. Asiatic herpetological research. Reptiles -- Asia Periodicals; Amphibians -- Asia Periodicals. Vol. 6, p. 154 Asiatic Herpetological Research April 1995 TABLE 6. Equations relating VO2 (ml/g-'day"1) to incubation days, total VO2, and VO2 of peak during incubation to hatching in C. reevesii eggs. T- Before Peak After Peak Peak Total incub. in VO2 = a +b days r in VO2 = a +b days r O2 ml/g 28°C v°2 = + V02= 30°C VO2 = + V02= 33°C V02= + V02= ^
. Asiatic herpetological research. Reptiles -- Asia Periodicals; Amphibians -- Asia Periodicals. Vol. 6, p. 154 Asiatic Herpetological Research April 1995 TABLE 6. Equations relating VO2 (ml/g-'day"1) to incubation days, total VO2, and VO2 of peak during incubation to hatching in C. reevesii eggs. T- Before Peak After Peak Peak Total incub. in VO2 = a +b days r in VO2 = a +b days r O2 ml/g 28°C v°2 = + V02= 30°C VO2 = + V02= 33°C V02= + V02= ^ 2 •o bo s. 1 r 0 -1 1— 60 20 40 50 80 100 Incubation Period (%) FIG. 1. Relationship between oxygen consumption of eggs and percentage of incubation period in Chinemys reevesii. N=10), % (SD=, N=10) and (SD=, N=10) of pre- incubation egg mass, respectively. These values are , and less than the standard rates of substance contents inside eggs during pre-incubation eggs of C. reevesii (Table 5). Oxygen Consumption The pattern of change in oxygen consumption (V02) of C. reevesii eggs was similar at 28°C, 30°C and 33°C. The V02 increased approximately exponentially and peaked to 65% of incubation period at 33°C, to 70% of that at 30°C, and to 80% of that at 28°C, and then declined to the time of hatching (Fig. 1). Total amount of 02 consumed was calculated by integration of the equations (Table 6) over the interval from the first V02 measurement to the mean total incubation period at relevant temperature. The total V02 was mL/g at 28°C, mL/g at 30°C, and mL/g at 33°C. Discussion Length of Incubation Period and Thermal Constant Table 1 shows that the results of t-test for the average lengths of incubation period in C. reevesii eggs at 28°C, 30°C and 33°C exhibit the significant differences (P<). The average lengths of those decreased with incubation temperature increased. This may be a characte
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