The Diet of the Imperial Shag Phalacrocorax atriceps at Vintter Lake, Patagonia, Argentina

CASAUX R.; GARCÍA BETOÑO M. INÉS; SILVESTRO A.; JUÁRES M.

WATERBIRDS (DE LEON SPRINGS, FLA.)

WATERBIRD SOC

Año: 2022

1524-4695

ABSTRACT.-The diet of the Imperial Shag (Phalacrocoraxatriceps) at Vintter Lake,Patagonia, Argentina, was studied by the analysis of 157 pellets collected during the summerseasons 2008-2010 and 2016-2017.. The native fish Galaxias platei was the main prey throughout the study period, onlyaccompanied by few gastropods (in 2010) and coleopterans (in 2009 and 2016). Ourresults markedly differ from those previously reported for Imperial shags breedingat Vintter Lake and other sites. The results are discussed in relation to thepopulation decline observed in shags at Vintter Lake throughout the studyperiod.