The Company of Biologists

Table 2.

Energy expenditure and milk consumption rates of Antarctic and subantarctic fur seal pups on Possession Island, Îles Crozet

	Antarctic fur seal (N=15)	Subantarctic fur seal (N=14)
Body mass (kg)	10.05±0.35	10.47±0.49
Age (days)	64±1	66±2
Total body lipid (%)	22.2±1.0^{^†},^{^‡}	26.1±1.0^{^†}
CO₂ production (ml g^-1 h^-1)	0.97±0.05^{^*}	0.81±0.05^{^*}
Daily energy expenditure (kJ kg^-1 day^-1)	638±33^{^*}	533±33^{^*}
O₂ consumption (ml g^-1 h^-1)	1.36±0.07^{^*}	1.14±0.07^{^*}
Total water influx (ml kg^-1 day^-1)	51.2±2.7^{^†}	40.7±3.5^{^†}
Metabolic water production (ml kg^-1 day^-1)	16.8±0.8^{^*}	14.0±0.9^{^*}
Milk water intake (ml kg^-1 day^-1)	34.4±3.0	26.2±3.9
Milk consumption (ml kg^-1 day^-1)	82.9±7.1	63.2±9.5
Milk consumption (ml bout^-1)	3879±260	3637±544

	Antarctic fur seal (N=15)	Subantarctic fur seal (N=14)
Body mass (kg)	10.05±0.35	10.47±0.49
Age (days)	64±1	66±2
Total body lipid (%)	22.2±1.0^{^†},^{^‡}	26.1±1.0^{^†}
CO₂ production (ml g^-1 h^-1)	0.97±0.05^{^*}	0.81±0.05^{^*}
Daily energy expenditure (kJ kg^-1 day^-1)	638±33^{^*}	533±33^{^*}
O₂ consumption (ml g^-1 h^-1)	1.36±0.07^{^*}	1.14±0.07^{^*}
Total water influx (ml kg^-1 day^-1)	51.2±2.7^{^†}	40.7±3.5^{^†}
Metabolic water production (ml kg^-1 day^-1)	16.8±0.8^{^*}	14.0±0.9^{^*}
Milk water intake (ml kg^-1 day^-1)	34.4±3.0	26.2±3.9
Milk consumption (ml kg^-1 day^-1)	82.9±7.1	63.2±9.5
Milk consumption (ml bout^-1)	3879±260	3637±544

and denote significant differences between the species at P<0.03 and P<0.02, respectively

denote significant differences between the species at P<0.03 and P<0.02, respectively

n=16 (see text for details)