SciELO - Scientific Electronic Library Online

vol.18 issue1Parental care in the Vermilion Flycatcher (Pyrocephalus rubinus): relative contribution of male and femaleDiet of the Red-backed Hawk (Buteo polyosoma) in a forested area of the Chilean Patagonia and its relation to the abundance of rodent prey author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




  • Have no cited articlesCited by SciELO

Related links


El hornero

Print version ISSN 0073-3407On-line version ISSN 1850-4884


BERTELLOTTI, Marcelo; PAGNONI, Gustavo  and  YORIO, Pablo. Feeding behavior of the Kelp Gull (Larus dominicanus) during the non-breeding season at sandy beaches of Península Valdés, Argentina. Hornero [online]. 2003, vol.18, n.1, pp.37-42. ISSN 0073-3407.

Birds that feed in intertidal areas exploit resources that often are distributed in patches, and which become available during regular intervals that depend on the tidal cycle. The quality of foraging patches depends on prey species composition, prey density, prey size distribution, and prey availability to predators. We analyzed the feeding behaviour of Kelp Gulls (Larus dominicanus) on intertidal sectors with different densities and sizes of prey on a sandy beach at Península Valdés, Chubut Province, Argentina. Gulls fed along the tide line by foot paddling, and their diet was mostly composed of sand burrowing clams, Tellina petitiana and Darina solenoides. Average sizes of both clams identified in Kelp Gull pellets were larger than those found in beach sediments. Feeding activity was concentrated in areas of high clam density and with larger sizes of both clam species. Even though Kelp Gulls are foraging generalists that use a wide spectrum of food items, these results show that they can also be selective in their choice of prey.

Keywords : Argentina; diet; foraging; Kelp Gull; Larus dominicanus; non-breeding season.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License