INVESTIGADORES
CASAUX Ricardo Jorge
artículos
Título:
Fish in the diet of the Antarctic Shag Phalacrocorax atriceps at Laurie Island, South Orkney Islands.
Autor/es:
CASAUX R.; CORIA N.; BARRERA-ORO E.
Revista:
POLAR BIOLOGY
Editorial:
SPRINGER
Referencias:
Lugar: Berlin; Año: 1997 vol. 18 p. 219 - 222
ISSN:
0722-4060
Resumen:
Abstract
The
analysis of twenty nine stomach contents collected in a colony close to Pirie
Peninsula, South Orkney Islands, from 2 January to 18 February 1995, showed
that fish were by far the main prey of the Antarctic Shag Phalacrocorax bransfieldensis, followed by octopods, decapods and
gammarids. The fish Notothenia coriiceps constituted the bulk of the diet;
however, its importance decreased by the end of the study when Nototheniops nudifrons was the most important prey. The
composition of the stomach contents varied throughout the breeding season
according to changes in the chicks' energetic demands; as chicks grow older the
adults increased the mass of the loads carried to the nests preying on larger
fish, a phenomenon also observed at the South Shetland Islands.