Abstracts of the 4th annual meeting of the European society for chronobiology jointly with the 3rd annual meeting of the British society for chronobiology,Birmingham, UK., July 9–12,1988

Abstract

In common voles (Microtus arvalis) and golden hamsters (Mesocricetus auratus) circadian changes in the susceptibility to acute dosing of rodenticides, zinc phosphide and crimidine, were investigated. Animals were dosed at four different times of day (2.00, 8.00, 14.00, 20.00 h) and mortality, convulsive seizure, latency period to first seizure, and running wheel activity were studied. Both voles and hamsters showed the highest susceptibility to zinc phosphide during the light period. In case of crimidine, circadian pattern of susceptibility was noted only in hamsters with the highest mortality during the beginning of the dark period. The data demonstrate that circadian changes in susceptibility to rodenticides have to be taken into account.     

Studien über die Entwicklungserregung

Ohne ZusammenfassungVorgelegt der Akademie der Wissenschaften in Krakau in der Sitzung der math.-naturw. Klasse am 5. Dezember 1910. Vgl. vorl. Mitteil. unter dem Titel: »über den Einflu\ des Spermas der AnnelideChaetopterus auf die Echinideneier und über die antagonistische Wirkung des Spermas fremder Tierklassen auf die Befruchtungsfähigkeit der Geschlechtselemente.« Bull. de l'Ac. des Sc. de Crac. 1910.     

Die räumlichen Verhältnisse im Fruchtknoten und in der Frucht vonAesculus in mathematischer Behandlung

Ohne Zusammenfassung     

Secondary vegetation succession in the Belianské Tatry Mts. three decades after grazing

Vegetation changes in seminatural plant communities in the Belianské Tatry Mts. have been studied three decades after grazing or mowing. The changes are slow, they have reached the association level only after about 20 years.