Artículos de revistas
Seasonal changes in digestive enzymes in five bird species
Fecha
2018Registro en:
Canadian Journal of Zoology, Volumen 96, Issue 7, 2018, Pages 707-712
14803283
00084301
10.1139/cjz-2017-0350
Autor
Ramírez Otarola, Natalia
Naya, Daniel E.
Sabat Kirkwood, Alejandro Pablo
Institución
Resumen
© Her Majesty the Queen in right of Canada 2018. Most animals must cope with seasonal fluctuations in environmental conditions, including variations in food availability and composition. Accordingly, it is expected that most species should exhibit reversible seasonal phenotypic adjustments in their physiology. Here, we assessed seasonal variation in the activity of three digestive enzymes (sucrase, maltase, and aminopeptidase-N) in one omniviorous bird species (Rufous-collared Sparrow (Zonotrichia capensis (P. L. Statius Müller, 1776))), three granivorous bird species (Black-chinned Siskin (Carduelis barbata (Molina, 1782)), Common Diuca Finch (Diuca diuca (Molina, 1782)), and Mourning Sierra Finch (Phrygilus fruticeti (Kittlitz, 1833))), and one insectivorous bird species (Plain-mantled Tit- Spinetail (Leptasthenura aegithaloides (Kittlitz, 1830))). Based on the adaptive modulation hypothesis, we predicted that the omnivorous species should exhibit the largest seasonal variation in th