Testes size (square mm; Testes.area) in 8 populations of common yellow dung flies (Scathophaga stercoraria) with different mating systems (Mating.system).
Usage
data(FlyTestes)
Arguments
source
Hosken, D.J. and P.I. Ward. 2001. Experimental evidence for testis size evolution via sperm competition. Ecology Letters 4: 10-13.