Purpose: Vine growing for the production of wine constitutes one of the major areas of agriculture of the Czech Republic, and in recent years, it has been qualitatively improved. The purpose of this paper is to find out whether oligopolistic market structures have come into being on the...

The prevalent, and so far most explored, host defense against brood parasitism is egg discrimination. Not only do the hosts differ markedly in their propensity to reject parasitic eggs but rejecters even vary in their egg rejection times. The focus of the present study was to investigate factors...