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Euphausia-Superba Abundance; Breeding Adelie Penguins; South Georgia; Seasonal Variability; Continental-Shelf; Submarine-Canyon; Elephant Island; Grazing Impact; Fur Seals; Behavior
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Full-Text Articles in Life Sciences
Krill Biomass And Aggregation Structure In Relation To Tidal Cycle In A Penguin Foraging Region Off The Western Antarctic Peninsula, Ks Bernard, Deborah K. Steinberg
Krill Biomass And Aggregation Structure In Relation To Tidal Cycle In A Penguin Foraging Region Off The Western Antarctic Peninsula, Ks Bernard, Deborah K. Steinberg
VIMS Articles
Antarctic krill are a key component of the diet of Adlie penguins inhabiting the Western Antarctic Peninsula (WAP), yet our understanding of the variability of krill distribution patterns within nearshore penguin feeding grounds is limited. A recent study of the foraging patterns of penguins breeding in the northern WAP suggests that tidal phase plays a role in foraging distance. We used acoustics to examine biomass and aggregation structure of krill in the penguin foraging grounds off Palmer Station during diurnal and semi-diurnal tides. Nearshore, integrated krill biomass during diurnal tides was significantly higher than during semi-diurnal tides. Krill aggregations were …