Table 2 Model structure overview.
Food competition hypothesis | Mate competition hypothesis | ||||||
|---|---|---|---|---|---|---|---|
Model | Response | Fixed effects | Random effects | Model | Response | Fixed effects | Random effects |
1a | Frequency of aggression in the feeding context | Offspring age | Gibbon group ID, subject ID | 2a | Frequency of aggression in non-feeding contexts | Offspring age, sex dyad | Gibbon group ID, subject ID |
1b | Co-feeding time/total feeding time | Offspring age | Gibbon group ID, subject ID | 2b | Grooming time / total observation time | Offspring age, sex dyad | Gibbon group ID, subject ID |
1c | Time spent within 1 m in the co-feeding context | Offspring age | Gibbon group ID, subject ID | 2c | Time spent within 1 m in non-feeding contexts | Offspring age, sex dyad | Gibbon group ID, subject ID |
1d | Frequency of approaching feeding parents | Offspring age | Gibbon group ID, subject ID | 2d | Frequency of approaching non-feeding parents | Offspring age, sex dyad | Gibbon group ID, subject ID |
