Please use this identifier to cite or link to this item:
Title: Effects of prey size and foraging mode on the ontogenetic change in feeding niche of Colostethus stepheni (Anura: Dendrobatidae)
Authors: Lima, Albertina Pimental
Moreira, Glória
Keywords: Anura
Prey Size Selection
Colostethus Stepheni
Issue Date: 1993
metadata.dc.publisher.journal: Oecologia
metadata.dc.relation.ispartof: Volume 95, Número 1, Pags. 93-102
Abstract: The feeding niche of Colostethus stepheni changes during ontogeny. Small individuals eat small arthropods, principally mites and collembolans, and larger frogs eat bigger prey of other types. The shift in prey types is not a passive effect of selection for bigger prey. There is a strong relationship between electivity for prey types and frog size, independent of electivity for prey size. Four indices of general activity during foraging (number of movements, velocity, total area utilized and time spent moving), which are associated with electivity for prey types in adult frogs and lizards, did not predict the ontogenetic change in the diet of C. stepheni. Apparently, the behavioral changes that cause the ontogenetic change in C. stepheni are more subtle than shifts in general activity during foraging. Studies of niche partitioning in communities of anurans that do not take into consideration ontogenetic changes in diet and seasonal changes in the size structures of populations present a partial and possibly erroneous picture of the potential interactions among species. © 1993 Springer-Verlag.
metadata.dc.identifier.doi: 10.1007/BF00649512
Appears in Collections:Artigos

Files in This Item:
There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.