Diet of Cape Petrel<i>Daption capense</i>Chicks on South Shetland Islands, Antarctica

Soave, Guillermo E.; Coria, Néstor Rubén; Silva, Patrı́cia; Montalti, Diego; Favero, Marco

doi:10.3161/068.035.0212

Cited by 4 publications

(3 citation statements)

References 7 publications

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“…In the Atlantic sector of the Southern Ocean, seabirds and seals consume about 250 000 tonnes of myctophids (mainly E. carlsbergi and K. anderssoni) annually (CCAMLR 1991). In the southern Scotia Arc, myctophids (mainly E. antarctica) constitute an important item in the diet of flying birds such as cape petrels Daption capense (Casaux et al 1998c, Soave et al 2000, blackbellied stormpetrel Fregetta tropica (Hahn 1998), snow petrels Pagodroma nivea (Ferretti et al 2001) and south polar skuas Catharacta maccormicki (Montalti et al 1996). Around the South Orkney Islands (Daneri & Coria 1993), the South Shetland Islands (Daneri 1996, Daneri & Carlini 1999 and Heard Island (Green et al 1989(Green et al , 1991 Antarctic fur seals feed mainly on myctophids, while krill is their main prey at South Georgia (Reid & Arnould 1996, Iverson et al 1997.…”

Section: Offshorementioning

confidence: 99%

The role of fish in the Antarctic marine food web: differences between inshore and offshore waters in the southern Scotia Arc and west Antarctic Peninsula

Barrera-Oro

2002

Antartic science

146

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Abstract:The role of fish in the Antarctic food web in inshore and offshore waters is analysed, taking as an example the coastal marine communities of the southern Scotia Arc (South Orkney Islands and South Shetland Islands) and the west Antarctic Peninsula. Inshore, the ecological role of demersal fish is more important than that of krill. There, demersal fish are major consumers of benthos and also feed on zooplankton (mainly krill in summer). They are links between lower and upper levels of the food web and are common prey of other fish, birds and seals. Offshore, demersal fish depend less on benthos and feed more on zooplankton (mainly krill) and nekton, and are less accessible as prey of birds and seals. There, pelagic fish (especially lantern fish) are more abundant than inshore and play an important role in the energy flow from macrozooplankton to higher trophic levels (seabirds and seals). Through the higher fish predators, energy is transferred to land in the form of fish remains, pellets (birds), regurgitation and faeces (birds and seals). However, in the general context of the Antarctic marine ecosystem, krill (Euphausia superba) plays the central role in the food web because it is the main food source in terms of biomass for most of the high level predators from demersal fish up to whales. This has no obvious equivalent in other marine ecosystems. In Antarctic offshore coastal and oceanic waters the greatest proportion of energy from the ecosystem is transferred to land directly through krill consumers, such as flying birds, penguins, and seals. Beside krill, the populations of fish in the Antarctic Ocean are the second most important element for higher predators, in particular the energy-rich pelagic Myctophidae in open waters and the pelagic Antarctic silver fish (Pleuragramma antarcticum) in the high Antarctic zone. Although the occurrence of these pelagic fish inshore has been poorly documented, their abundance in neritic waters could be higher than previously believed.

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Section: Offshorementioning

confidence: 99%

The role of fish in the Antarctic marine food web: differences between inshore and offshore waters in the southern Scotia Arc and west Antarctic Peninsula

Barrera-Oro

2002

Antartic science

146

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“…The cape petrel is an opportunistic surface feeder (Soave et al 2000a). Its diet consists mainly of Antarctic silverfish (Pleuragramma antarctica), myctophids, Antarctic krill (Euphausia superba) and, in a smaller proportion, of amphipods (Arnould and Whitehead 1991;Coria et al 1997;Casaux et al 1998).…”

Section: Discussionmentioning

confidence: 99%

“…Its diet consists mainly of Antarctic silverfish (Pleuragramma antarctica), myctophids, Antarctic krill (Euphausia superba) and, in a smaller proportion, of amphipods (Arnould and Whitehead 1991;Coria et al 1997;Casaux et al 1998). The species composition of the diet, and the proportions of these species, differ considerably between seasons and breeding areas and seem, generally, to reflect prey availability (Coria et al 1996;Casaux et al 1998;Soave et al 2000a). The current decline in the cape petrel population on the Fildes Peninsula is not matched by declines in populations of other seabird populations in the area, namely Adélie penguin (Pygoscelis adeliae), chinstrap penguin (Pygoscelis antarcticus), gentoo penguin (Pygoscelis papua), southern giant petrel, and kelp gull (Braun et al 2020).…”

Section: Discussionmentioning

confidence: 99%

Population decline of the cape petrel (Daption capense) on King George Island, South Shetland Islands, Antarctica

Braun

Esefeld

Savelieva³

et al. 2021

Polar Biol

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The Antarctic and the surrounding Southern Ocean are currently subject to rapid environmental changes and increasing anthropogenic impacts. Seabird populations often reflect those changes and so act as indicators of environmental variability. Their population trends may provide information on a variety of environmental parameters on the scale of years or decades. We therefore provide long-term data on the cape petrel (Daption capense) population from a long-term monitoring program on Fildes Peninsula, South Shetland Islands, Maritime Antarctic, an area of considerable human activity. Our data, covering a period of 36 years, indicate some variability, but no clear trend in the number of breeding pairs between the breeding seasons 1985 and 2006. However, beginning in the 2008 season, the population decreased significantly and reached a minimum in the 2020 season. The mean annual decrease between 2008 and 2020 was 10.6%. We discuss possible causes of this strong negative population trend. Anthropogenic disturbance only affects a few breeding sites in the area and is therefore unable, on its own, to explain the consistent population decline at all the breeding sites studied. We think it more likely that reduced food availability was the main cause of the drastic decline in the cape petrel population.

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Long-term dataset reveals declines in breeding success and high fluctuations in the number of breeding pairs in two skua species breeding on King George Island

et al. 2015

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Diet of Cape PetrelDaption capenseChicks on South Shetland Islands, Antarctica

Cited by 4 publications

References 7 publications

The role of fish in the Antarctic marine food web: differences between inshore and offshore waters in the southern Scotia Arc and west Antarctic Peninsula

The role of fish in the Antarctic marine food web: differences between inshore and offshore waters in the southern Scotia Arc and west Antarctic Peninsula

Population decline of the cape petrel (Daption capense) on King George Island, South Shetland Islands, Antarctica

Long-term dataset reveals declines in breeding success and high fluctuations in the number of breeding pairs in two skua species breeding on King George Island

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