Multiple paternity is related to adult sex ratio and sex determination system in reptiles

The adult sex ratio (ASR, the proportion of males in the adult population) is an emerging predictor of reproductive behaviour, and recent studies in birds and humans suggest it is a major driver of social mating systems and parental care. ASR may also influence genetic mating systems. For instance, male-skewed ASRs are expected to increase the frequency of multiple paternity (defined here as a clutch or litter sired by two or more males) due to higher rates of coercive copulations by males and/or due to females exploiting the opportunity of copulation with multiple males to increase genetic diversity of their offspring. Here we evaluate this hypothesis in reptiles that often exhibit high frequency of multiple paternity, although its ecological and life-history predictors have remained controversial. Using a comprehensive dataset of 81 species representing all four non-avian reptile orders, we show that increased frequency of multiple paternity is predicted by more male-skewed ASR, and t..., , Data sets for the paper Pipoly et al. Multiple paternity is related to adult sex ratio and sex determination system in reptiles.
 
AVERAGE dataset. Used data in the analyses and their references. Average species values are present where relevant.

MP = multiple paternity (ratio from 0 to 1)
EC = number of examined clutches for paternity analyses
ASR = adult sex ratio
SDS = Sex determination system
MBS = male body size (in grams)
FBS = female body size (in grams)
BS = body mass (non-sex-specific or average of male and female body size (in grams)
SSD = sexual size dimorphism (log10(male body mass / female body mass)
CS = clutch size (avg)
RM = reproductive mode (VIV = viviparous, OVI = oviparous)
LD = absolute latitudinal degree of the location of population(s) studied for multiple paternity (avg if relevant)
Order3 = non-standard classification with separating squamates to Lizards and Snakes

POP dataset. Collected population-level multiple paternity values about reptiles and their ref...