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<p>The western Antarctic Peninsula is characterized by pronounced climate variability and a high concentration of human activities, including tourism and fishing. The Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR), the body responsible for the conservation of Antarctic marine ecosystems and for regulating fisheries south of the Antarctic Convergence, considers <i>Pygoscelis</i> penguins to be key ecosystem indicator species. In this study, we used stomach content analysis and tracking data to examine diet composition and foraging parameters of chinstrap (<i>Pygoscelis antarcticus</i>) and gentoo (<i>Pygoscelis papua</i>) penguins breeding in two colonies at Cierva Cove, Gerlache Strait (64°08′ S, 60°59′ W and 64°10′ S, 60°56′ W, respectively). Our aim was to identify their main prey and the areas they use during foraging trips in the chick-rearing period of the 2024/25 breeding season. Antarctic krill (<i>Euphausia superba</i>) dominated the diet of both species; however, chinstrap penguins consumed smaller krill than gentoo penguins. Tracking data showed that both species foraged in coastal areas, with chinstrap penguins undertaking shorter trips, both distance and duration than their congeners. This study provides updated, spatially explicit ecological information to support management and conservation in the Gerlache Strait, a region increasingly pressured by krill fisheries.</p>

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No need to travel far, krill takeaway: Pygoscelid penguins as ecological indicators through foraging trip distribution and diet in Danco Coast

  • 期刊论文

  • 发表日期：

    2026年5月19日

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  • Mauro G. Rozas Sia,
  • Antonella Farace Rey,
  • Álvaro Soutullo,
  • Ana L. Machado-Gaye,
  • Javier Negrete,
  • M. Mercedes Santos,
  • Mariana A. Juáres

摘要

The western Antarctic Peninsula is characterized by pronounced climate variability and a high concentration of human activities, including tourism and fishing. The Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR), the body responsible for the conservation of Antarctic marine ecosystems and for regulating fisheries south of the Antarctic Convergence, considers Pygoscelis penguins to be key ecosystem indicator species. In this study, we used stomach content analysis and tracking data to examine diet composition and foraging parameters of chinstrap (Pygoscelis antarcticus) and gentoo (Pygoscelis papua) penguins breeding in two colonies at Cierva Cove, Gerlache Strait (64°08′ S, 60°59′ W and 64°10′ S, 60°56′ W, respectively). Our aim was to identify their main prey and the areas they use during foraging trips in the chick-rearing period of the 2024/25 breeding season. Antarctic krill (Euphausia superba) dominated the diet of both species; however, chinstrap penguins consumed smaller krill than gentoo penguins. Tracking data showed that both species foraged in coastal areas, with chinstrap penguins undertaking shorter trips, both distance and duration than their congeners. This study provides updated, spatially explicit ecological information to support management and conservation in the Gerlache Strait, a region increasingly pressured by krill fisheries.