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- Title
Trophic Ecology of Pristimantis labiosus (Anura: Craugastoridae) from South-Western Colombia.
- Authors
GUTIÉRREZ-CÁRDENAS, Paul David Alfonso; CASTILLO, Karen; MARTÍNEZ, Diego; ROCHA, Carlos Frederico Duarte; ROJAS-RIVERA, María Alejandra
- Abstract
To date, the diet of the frog Pristimantis labiosus is not known. We analysed the feeding habits of adults and juveniles of this species and evaluated wh ether dietary shift was related to variation in body and/or mouth size. Diet was analysed in terms of nu mber, volume and frequency of occurrence of items. Both length and volume of prey were correlated with sn out-vent length, and mouth width to identify if there was ontogenetic shift in prey size consumption with the increase in body and head size. The diet was composed of 18 taxa of arthropods and gastropods distributed in 217 items. Adult frogs consumed a greater number of food items (N = 139) than juveniles (N = 78), and the two age-classes co nsumed a similar array of prey taxa. The most frequent prey in adults was Form icidae (60%), whereas in juveniles the most frequent prey taxa were Diptera and Hemiptera (13% each). Adults had a broader trophic niche (0.57) than juveniles (0.08) with a relatively low trophic overlap among them (0.39). Although we found differences in body size and in mouth width between the two age-classes, we did not observe a corresponding ontogenetic shift in prey size consumption with the increase of mo rphological variables. Based on these results, P. labiosus is considered opportunistic widely-foraging predator, consuming any type of prey available in the environment.
- Subjects
FROGS; ONTOGENY
- Publication
North-Western Journal of Zoology, 2016, Vol 12, Issue 1, p102
- ISSN
1584-9074
- Publication type
Article