Transgenerational effects of maternal corticosterone across early life in a viviparous snake

Data description for data files associated with Palacios et al. 2022, "Transgenerational effects of maternal corticosterone across early life in a viviparous snake" to be published in General and Comparative Endocrinology and RMarkdown file containing R code and output, including statistical tests and data figures, used in the study.

"Palaciosetal_2022_GCE_MomData.csv"
Provides data on maternal reproduction and corticosterone in wild-caught garter snakes (Thamnophis elegans).

Snake_ID: Individual snake identifier
Eco: Life-history ecotype of snake (genetic background): M-slow (M) or L-fast (L)
Pop: Three-letter code for population of origin
PopCode: Code for population of origin
SVL: Snout-vent length (mm) measured after parturition
Mass: Mass (g) measured after parturition
Neonates: Number of live offspring
Stillborn: Number of dead offspring
Yolks: Number of yolks
nF: Number of female offspring in litter
nM: Number of male offspring in litter
Time: Time point of blood sample for measuring circulating corticosterone: pre- or post-parturition
DaystoParturition: Number of days before (positive number) or after (negative number) parturition when blood sample was collected
CORT: Circulating corticosterone measured in blood plasma (ng/mL)

"Palaciosetal_2022_GCE_BabyData.csv"
Provides data on early-life phenotypes and corticosterone in captive-born garter snakes (Thamnophis elegans).

BabyID: Individual snake identification; combination of Litter and Baby numbers
DOB: Date of birth (day-month-year)
Eco: Life-history ecotype of snake (genetic background): M-slow (M) or L-fast (L)
Pop: Name of population of origin
PopCode: Code for population of origin
Litter: Identification number for each litter born (2010 captive snake Cohort)
Treatment: Thermal treatment each snake was raised under: Warm (A) or Cool (B)
Sex: Male (M) or Female (F)
BirthSVL: Snout-vent length (mm) measured at birth
BirthMass: Mass (g) measured at birth
Time: Age at sampling: Neonate/3-month olds (1) or Juvenile/12-month olds (2)
SVL: Snout-vent length (mm) measured at the time of sampling
Mass: Mass (g) measured at the time of sampling
CORT: Circulating corticosterone measured in blood plasma (ng/mL)
MomCORTpre: Pre-parturition circulating corticosterone of mother measured in blood plasma (ng/mL)