Macrolophus pygmaeus (Hemiptera: Miridae) is an important predator of pests of horticultural crops and here its ability as a predator of Acyrthosiphon pisum (Hemiptera: Aphididae) is addressed for the first time. The percentage predation of the different aphid instars and the number partially consumed were studied. Our results, obtained using choice and no-choice tests, revealed that M. pygmaeus caught and consumed more young than later instars of A. pisum, which confirms results of previous studies using other species of aphids. We also studied the interactions between predators (male/female) foraging in the same patch. When the prey/predator ratio is kept constant at 10 : 1 the average percentage of aphids completely consumed by individual females or males does not change with increase in the number of foraging predators. However, the number of partially consumed aphids decreased when females shared the same patch. In contrast, there was an increase in the number of aphids partially consumed when two males shared the same patch. The results were discussed in terms of potential predator foraging strategies since intraspecific competition is a key factor modulating the dynamics of prey-predator systems., Juliana Durán Prieto, Vincenzo Trotta, Paolo Fanti, Cristina Castañé, Donatella Battaglia., and Obsahuje bibliografii
The author presents the preliminary results of the excavation of the Mikulčice acropolis fortifi cation near Church II. Any rampart is the largest such structure built by the Mojmír dynasty. The importance of this particular fortifi cation lies in the fact that it is the rampart of the main area of one of the top Great Moravian centers of power that protected, among other things, a number of religious buildings and a district with the only properly documented stone palace of a Great Moravian ruler. Great Moravian rampart is composed of a stone face wall, clay-wood core strengthened by grates and a stone substructure ringed by stake palisades, in front of, and in some places partially under, the face wall. The substructure’s role was most likely to bear the face wall’s weight and to strengthen the artifi cial slope under it against water erosion by the nearby river. The conclusion poses the main issues and unknowns that remain to be discovered and answered about the Mikulčice fortifi cation, Marian Mazuch., and Obsahuje seznam literatury