Density-dependent dispersal occurs throughout the animal kingdom, and has been shown to occur in some taxa whose populations exhibit multi-year population cycles. However, the importance of density-dependent dispersal for the spatiotemporal dynamics of cyclic populations is unknown. We investigated the potential effects of density-dependent dispersal on the properties of periodic travelling wav...

precepts and example of John Hunter, and traced the nervous system in its gradations, step by step, from the lower to the higher classes of the animal kingdom, we should have been spared those long discussions to disprove that the spinal chord is made up of an assemblage of nerve tubes, which pass in an unbroken line from the periphery to the brain; or those figurative expressions, so productiv...

BACKGROUND Animals' ability for cross-modal recognition has recently received much interest. Captive or domestic animals seem able to perceive cues of human attention and appear to have a multisensory perception of humans. METHODOLOGY/PRINCIPAL FINDINGS Here, we used a task where horses have to remain immobile under a vocal order to test whether they are sensitive to the attentional state of ...

This study analyzes the occurrence and distribution of phylogenetic groups of 391 strains of Escherichia coli isolated from poultry, cattle, and water buffalo. The frequency of the phylogroups was A = 19%, B1 = 57%, B2 = 2.3%, C = 4.6%, D = 2.8%, E = 11%, and F = 3.3%. Phylogroups A (P < 0.001) and F (P = 0.018) were associated with E. coli strains isolated from poultry, phylogroups B1 (P < 0.0...