The contribution of small individuals to density-body size relationships: examination of energetic equivalence in reef fishes

Ackerman, John L., Bellwood, David R., and Brown, James H. (2004) The contribution of small individuals to density-body size relationships: examination of energetic equivalence in reef fishes. Oecologia, 139 (4). pp. 568-571.

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Abstract

A key relationship in ecology is that between density and body size, with the emphasis placed on energetic rules constraining the abundance of larger organisms below that of smaller organisms. Most studies have focused upon the density-body size relationship at the species level. However, energy is gathered at an individual level. We therefore examined this relationship in a coral reef fish assemblage, focusing on individuals. Using a comprehensive data set, with over 14,000 observations we found that the relationship between local density and adult body size differs from the linear relationship predicted by the lsquoenergetic equivalence rulersquo. However, excluding the smallest size classes, the relationship between body size and individual abundance for intermediate to larger fish did not depart from the predicted –0.75. Unlike plants and intermediate to large reef fishes, the smallest fishes appear to have constraints that may reflect different patterns of resource acquisition.

Item ID: 6989
Item Type: Article (Refereed Research - C1)
Keywords: acquisition; capacity; resource; species; utilisation
ISSN: 1432-1939
Date Deposited: 30 Mar 2010 23:21
FoR Codes: 06 BIOLOGICAL SCIENCES > 0602 Ecology > 060205 Marine and Estuarine Ecology (incl Marine Ichthyology) @ 100%
SEO Codes: 96 ENVIRONMENT > 9605 Ecosystem Assessment and Management > 960508 Ecosystem Assessment and Management of Mining Environments @ 100%
Citation Count from Web of Science Web of Science 26
Downloads: Total: 2
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