Parental care is common throughout the animal kingdom and among caring species there is a bewildering variation in how parents care for offspring, as well as in the amount of resources parents invest in care. For instance, there is considerable variation in the relative parental investment by the sexes – in some species females invest more, in others males invest more, and in some investment is...

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...