Diet quality and prey selectivity correlate with life histories and predation regime in Trinidadian guppies
نویسندگان
چکیده
Eugenia Zandonà*, Sonya K. Auer, Susan S. Kilham, Jason L. Howard, Andrés LópezSepulcre, Michael P. O’Connor, Ronald D. Bassar, Arthela Osorio, Catherine M. Pringle and David N. Reznick Department of Biology, Drexel University, 3141 Chestnut St, Philadelphia, Pennsylvania 19104, USA; Department of Biology, University of California, 1229 Spieth Hall, Riverside, California 92521, USA; and Odum School of Ecology, University of Georgia, 140 E. Green St, Ecology Bldg, Athens, Georgia 30602-2202, USA
منابع مشابه
Parasites of Trinidadian guppies: evidence for sex- and age-specific trait-mediated indirect effects of predators.
Predation pressure can alter the morphology, physiology, life history, and behavior of prey; each of these in turn can change how surviving prey interact with parasites. These trait-mediated indirect effects may change in direction or intensity during growth or, in sexually dimorphic species, between the sexes. The Trinidadian guppy, Poecilia reticulata presents a unique opportunity to examine ...
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A common evolutionary response to predation pressure is increased investment in reproduction, ultimately resulting in a fast life history. Theory and comparative studies suggest that short-lived organisms invest less in defence against parasites than those that are longer lived (the pace of life hypothesis). Combining these tenets of evolutionary theory leads to the specific, untested predictio...
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Changes in age/size-specific mortality, due to such factors as predation, have potent evolutionary consequences. However, interactions with predators commonly impact prey growth rates and food availability and such indirect effects may also influence evolutionary change. We evaluated life-history differences in Trinidadian killifish, Rivulus hartii, across a gradient in predation. Rivulus are l...
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1. Ecological factors that alter mortality rates, such as predation, can cause evolutionary change. However, in addition to killing prey, predators can reduce prey abundance and increase food to survivors. Such indirect effects may also cause evolution. Predictions from theory that models how life histories evolve in response to increased mortality rates often change when they include indirect ...
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Vertebrates exhibit extensive variation in brain size. The long-standing assumption is that this variation is driven by ecologically mediated selection. Recent work has shown that an increase in predator-induced mortality is associated with evolved increases and decreases in brain size. Thus, the manner in which predators induce shifts in brain size remains unclear. Increased predation early in...
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تاریخ انتشار 2011