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vol. 163, no. 5 the american naturalist may 2004 Spatial Scale and Temporal Component of Selection
 

Summary: vol. 163, no. 5 the american naturalist may 2004
Spatial Scale and Temporal Component of Selection
in Side-Blotched Lizards
Erik I. Svensson1,* and Barry Sinervo2,
1. Department of Ecology, Section for Animal Ecology, Lund
University, SE-223 62 Lund, Sweden;
2. Department of Ecology and Evolutionary Biology, University of
California, Santa Cruz, California 95064
Submitted April 23, 2003; Accepted December 3, 2003;
Electronically published May 4, 2004
abstract: Spatial variation in selection has long been recognized
as promoting population divergence and in maintaining genetic poly-
morphisms, but selection at a fine spatial scale is seldom measured
directly. We analyzed spatial and temporal variation in selective re-
gimes on egg size using long-term population data of the side-
blotched lizard (Uta stansburiana). Juvenile survival rates varied be-
tween years at a small spatial scale that was reflected as a strong
interaction between the local neighborhood level and year. Spatially
and temporally variable selection acted jointly on egg mass, which
presumably would facilitate the maintenance of high additive genetic

  

Source: Agrell, Jep - Department of Ecology, Lunds Universitet
Svensson, Erik - Department of Ecology, Lunds Universitet

 

Collections: Environmental Sciences and Ecology