Table 2 Explanatory and response variables included in the models examining the links between personality traits and variables of reproductive success.
From: Linking personality traits and reproductive success in common marmoset (Callithrix jacchus)
Variable name | Symbol | Notes |
|---|---|---|
Explanatory variables | ||
Male trait value | tM | Computed as unit-weighted z-score across all males |
Female trait value | tF | Computed as unit-weighted z-score across all females |
Mean trait value | t | Within pair, t = (tm + tf)/2 |
Similarity index | |∆t| | |∆t| =|tm − tf|; low value ~ similar scores, high value ~ dissimilar scores within pair |
Signed similarity index | ∆t | ∆t = tm − tf; positive value ~ higher score in male, negative value ~ higher score in female |
Litter number | N | Sequential number of given litter (measure of reproductive history) |
Litter size at birth | B | Including stillborn offspring |
Pair duration | D | Duration (in years) |
Supplementary feeding | F | Binary explanatory variable |
Response variables | ||
Length of short inter-birth interval | LIBI(short) | Only inter-birth intervals shorter than 166 days; measured in days |
Length of long inter-birth interval | LIBI(long) | Only inter-birth intervals longer than 165 days; measured in days |
Probability of long inter-birth interval | Plong | Interval longer than 165 days |
Litter size at birth | B | Number of offspring, including stillborn ones |
Probability of infant survival | s | Only live-born infants considered; until 3 months of age |
Fecundity rate | R1 | Total fecundity per year (total litter size, including stillborn offspring) |
Fecundity rate | R2 | Total number of weaned offspring surviving until 3 months of age per year |
