. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. OXYGEN CONSUMPTION IN GILLICHTHYS 221 100 70 V. O X. o 40 o 20. \o 10 17 24 TEMPERATURE °C 31 FIGURE 6. Influence of cold- and warm-acclimation on metabolic responses of Gillichthys mirabilis to temperature changes. Each point represents the mean rate of oxygen consumption for ten fish, weighing from 4 to 10 grams. Individual rates were adjusted to the 8-gram inter- cept using the appropriate values of b listed under 10° and 24° in Table I; the procedure is discussed in Roberts (1957). Acclimation to 10°:
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. OXYGEN CONSUMPTION IN GILLICHTHYS 221 100 70 V. O X. o 40 o 20. \o 10 17 24 TEMPERATURE °C 31 FIGURE 6. Influence of cold- and warm-acclimation on metabolic responses of Gillichthys mirabilis to temperature changes. Each point represents the mean rate of oxygen consumption for ten fish, weighing from 4 to 10 grams. Individual rates were adjusted to the 8-gram inter- cept using the appropriate values of b listed under 10° and 24° in Table I; the procedure is discussed in Roberts (1957). Acclimation to 10°: circle = San Francisco population, triangle = Los Peiiasquitos population, square = Salton Sea population. Acclimation to 24° : X = San Francisco population. 6 would be classified in the system proposed by Prosser (1958) as Type III B. rotation counter-clockwise with cold acclimation. Clockwise rotation evidently is more common than counter-clockwise (Prosser, 1958). The curves for warm- and cold-acclimated fish intersect between 17° and °. The curve (not shown) for the warm-acclimated fish from Los Penasquitos intersects the curves for cold- acclimated animals at °. Evidently little or no translation is involved. This would be more apparent if the warm-acclimated fish had been tested over a lower temperature range. In- cidentally, above 34° the oxygen uptake in many of the 24°-acclimated fish decreases, and between 35° and 37° many die (further experiments not reported here). Influence of size on temperature coefficients There was no apparent difference in Q10 between large and small G. mirabilis for acute temperature changes. But the temperature coefficients after acclimation were influenced greatly by the size of the fish involved. The chronic Q10's were strikingly higher in the smaller fish (Table III; Figs. 2 to 4). Apparently acclima- tion was more effective in larger fish. The 50-gram fish, acclimated to 24° and tested at 31°, commonly had lower re
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
