THE STRATEGY OF EGGS DEPOSITION BY TETRODONTOPHORA-BIELANENSIS (COLLEMBOLA) IN THE YEAR 1994

According to Krzysztofowicz and Jura (1995) Tetrodontophora bielanensi s deposit the eggs in autumn, in different terms, between 30th of Octo ber and 1st of December. Depending on the temperature of environment t he vitellogenesis lasts 60-91 days. The occurrence in September, this is in the period when the process of vitellogenesis is most intense, o f more days than normally with sub-zero temperatures accelerates the t erm of the beginning of eggs deposition. In present paper these observ ations were fully confirmed. In the autumn of the year 1994 the eggs w ere deposited beginning from 22nd of November. In September of this ye ar there were not noted the days with sub-zero temperatures, the proce ss of vitellogenesis was comparatively prolonged and continued 82 days . Basing on literature, the influence of the juvenile hormone on the p rogress of vitellogenesis is discussed.