Cyclopid copepods from samples of fauna associated with aquatic macrophytes and plancton obtained in lotic and lentic environments were obtained from the upper Paraná River floodplain (in the states of Paraná and Mato Grosso do Sul, Brazil). Macrophytes were collected in homogeneous stands and washed. Plankton samples, taken from the water column surface and bottom, were obtained using a motor ...

Volumetric studies in a range of animals (London taxi-drivers, polygynous male voles, nest-parasitic female cowbirds, and a number of food-storing birds) have shown that the size of the hippocampus, a brain region essential to learning and memory, is correlated with tasks involving an extra demand for spatial learning and memory. In this paper, we report the quantitative advantage that food sto...

Abstract Nowadays, the ecology and evolutionary potential of alien species are subjects several ecological studies. The goal this study was to compare feeding preference Arion ater on seedlings leaves native plant species. Seedlings three one were offered slugs individually in combination. Afterward, leaf discs from collected same source site slug’s habitat combination for slugs. When new emerg...