The interaction between the spatial distribution of resource patches and population density: consequences for intraspecific growth and morphology

The Journal of Animal Ecology
Bailey JacobsonPedro R Peres-Neto

Abstract

How individuals within a population distribute themselves across resource patches of varying quality has been an important focus of ecological theory. The ideal free distribution predicts equal fitness amongst individuals in a 1 : 1 ratio with resources, whereas resource defence theory predicts different degrees of monopolization (fitness variance) as a function of temporal and spatial resource clumping and population density. One overlooked landscape characteristic is the spatial distribution of resource patches, altering the equitability of resource accessibility and thereby the effective number of competitors. While much work has investigated the influence of morphology on competitive ability for different resource types, less is known regarding the phenotypic characteristics conferring relative ability for a single resource type, particularly when exploitative competition predominates. Here we used young-of-the-year rainbow trout (Oncorhynchus mykiss) to test whether and how the spatial distribution of resource patches and population density interact to influence the level and variance of individual growth, as well as if functional morphology relates to competitive ability. Feeding trials were conducted within stream channe...Continue Reading

References

Aug 18, 2000·Immunopharmacology and Immunotoxicology·M Domingues-JuniorJ Palermo-Neto
Jan 28, 2003·The Journal of Experimental Biology·Eliot G Drucker, George V Lauder
Jul 22, 2008·Evolution; International Journal of Organic Evolution·Pim EdelaarJean Clobert

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