| Summary: | Pages 10-17 24 cm Bibliographical references (pages 15-16) Abstract in English This review of a number of factors draws the reader’s attention to the lackof simultaneous studies on biotic and abiotic factors influencing reproduction ofsmall rodents: only the simultaneous investigations — in the author’s opinion —could probably show which of the factors play the most important role underdefinite circumstances. It seems very likely that there exists a hierarchy of thefactors which is variable and dependent on the location of sample site within theinvestigated population area, for at the borderline of the species range thereusually a strong pressure of abiotic factors is exerted on the population, and —contrary to that — within the central (optimal) part of the range the regulatoryphenomena existence have been shown. Strony 10-17 24 cm Bibliografia na stronach 15-16 Streszczenie w języku angielskim This review of a number of factors draws the reader’s attention to the lackof simultaneous studies on biotic and abiotic factors influencing reproduction ofsmall rodents: only the simultaneous investigations — in the author’s opinion —could probably show which of the factors play the most important role underdefinite circumstances. It seems very likely that there exists a hierarchy of thefactors which is variable and dependent on the location of sample site within theinvestigated population area, for at the borderline of the species range thereusually a strong pressure of abiotic factors is exerted on the population, and —contrary to that — within the central (optimal) part of the range the regulatoryphenomena existence have been shown.
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