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ORIGINAL PAPER Predator biomass, prey density, and species composition effects

Predator biomass, prey density, and species composition effects
on group size in recruit coral reef fishes
Edward E. DeMartini Todd W. Anderson
Alan M. Friedlander James P. Beets
Received: 3 November 2010 / Accepted: 22 June 2011
Springer-Verlag (outside the USA) 2011
Abstract Group incidence and size are described for
recruit parrotfishes, wrasses, and damselfishes on Hawaiian
reefs over 3 years (20062008) at sites spanning the
archipelago (2028N, 155177W). Coral-poor and coral-
rich areas were surveyed at sites with both low (Hawaii
Island) and high (Midway Atoll) predator densities, facil-
itating examination of relations among predator and recruit
densities, habitat, and group metrics. Predator and recruit
densities varied spatially and temporally, with a sixfold
range in total recruit densities among years. Group (C2
recruits) metrics varied with time and tracked predator and
recruit densities and the proportion of schooling species.
Groups often included heterospecifics whose proportion


Source: Anderson, Todd - Department of Biology, San Diego State University


Collections: Biology and Medicine; Environmental Sciences and Ecology