Translator Disclaimer
1 February 2009 Gut Size Variation Among Bufo spinulosus Populations Along an Altitudinal (and Dietary) Gradient
Daniel E. Naya, Claudio Veloso, Francisco Bozinovic
Author Affiliations +
Abstract

To date, digestive flexibility has been studied in dozens of vertebrate species. However, practically all of these works has ignored the importance of intraspecific physiological variability across populations inhabiting different habitats. Here, we compare the digestive tract gross morphology of three populations of the Andean toad (Bufo spinulosus), inhabiting along an altitudinal gradient and feeding on different food items. Results support a core prediction of digestive theory, i.e., intestinal length increases in parallel with the content of indigestible material in the natural diet. The present study suggest how variation in the abiotic environment associated with altitude (e.g., temperature, water availability, soil quality) can change biotic conditions (e.g., vegetation cover, prey availability), affect feeding behavior of individuals (e.g., width and composition of trophic niche), and, ultimately, individuals' digestive features (e.g., gut morphology).

© Finnish Zoological and Botanical Publishing Board 2009
Daniel E. Naya, Claudio Veloso, and Francisco Bozinovic "Gut Size Variation Among Bufo spinulosus Populations Along an Altitudinal (and Dietary) Gradient," Annales Zoologici Fennici 46(1), 16-20, (1 February 2009). https://doi.org/10.5735/086.046.0102
Received: 26 September 2007; Accepted: 1 March 2008; Published: 1 February 2009
JOURNAL ARTICLE
5 PAGES


Share
SHARE
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top