Osmoregulatory responses to dietary protein and water intake in the granivorous Zonotrichia capensis (Passerine, Emberizidae)

Aldea, P.; Sabat P.

Abstract

"We studied the osmoregulatory responses of the granivore Zonotrichia capensis, acclimated to high- and low-protein diets as well as two levels of water intake. We tested whether Z. capensis has the ability to modify the proportion of nitrogenous waste in the excreta when protein intake and water intake varies. After 21 days of acclimation, plasma osmolality was not significantly affected by dietary treatment; however, excreta osmolality was higher in the high-protein group compared to the low-protein group. Nitrogenous wastes in Z. capensis are excreted mainly in the form of uric acid. The proportion of kidney devoted to medullary tissue was 40 % higher in dehydrated birds than in hydrated birds. Excreta osmolality was higher in dehydrated birds, and in all cases higher than plasma concentration by more than 300 mOsm kg""

Más información

Título según WOS: Osmoregulatory responses to dietary protein and water intake in the granivorous Zonotrichia capensis (Passerine, Emberizidae)
Título según SCOPUS: Osmoregulatory responses to dietary protein and water intake in the granivorous Zonotrichia capensis (Passerine, Emberizidae)
Título según SCIELO: Osmoregulatory responses to dietary protein and water intake in the granivorous Zonotrichia capensis (Passerine, Emberizidae)
Título de la Revista: Revista chilena de historia natural
Volumen: 80
Asunto: 4
Editorial: Sociedad de Biología de Chile
Fecha de publicación: 2007-01-01
Página de inicio: 447
Página final: 454
Idioma: English
DOI/URL:

10.4067/S0716-078X2007000400006

Identificador: 10.4067/S0716-078X2007000400006
Notas: ISI, SCIELO, SCOPUS