http://hdl.handle.net/11716/5810 2026-04-09T00:35:35Z http://hdl.handle.net/11716/5819 Wpływ promieniowania ultrafioletowego UV-A na konsumpcję tlenu przez larwy ropuchy szarej (Bufo bufo L.) w różnych okresach rozwojowych Formicki, Grzegorz The effects of ambient UV-A radiation (Cracow district, Poland, 50°04'N, 19°57'E; 220 m a.s.l.) on general metabolism was studied in gray toad tadpoles (Bufo bufo L.). General metabolism was measured as oxygen consumption at rest. Measurements were taken in tadpoles during premetamorphosis and prometamorphosis. Applied radiation caused significant increases in oxygen consumption in young tadpoles (premetamorphosis). On the other hand tadpoles exposed to UV-A radiation during the period of prometamorphosis significantly decreased their metabolic rate. These results suggest that ambient levels of UV-A radiation affect the metabolic rate of gray toad larvae living in shallow habitats. This phenomenon may increase the susceptibility of larvae to predation and ecologically relevant pathogens. The mechanism of action of UV-A on general metabolism in tadpoles is discussed. 2002-01-01T00:00:00Z http://hdl.handle.net/11716/5818 Plastyczność instynktu larw Scolioneura betuleti Klug (Hymenoptera, Tenthredinidae) Bierca, Bożena The larvae S. betuleti leaf-mine the lives of different species of birches (Betula spp.) and green alders (Alnus viridis Chaix). During the research on the biology of the larva stage of S.betuleti, the flexibility of the instinct of larvae was also studied regarding the possibilities of continuation of the development after transferring to the leaf- mine from the last stage formed by other species of the saw- fly in the leaf Betula pendula Roth, and Alnus glutinosa Gaertn. Before transferring the larva S.betuleti to the mine - the farmer inhabitant was removed. The larvae S.betuleti transferred to the top mines Fenusa pus ilia Lepeletier and Messa nana Klug in the leaves B.pendula carried on the feeding creating reversible mine. It was also similar to transferring to the mine Heterarthus vagans Fallen in the leaf A.glutinosa in the natural environment S.betuleti does not feed on this plant, only on A.viridis, in all experiments the larvae finished the feeding and abandoned the mines in order to transfer into the pupae. The experiments show the flexibility of the instinct of the larvae although their further fate is not known. 2002-01-01T00:00:00Z http://hdl.handle.net/11716/5817 Identyfikacja rośliniarek Hemichroa australis Lep. i Hemichroa crocea Geoff. (Hymenoptera, Tenthredinidae) na podstawie cech morfologiczno-biologicznych Sołtyk, Danuta This study presents the information which allowed the identification of two symphytan species, Hemichroa australis Lep. and H. crocea Geoff., in the natural environment. Morphological and biological characteristics useful in their identification, e.g., larval and adult coloration, as well as characteristics of seasonal development, egg laying and feeding by larvae are described. 2002-01-01T00:00:00Z http://hdl.handle.net/11716/5816 Wystąpienie Pseudaulacaspis pentagona Targ.-Tozz. na materiale roślinnym importowanym do Polski Dziedzicka, Anna; Karnkowski, Witold The authors describe the species Pseudaulacaspis pentagona Targ-Tozz. collected from the kiwi fruits and jasmine (Philadelphus sp.) sprouts imported to Poland in 1998. This species is a dangerous past of many cultivated and decorative plants. In this paper the morphology as well as biology at this species is presented in order to facilitate for other researches it’s identification what, in turn, should help to 1 imitate any possible threat for crops. 2002-01-01T00:00:00Z