Data from: Alternative reproductive tactics and lifetime reproductive success in a polygynandrous mammal

Adele Balmer, Bertram Zinner, Jamieson C. Gorrell, David W. Coltman, Shirley Raveh & F. Stephen Dobson
The widespread occurrence of alternative reproductive tactics (ARTs) highlights the diverse ways in which sexual selection can operate within a population. We studied ARTs in Columbian ground squirrels (Urocitellus columbianus), evaluating paternity, lifetime reproductive success, and life histories. Reproductively mature male Columbian ground squirrels displayed either a territorial or satellite (non-territorial) tactic. Territorial males secured a higher proportion of copulations, were more likely to mate at earlier positions in females’ mating sequences and sired more...
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