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Abstract

In the region of the Admiralty Bay 12 nesting bird species were encountered of a total abundance of 40890 pairs and biomass amounting to about 395000 kg Three penguin species constituted 91.7% in abundance, their biomass constituting 98.7% of the whole community. Densities of abundance and biomass of adult birds in relation to the living area of penguins (i.e. 775 km2) ranged from 32.3 to 121.4 indiv. km-2 and from 115.1 to 4730 kg k m-2.
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Abstract

Observations were carried out in Penguin Island on 27 January 1979. The results of the birds census were as follows: Pygoscelis adeliae— 1710 pairs, P. antarclica— 7058 pairs, Macronecles giganteus—512 pairs, Oceanites oceanicus — 47 pairs, Chionis alba — 5, Stercorarius skua lonnbergi — 6 pairs, Larus dominicanus — 63 pairs, Sterna vittata—18. Other species showed different requirements as regards breeding grounds. Simultaneously the following Pinnipedia were observed on Penguin Island: Mirounga leonina — 202 specimens, Arctocephalus gazella — 48 adult and 6 young individuals, Leptonychotes weddelli — 2, Lobodon carcinophagus — 1.
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