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Individual foraging specialization and sexual niche segregation in South American fur seals
(Springer, 2019-01)
Individual variation in habitat and resource use has been reported for many top predators. This variation becomes important when comparing individuals taking into account sex, size, or age classes, since it can influence ...
Effects of glacial influence on trophic function of benthic fauna in tropical high-Andean streams
(Pontificia Universidad Católica del Ecuador, 2014)
Glacial-fed stream features affect macroinvertebrate communities in both temperate and tropical streams. Alpine glacier-fed stream food chain present specific features, yet nothing is known about the organization of trophic ...
Intraspecific variability in isotopic composition of a monomorphic seabird, the Common Tern ( Sterna hirundo ), at wintering grounds
(Csiro Publishing, 2019-04)
Understanding sex differences in foraging behaviour has important implications for breeding biology and population ecology. This requires the evaluation of segregation throughout the annual cycle, including the non-breeding ...
The biggest or the most abundant? Predation of the black drum pogonias cromis (perciformes, sciaenidae) on benthic organisms in Southern Brazil
(2019-01-01)
Predators that consume larger prey acquire a greater net return of energy per individual, even though they are less abundant. The objective of this work is to analyze the feeding biology of Pogonias cromis in southern ...
Environmental niche overlap between common and dusky dolphins in North Patagonia, Argentina
(Public Library of Science, 2015-06)
Research on the ecology of sympatric dolphins has increased worldwide in recent decades. However, many dolphin associations such as that between common dolphins (Delphinus delphis) and dusky dolphins (Lagenorhynchus obscurus) ...
Trophic ecology of detritivorous fish along a reservoir cascade in a tropical semi-arid region
(2021-04-01)
The objectives of this study were to investigate the food resources consumed by two species of detritivorous fishes along the Apodi-Mossoró River reservoir cascade system, located in the tropical semi-arid region of Brazil. ...
Feeding ecology and niche segregation of the spider crab Libinia ferreirae (Decapoda, Brachyura, Majoidea), a symbiont of Lychnorhiza lucerna (Cnidaria, Scyphozoa, Rhizostomeae)
(Springer, 2019-12-20)
Feeding strategies provide essential information to help understand symbiotic relationships and resource competition as well as environmental integrity. This study examined the feeding ecology of the spider crab Libinia ...
Breeding season diet of Scarlet Ibises and Little Blue Herons in a Brazilian mangrove swamp
(Waterbird Soc, 2001-01-01)
We studied the diet composition and overlap of Scarlet Ibises (Eudocimus ruber) and Little Blue Herons (Egretta caerulea in a mangrove swamp in southeast Brazil during the 1996-1997 breeding season, which occurs during the ...
Trophic niche overlap among scavengers in Patagonia supports the condor-vulture competition hypothesis
(Cambridge University Press, 2017-11-16)
Animals that share resources tend to use different foraging strategies in order to decrease potential competition. Scavenging birds using the same nutritional resources can segregate into different space and time scales. ...