title: The ontogeny of home ranges: evidence from coral reef fishes.
abstract: The concept of home ranges is fundamental to ecology. Numerous studies have quantified how home ranges scale with body size across taxa. However, these relationships are not always applicable intraspecifically. Here, we describe how the home range of an important group of reef fish, the parrotfishes, scales with body mass. With masses spanning five orders of magnitude, from the early postsettlement stage through to adulthood, we find no evidence of a response to predation risk, dietary shifts or sex change on home range expansion rates. Instead, we document a distinct ontogenetic shift in home range expansion with sexual maturity. Juvenile parrotfishes displayed rapid home range growth until reaching approximately 100-150 mm length. Thereafter, the relationship between home range and mass broke down. This shift reflected changes in colour patterns, social status and reproductive behaviour associated with the transition to adult stages. While there is a clear relationship between body mass and home ranges among adult individuals of different species, it does not appear to be applicable to size changes within species. Ontogenetic changes in parrotfishes do not follow expected mass-area scaling relationships.
authors.affiliation: Australian Research Council Centre of Excellence for Coral Reef Studies, James Cook University, , Townsville, Queensland 4811, Australia, School of Marine and Tropical Biology, James Cook University, , Townsville, Queensland 4811, Australia.
authors.forename: J Q
authors.initials: JQ
authors.lastname: Welsh
authors.forename: C H R
authors.initials: CH
authors.lastname: Goatley
authors.forename: D R
authors.initials: DR
authors.lastname: Bellwood
mesh_terms: D000818:Animals; D049628:Body Size; D057894:Coral Reefs; D005399:Fishes / Q000033:anatomy & histology / Q000254:growth & development / Q000502:physiology*; D006702:Homing Behavior; D012741:Sexual Maturation; D013045:Species Specificity
keywords: coral reefs; ecosystem function; home range; ontogeny; parrotfish