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Table 5 Effect of litter size on the reproductive performance of female guinea pigs maintained on a control (n =10), high-PUFA (n = 8), or high-SFA (n = 10) diet and the general effect of litter size

From: Reproductive performance and gestational effort in relation to dietary fatty acids in guinea pigs

Reproductive parameter Control PUFA SFA Litter sizea
Sex ratiob 0.081 (−0.192, 0.356) −0.195 (−0.638, − 0.055) −0.042 (−0.398, 0.170) −0.017 (−0.016, −0.020)
Gestation durationc 0.278 ± 0.675 −0.500 ± 0.954 −0.281 ± 0.939 −0.294 ± 0.315
Total litter massc 110.590 ± 14.616*** 90.917 ± 20.756*** 95.406 ± 20.426*** 98.957 ± 8.215***
Individual birth massc −2.124 ± 4.669 −4.144 ± 6.664 −10.351 ± 6.950* −4.929 ± 2.562
Survival rateb −0.174 (−0.382, −0.034)* −0.035 (−0.460, 0.036) −0.056 (−0.803, −0.028) −0.120 (−0.020, −0.273)*
  1. *p ≤ 0.05, **p ≤ 0.01, ***p ≤ 0.001 for significant effects of litter size
  2. aEffect of litter size determined after removal of non-significant effects based on the AIC. No significant differences between single groups (for all pairwise comparisons P > 0.05)
  3. bData given as (mean) effect size and lower and upper confidence limits; analysis via GLM with binomial link
  4. cData given as slope ± standard error of the slope; analysis via linear model or LME