Pelagic Cormoblant PhaJacrocorax pelagicus (see p. 275). 



9. Arctic Metabolic Economy of 

 Warm-blooded Animals 



WITH SUPPLIES SHIPPED from outside, a foreigner to the Arctic can 

 afford to eat as much food for fuel as his metabolic process can 

 handle, but an indigenous people must maintain a culture, a society, 

 and families on food provided from local sources. Kecognition of the 

 large portion of man's schedule applied to other activities than feed- 

 ing should indicate to us the common necessity for animals also to 

 conserve their metabolic expenditures in order to have time in which 

 to maintain family and social systems, and we should therefore be 

 cautious about viewing the economy of animal heat in the arctic with 

 the thought that arctic animals can preserve their body temperature by 

 increasing their metabolic heat production much beyond the rates 

 normal for animals in other climates. 



331 



