The heritability is computed as follows: where is the genetic variance, var(h × y) the herd year variance, p the proportion of uncensored animals.
The heritability was computed as: where is the genetic variance, var(h × y) the herd year variance, p the proportion of uncensored animals, the dam within maternal grandsire variance and genetic variance = 4 * sire variance.
The effective heritability was computed as: where is the genetic variance, var(h × y) the herd year variance, p the proportion of uncensored animals and genetic variance = 4 * sire variance.
The pedigree file had the same structure and the heritability was computed with the equation: where is the genetic variance, var(h × y) the herd year variance, p the proportion of uncensored animals and genetic variance = 4 * sire variance.
The following equation was used: where is the genetic variance, var(h × y) the herd year variance, p the proportion of uncensored animals and genetic variance = 4 * sire variance.
To allow easy comparison with other studies, herd-year variances and permanent environmental variances were not included in the phenotypic variance but are provided in Additional file 1: Tables S1 and S2.
In 2002, Babbo obtained a 10-year variance.
Four male subjects (average age 24 years, variance 1.6), were divided into two groups randomly.
This variability in detection times is not surprising because of the year-to-year variance observed in the onset of the seasonal increase.
However, it is noteworthy that the among-year variance in the within-individual correlation for the novelty avoidance/aggression relationship is the highest.
In contrast, the same procedure led to a significant increase in model fit when modelling homogenous residuals across years (variance estimate 10.441 (3.374) (S.E ., X 2 = 19.1, P < 0.0001; Table 4), suggesting that females varied in their response to temperature.
