Abstract
Abstract We studied the effects of sex, body size, and season on the diet of two populations of the Blue-Bellied Poison Frog Andinobates minutus (Anura: Dendrobatidae) along the Pacific coast of Colombia. Andinobates minutus had a specialist diet, with preference for Acari (mites), Formicidae (ants), Collembola (springtails), and Holometabolous larvae. No differences in diet composition were noted between populations or between seasons. However, prey volume was higher in frogs from Bahia Malaga than those from Isla La Palma, and both populations experienced a decrease in the number of prey items in November, caused possibly by the low prey availability in that month. A differential effect of body size on diet was noted between populations. The total volume of prey, the volume and number of ants, and the volume of mites increased with snout–vent length (SVL), whereas the number of springtails decreased with SVL only in the Bahia Malaga population but not in the Isla La Palma population. This differential e...
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