There is a specific feature in the developmental biology of oviparous snakes: embryos eggs, which were just laid, have already undergone significant development. This fact makes it significantly complicated to obtain data on organs’ development at early stages embryogenesis. In addition, fertilization time and duration snake pregnancy wild are unknown. order an grass Natrix natrix (Linnaeus, 17...

The Mediterranean Ononis species, O. fruticosa, O. natrix subsp. ramosissima and O. tridentata, have been analyzed for their exudate flavonoids. More than 20 flavonoid aglycones were identified, some of which are rather rare natural compounds. One of them, namely hypolaetin-8,3',4'-trimethyl ether, had been found only once before. The results are presented in a table along with literature data,...

Investigations into occurrence of fungus Aphanomyces frigidophilus in water of springs Dojlidy Górne, Jaroszówka and Pietrasze within the town Białystok in Podlasie Province, Poland were conducted in Winter, Spring, Summer and Autumn of the year 2005. Samples were processed in the laboratory by routine methods commonly used to isolate these organisms. Bait method with the use of hemp seeds Can...

Animal colouration has a significant ecological role in defence, reproduction, and thermoregulation. In the case of melanism, it is complex topic. Besides potential disadvantages such as higher risk predation, melanistic ectotherms may have certain physiological advantages more efficient thermoregulation colder climates thus, reduced basking time. The common grass snake ( Natrix natrix ) widesp...