of ASV at 10 and 15° C]. It was found that, as has been shown for other species, there was a difference in muscle fibre numbers and fibre cross‐sectional areas between some of the regimes. There was a decrease in fibre number at the intermediate and higher temperature, and a decrease in fibre size at the high temperature. The temperature effects observed were modified by the applied changes in O 2 tension. An increased O 2 tension at 10° C led to an increase in fibre size whereas a decrease in O 2 tension at the low temperature resulted in a decrease in fibre number. The largest total white muscle cross‐sectional area was achieved at 10° C under high O 2 conditions. Temperature and O 2 tension therefore had a clear effect on muscle cellularity and there was a significant interaction between the two parameters.