. Asiatic herpetological research. Reptiles -- Asia Periodicals; Amphibians -- Asia Periodicals. 1997 Asiatic Herpetological Research Vol. 7, p. 149 H ^ .C 6) I C o Q. E D) O 004H 0 k â¢*â T. septentrionalis G. japonicus. âi- 10 20 âI- 30 40 60 âI- 70 50 60 70 80 Percentage of incubation period 90 100 Figure 1. Relationship between oxygen consumption of eggs in two species of lizards (Takydromus septentrionalis and Gekko japonicus) and the percentage of incubation period at 32 C. Squares (T. septentrionalis) and circles (Gekko japonicus) represent mean values of
. Asiatic herpetological research. Reptiles -- Asia Periodicals; Amphibians -- Asia Periodicals. 1997 Asiatic Herpetological Research Vol. 7, p. 149 H ^ .C 6) I C o Q. E D) O 004H 0 k â¢*â T. septentrionalis G. japonicus. âi- 10 20 âI- 30 40 60 âI- 70 50 60 70 80 Percentage of incubation period 90 100 Figure 1. Relationship between oxygen consumption of eggs in two species of lizards (Takydromus septentrionalis and Gekko japonicus) and the percentage of incubation period at 32 C. Squares (T. septentrionalis) and circles (Gekko japonicus) represent mean values of oxygen consumption of eggs. Vertical lines indicate two standard deviations about the mean. The dashed lines indicate normalization curves of oxygen consumption per egg at dif- ferent stages of incubation. nation time in Fig. 1. The following semi-logarithmic regression equations are best fitted by those data. These equations are of the general form: log V= a + bT ± c, where V is oxygen consumption in ml 02/eggs * h, and T is time in days. For G. japonicus: log V = + ± (r= P<). For T. septentrionalis: log V = + ± (r=, P<). The slopes (b) of the regression equations of the two species lizards are nearly the same (b= and b=). The two species had the same general pat- terns of exponential embryonic metabolic ontogeny as that usually observed in other squamate reptiles (Dim'el, 1970; Black. 1984) and in altricial birds ( 1979). Embryonic metabolic rates of T. septentrionalis on the first and second days of incubation averaged 179 ml 02g * h and ml 02/g * h for per gram mass egg respectively. Oxygen consumption of eggs of G. japonicus could not be detected until about the fourth day of incubation (12% of the incubation period). The average total oxygen consumed during embryonic ontogeny was ml On/egg or ml 02/g per gram mass of initial egg mass, or m
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