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Abstract

From July to October 1977, during the polar winter and at the beginning of spring, line-fishing was carried out at Admiralty Bay, near the Arctowski Station on King George Island, (South Shetland Islands). At that time only three species of fish were caught: Notothenia rossi marmorata, Notothenia coriiceps neglecta and Trematomus newnesi. Fish was caught in the irshore zone at depths ranging from 2 to 40—60 m.

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Authors and Affiliations

Czesław Żukowski
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Abstract

Blood of 71 specimens of Notothenia rossii marmorata and 61 specimens of Notothenia neglecta from the region of Admiralty Bay (King George Island) was examined. The number of erythrocytes and hemoglobin content were higher in the blood of N. neglecta. The number of erythrocytes and hemoglobin content were similar in males and females of both species. Considerable differences were noted between individual specimens.

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Stanisław Rakusa-Suszczewski
Czesław Żukowski
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Abstract

232 specimens of Notothenia coriiceps neglecta and 578 specimens of Notothenia rossi marmorata were collected in the region of Admiralty Bay during the period from March to December 1977. The age of the fish was determined from scales. Length — weight relationship was calculated for both species. The parameters of the von Bertalanffy equation were calculated for Notothenia coriiceps neglecta, whereas mean lengths for Notothenia rossi marmorata were given according to the particular age groups.

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Authors and Affiliations

Tomasz B. Linkowski
Czesław Żukowski
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Abstract

Analysis of food contents of 784 stomachs was made in 5 species of fishes of the family Nototheniidae: Notothenia coriiceps neglecta. Notothenia rossi marmorata, Notothenia nudifrons, Trematomus newnesi and Pleuragramma antarcticum. In the food of the first two of the mentioned species benthic forms predominated and among them Amphipoda were a decidedly preferred component. The composition of the food of N. nudifrons indicates that they feed at the bottom of the sea, the most preferred component of their diet, however, were pelagic Salpae. T. newnesi and P. antarcticum are characterized by a typically pelagic kind of food. The comparison of food composition and the values of the stomach fullness indices in N. coriiceps neglecta, N. rossi marmorata and T. newnesi in the summer and winter seasons shows a markedly higher feeding intensity in the summer.

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Authors and Affiliations

Tomasz B. Linkowski
Piotr Presler
Czesław Żukowski

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