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Table 1.

Composition of femur and auditory capsule of the leopard frog Rana pipiens

					Composition (mmol kg⁻¹ ash)
Tissue	Water (%)	Organic (%)	Ash (%)	CO₃²⁻ (mmol kg⁻¹ dry tissue)	P_i	Ca²⁺	Mg²⁺	Na⁺	K⁺
Femur	54.3±0.1^{^*}	25.5±0.1^{^*}	20.2±0.1^{^*}	533±24^{^*}	6192±44^{^*}	9900±99^{^*}	288±4^{^*}	483±17	36.7±4.1^{^*}
Auditory capsule	70.0±0.1	18.3±0.1	11.7±0.1	1398±156	5256±132	10764±105	256±6	453±42	62.4±6.3

					Composition (mmol kg⁻¹ ash)
Tissue	Water (%)	Organic (%)	Ash (%)	CO₃²⁻ (mmol kg⁻¹ dry tissue)	P_i	Ca²⁺	Mg²⁺	Na⁺	K⁺
Femur	54.3±0.1^{^*}	25.5±0.1^{^*}	20.2±0.1^{^*}	533±24^{^*}	6192±44^{^*}	9900±99^{^*}	288±4^{^*}	483±17	36.7±4.1^{^*}
Auditory capsule	70.0±0.1	18.3±0.1	11.7±0.1	1398±156	5256±132	10764±105	256±6	453±42	62.4±6.3

Values are means ± s.e.m.(N=5 for each tissue).

Significant difference between the two tissues (P<0.05, t-test).