This book presents a comprehensive review of various biological and ecological studies in animal science, including their embryology, evolution, classification, habitats and distribution. Topics discussed herein include the aphid behaviour in a multitrophic environment; mechanisms determining benthic adult distributions of estuarine and coastal crabs; feeding ecology of the pig-tailed macaques; adult neurogenesis in primates; and visceral adiposity and splanchnic organ mass in non-pregnant dry Holstein cows.