Science and earth science

Polish Polar Research

Content

Polish Polar Research | 2000 | vol. 21 | No 3-4 |

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Abstract

Two species of Amphipoda (Hyperiidae), Themisto libellula (Mandt, 1822) and Themisto abyssorum (Boeck, 1870), were collected with the use of a WP-2 net from the area be­tween Nordkapp and Spitsbergen (73° to 78° N) in July of 1993,1996,1997 and 1998. Densities ranged from 6 to 992 ind. 100 m-3 (T. abyssorum) and from 8 to 448 ind. 100 m-3 (r. libellula) and respective total biomass of T. abyssorum from 65.6 to 81.2 mg d.w. 100 m-3 and T. libellula from 59.9 to 131.5 mg d.w. 100 m-3.

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Authors and Affiliations

Krzysztof Wencki
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Abstract

The checklist of Admiralty Bay polychaetes elaborated on the basis of historical and current data includes 120 benthic and 5 pelagic species. Admiralty Bay is the most intensively sampled area in the Antarctic, taking into account polychaete fauna, and the checklist of Polychaeta may be therefore considered as a rather comprehensive one. In the sublittoral soft bottom three dominant species: Leitoscoloplos kerguelensis, Tauberia gracilis and Ophelina syringopyge constitute almost 50% of all collected polychaetes (20%, 16% and 13% respectively). Rhodine intermedia, Tharyx cincinnatus, Aricidea (Acesta) strelzovi, Apistobranchus sp., Cirrophorus brevicirratus, Microspio moorei, Maldane sarsi antarctica, Aglaophamus ornatus and Asychis amphiglypta make up a group of species of considerable abundance (a further 30% of author's collection). The average abundance of polychaetes of the sublittoral soft bottom was estimated at 120 individuals per 0.1 m2, with the observed maximum 390 individuals per 0.1 m2.

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Authors and Affiliations

Jacek Siciński
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Abstract

This paper presents some preliminary data on the quantitative distribution of Tanaidacea in Admiralty Bay, mainly in its Ezcurra Inlet. On the soft bottom of this inlet, and especially its small glacial lagoon, Herve Cove, the highest abundance but the lowest species richness of Tanaidacea was found. In the central basin of Admiralty Bay, much higher species richness was observed along with much lower tanaid abundance.

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Authors and Affiliations

Magdalena Błażewicz-Paszkowycz
Krzysztof Jażdżewski
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Abstract

A survey of breeding birds was carried out during the summer 1997-98 in several localities of the northern Danco Coast, Antarctic Peninsula. A total of 10 species were recorded: Pygoscelis antarctica (3234 pairs), P. papua (1888), Macronectes giganteus (76), Daption capense (61), Oceanites oceanicus (104), Phalacrocorax bransfieldensis (92), Ononis alba (15), Catharacta maccormicki (168), Lams dominicanus (583) and Sterna vittata (160 pairs).

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Authors and Affiliations

Marco Favero
Néstor Rubén Coria
Maria Paula Beron
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Abstract

Heartbeat and respiration of southern elephant seals (Mirounga leonina), Weddell seals (Leptonychotes weddellii) and Antarctic fur seals (Arctocephalus gazella) were monitored simultaneously using a visual and non-intrusive method, at King George Island, South Shetland Islands. All three species demonstrated sleep apnoea with reduced heart rate. In adult elephant seals, heartbeat fell 18% in apnoea; spells lasted up to nine min, usually ending in disturbance from conspecifics or human visitors. Slight human disturbance (notably slight noise) reduced time spent in apnoea from over 40% to 4%, significantly reducing the frequency of falling into apnoea and increasing mean heartbeat. Further disturbance resulted in head raising, aggression, scratching, rolling and movement away. The visual monitoring of heartbeat and respiration can be used with resting or slightly disturbed animals but not when major body movements occur.

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Authors and Affiliations

Katarzyna Salwicka
Bernard Stonehouse
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Abstract

This bibliography presents a list of 169 papers of Polish authors, treating on the Antarctic zooplankton. The majority of these papers (67%) concern Antarctic krill (Euphausia superba Dana), mainly its biology, ecology and physiology. Quite numerous papers by Polish authors concerning the biochemistry of krill as well as its fishing technique and food - processing are here omitted.

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Authors and Affiliations

Wojciech Kittel

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