Data from: Life history evolution in guppies VIII: the demographics of density regulation in guppies (Poecilia reticulata)

David N. Reznick, Ronald D. Bassar, Joseph Travis & F. Helen Rodd
In prior research, we found the way guppy life histories evolve in response to living in environments with a high or low risk of predation is consistent with life history theory that assumes no density-dependence. We later found that guppies from high predation environments experience higher mortality rates than those from low predation environments, but the increased risk was evenly distributed across all age/size classes. Life history theory that assumes density-independent population growth predicts that...
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