Figure 2.
The relationship between extent of sperm retention (i.e. ‘highest sperm number on eggs’, only including clutches with sperm) for red junglefowl females that retained sperm (i.e. only including clutches with sperm; table 1c) after ‘controlled natural mating’ (filled diamonds) and ‘artificial insemination’ (open squares), and similarity between partners at the MHC class I minor locus (‘low’ similarity = 0, ‘intermediate’ similarity = 0.50–0.67, ‘high’ similarity = 1; ‘controlled natural mating’: nclutches = 6, 20, 7, respectively; ‘artificial insemination’: nclutches = 6, 17, 10, respectively). Data are represented as ±s.e.m. Controlled natural mating: nclutches = 33, nfemales = 29; artificial insemination: nclutches = 33, nfemales = 25.