Key Terms
Females choose mates based on some characteristic associated with high fitness (attracted to males of best condition)
What is the good gene hypothesis?
Are local non-neighbors' offspring more heterozygous than non-local males?
No, matings from non-local males have higher heterozygosity than local non-neighbors.
Why are the researchers looking at/measuring these traits?
Because crown chroma, crown hue, and crown brightness can overall indicate body health in birds and therefore signal fitness to females.
What does the table say about female birds?
That female heterozygosity affects female survival and reproduction
Females choose mates based on who is the best genotypic match (females attracted to more divergent loci)
What is the genetic compatibility hypothesis?
What is this figure presenting overall?
That females can enjoy a greater diversity of offspring by seeking extra-pair copulations specifically with non-local males and possible neighbors
Which trait observed did not have a significant correlation with heterozygosity?
What is crown brightness
What trait is being measured by the #of eggs sired and fledglings recruited from a male bird?
What is Fitness
Opportunistic mating outside of social pair bond.
What is extra-pair copulation?
Why do you think that close neighbors are non-significant (Z=-0.05, P=0.96)
Because they are more closely related to the females, therefore they were not adding anything to the gene pool
What crown appearance does Figure 2 show?
What is a higher ultraviolet component (chroma) and a more short-wave-shifted hue?
What variables not shown in the table could be acting on males?
territory establishment in autumn, pre-reproduction stressors
What is promiscuity?
Male and female individuals mate with multiple partners AND social ties are present.
What is polygnandry?