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Table 2 Fertility: generalized linear mixt models (GLMM, Poisson distribution, Log link function) analysing the factors influencing the number of larvae produced by females (a), (n = 638) and males (b), (n = 737)

From: Sex-specific patterns of senescence in artificial insect populations varying in sex-ratio to manipulate reproductive effort

A

B

Sources

d.f.

χ2

p

Sources

d.f.

χ2

p

Female mass

1

82.755

< 0.001

Female mass

1

243.13

< 0.001

Age

1

388.9

< 0.001

Age

1

94.819

< 0.001

Sex-ratio

2

0.7232

0.277

    

Sex-ratio x Age

2

100.44

< 0.001

    
  1. Initial models included Sex-ratio condition, Age (in weeks as a continuous variable), their interaction, male and female body mass (Mass in mg) and replicates as a random factor. The models shown here are those minimizing the AICc, with δAICc > 2. Age was allowed to vary up to 11 and 13 weeks in females and males, respectively. Beyond these values no insects could be assayed anymore in some sex-ratio conditions (see Additional file 1: Figure S2). Values where p ≤ 0.05 are given in bold