Effect of temperature on isotonic twitch of white muscle and predicted maximum swimming speeds of skipjack tuna,Katsuwonus pelamis |
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| Authors: | Richard W. Brill Andrew E. Dizon |
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| Affiliation: | (1) Department of Physiology, University of Hawaii, Honolulu, Hawaii, 96822, U.S.A.;(2) Southwest Fisheries Center, National Marine Fisheries Service, NOAA, Honolulu, Hawaii, 96812, U.S.A.;(3) Present address: Department of Zoology, The University of British Columbia, 2075 Wesbrook Mall, Vancouver, British Columbia, V6T IW5, Canada |
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| Abstract: | Synopsis Latent period, rise time, contraction time, and half relaxation time from isotonic contractions of isolated white muscle samples from skipjack tuna, Katsuwonus pelamis, were determined at 20°, 27°, and 34° C. These parameters were found to be inversely proportional to temperature (Q10 = 1.47, 1.67, 1.62, and 1.72, respectively). The data show that contraction time and the effect of temperature on contraction time of skipjack tuna white muscle are not unique when compared to other equal-sized teleosts. Based on contraction time, maximum swimming speeds at each muscle temperature were calculated and found not significantly to exceed the maximum speeds of other equal-sized teleosts, when comparisons are made at the same white muscle temperatures |
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| Keywords: | White muscle contraction time swimming speed skipjack tuna Katsuwonus pelamis |
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