. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 168 F. JOHN VERNBERG Metabolic rates oj tropical and temperate zone Uca Table I represents the rates of oxygen consumption of seven species of fiddler crabs from the tropical and temperate zones determined at different temperatures. Although an increase in temperature generally resulted in a higher rate of oxygen uptake, there appear to be certain thermal ranges within which the metabolic rate is little influenced. A specific example can be seen for U. in that the rate of oxygen consumption at 7° and 12° is similar,
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 168 F. JOHN VERNBERG Metabolic rates oj tropical and temperate zone Uca Table I represents the rates of oxygen consumption of seven species of fiddler crabs from the tropical and temperate zones determined at different temperatures. Although an increase in temperature generally resulted in a higher rate of oxygen uptake, there appear to be certain thermal ranges within which the metabolic rate is little influenced. A specific example can be seen for U. in that the rate of oxygen consumption at 7° and 12° is similar, but a sharp increase followed when determined at 17°. Throughout the temperature range of 12°—17° (determinations made at 12°, 15°, and 17°), U. pugilator and U. minax consumed oxygen at about the same rate (Fig. 2). This phenomenon was observed at higher temperature ranges as well for these temperate zone animals; for example, a five-degree in- crease from 28°-33° only slightly increased the metabolic rate of U. This apparent "staircase" effect was noted for tropical animals also, but only at the intermediate and higher temperature levels (Fig. 3). Changes in the rate of oxygen consumption are expressed as Q10, according to Van't Hoff's equation, rather than the heat of activation (u) of Arrhenius. Q10 values for these seven species found in Table II further help to illustrate this "staircase" phenomenon. If determinations had been made only at larger thermal , UJ 5 z o U c? I) u .9 .8 .7 .6 . .4 . . . -UCA O—O-UCA X—X-UCA PUGNAX MINAX PUGILATOR I I I 10 13 16 19 22 25 28 31 34 TEMPERATURE —CENTIGRADE 37 40 FIGURE 2. The influence of temperature on the rate of oxygen consumption of three species of Uca from North Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not
Size: 1765px × 1416px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
