Table 2 Proportion of investment gained by pups from focal female in each paira.

From: Cryptic kin discrimination during communal lactation in mice favours cooperation between relatives

Effectb

Fixed effect

χ2

df

pc

Own mother

0.030 ± 0.014

3.94

1

0.047

Female food intaked

1.607 ± 0.145

34.95

1

<0.0001

Relatedness between females

−0.013 ± 0.022

0.33

1

0.57

  1. aFocal female was randomly assigned within each pair.
  2. bMixed-effects models include nest and mother as random effects. Likelihood ratio tests compared models with versus without each specific factor or interaction. Data for all pups from 16 communal nests (77 pups in sister nests, 81 pups in unrelated female nests), shown in Fig. 4 and Supplementary Data 1.
  3. cValues in bolded text are statistically significant (p < 0.05).
  4. dProportion of food intake over the labelling period that was due to the focal female.
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