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Table 2 Models relating male sperm quality to male competitive ability

From: Competitive males have higher quality sperm in a monogamous social bee

Selection episode Model Response Probability distribution Predictors Random effect
Colony -Aggregation sperm viability proportion of live to dead sperm cells Binomial sampling site and number of days in incubator colony and malea
sperm length sperm length Normal sampling site colony and male
sperm length variation sperm CV Normal sampling site colony
Persistence time in the aggregation sperm viability proportion of live to dead sperm cells Binomial days at aggregation aggregation and malea
sperm number number of sperm cells Poisson days at aggregation aggregation and male
sperm length sperm length Normal days at aggregation aggregation and male
sperm length variation sperm CV Normal days at aggregation aggregation
  1. Each trait was analyzed according to a particular probability distribution and random effects were included to account for dependence among samples or overdispersion
  2. aObservation level random effect to account for overdispersion