In the plankton samples, collected with a Nansen net in three water layers downwards to a depth of 500 m, larvae and eggs of Euphausia superba were found as well as the larvae of E. crystallorophias and E. frigida. Eggs of the species E. superba predominated and among the larvae most numerous were calyptopis I and metanauplius stages. Eggs and larvae of E. superba occurred in small quantities, mainly in Bransfield Strait. Larvae of E. crystallorophias were found in the southeastern part of Bransfield Strait. Metanauplius, calyptopis I and II stages were predominant. Larvae of E. frigida, mostly calyptopis I stage, were very scarce and occurred only at the stations located in Drake Passage.

Distribution and population age structure of krill Euphausia superba larvae is presented for four consequent years on the basis of the summer materials from 1976 to 1979. An approximate rate of growth of krill larvae was calculated on the basis of the above observations and the literature data on the occurrence of particular larval stages. This allowed to determine the main period of krill breeding in particular years. Intense breeding of krill took place from January to middle of March in summers 1976/1977 and 1977/1978, but much earlier — mid November to mid January in 1975/1976. In summer of 1978/1979 the breeding of krill was poor till March.

Starting from the statement that self-reflection is necessary for the development of any scientific discipline, the author of this article—a historian and sociologist—considers the characteristics of research on everyday life. What is the subject of this subdiscipline and when did such research start? What methods does it use? The author reflects on these issues, while referring to his own experience as a historian and to the book by Bogumiła Mateja-Jaworska and Marta Zawodna- -Stephan, Badania życia codziennego. Rozmowy (nie)codzienne w Polsce (2019) [Studies of Everyday Life: (Not) Everyday Conversations in Poland], in which the statements of contemporary everyday researchers are quoted. The author concludes that the beginnings of such research should be sought in the very distant past and that its material might be provided by all the creations of human culture. He also wonders if and how evidence of the modern digital age will survive.

Life history is a term usually assigned in the history of historiography to the Italian school of microhistory. In fact, it is a concept typical for the natural sciences in the case of which it is a framework focused on studies of life history strategies as well as life cycles. Life history analysis has become the subject of numerous studies around the world and has been gaining in popularity in social sciences. The author presents life history as a certain research perspective for historical studies which is capable of incorporating both natural and cultural approaches. He draws inspirations of the life history perspective from recent research into history of modern Poland.