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Table 1.

Estimates of ET₅₀, Hill constant(N) and cloacal discharge temperature(T_CD) from lizards breathing 21, 10 and 6%O₂

	ET₅₀	N	T_CD (°C)	No. of cloacal discharges^{^†}
21% O₂	36.9±0.2	69.8±11.0	36.1±0.6	1.8±0.2 (71.4)
Male	37.2±0.3	-	-	-
Female	36.6±0.4	-	-	-
10% O₂	35.5±0.4^*	78.4±10.8	34.4±0.8^*	1.5±0.3 (71.4)
Male	35.8±0.5	-	-	-
Female	35.0±0.6	-	-	-
6% O₂	34.3±0.4^*	113.4±15.6^*	33.2±0.4^*	3.4±0.4 (78.6)^*
Male	34.8±0.4	-	-	-
Female	33.6±0.6	-	-	-

	ET₅₀	N	T_CD (°C)	No. of cloacal discharges^{^†}
21% O₂	36.9±0.2	69.8±11.0	36.1±0.6	1.8±0.2 (71.4)
Male	37.2±0.3	-	-	-
Female	36.6±0.4	-	-	-
10% O₂	35.5±0.4^*	78.4±10.8	34.4±0.8^*	1.5±0.3 (71.4)
Male	35.8±0.5	-	-	-
Female	35.0±0.6	-	-	-
6% O₂	34.3±0.4^*	113.4±15.6^*	33.2±0.4^*	3.4±0.4 (78.6)^*
Male	34.8±0.4	-	-	-
Female	33.6±0.6	-	-	-

Values are means ± s.e.m. Mean male and female values are shown for those parameters in which there was a significant difference between sexes using repeated-measures ANOVA, with oxygen level and sex as factors.

Significant difference (P<0.05) from 21% O₂values.

†

Numbers in parentheses refer to the percentage of lizards exhibiting cloacal discharge.

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