Data/hora: 09/06/2024 01:59:57

Provedor de dados: 	97	
País: 	Chile	
Título: 	Cell size and basal metabolic rate in hummingbirds	
Autores: 	Opazo,Juan C.; Soto-Gamboa,Mauricio; Fernández,Maria José.	
Data: 	2005-01-01	
Ano: 	2005	
Palavras-chave: 	Hummingbirds; Nucleotypic theory; Basal metabolic rate; Mean corpuscular volume.	
Resumo: 	Nucleotypic theory suggests that genome size play indirect roles in determining organismal fitness. Among endotherms this theory has been demonstrated by an inverse correlation between basal metabolic rate (BMR) and genome size. Nonetheless, accumulation of variables, especially for some key groups of endotherms, involved in C-value enigma (e.g., cell size) will fortify this theory. In this sense, hummingbird species are of particular interest because they are an energetic extreme in avian and endotherm evolution. Knowing that cell size is proportional to C-value, in this study we tested for a relationship between mean corpuscular volume of red blood cells and BMR in four species of hummingbirds ranging from 4 to 20 g. In comparison with other birds, our hummingbird data show higher BMR and the smallest mean corpuscular volumes, thereby providing further support for the nucleotypic theory	
Tipo: 	Journal article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2005000200010	
Editor: 	Sociedad de Biología de Chile	
Formato: 	text/html	
Fonte: 	Revista chilena de historia natural  v.78 n.2 2005