Table 2. Analysis of the influence of age at first reproduction and relative testes mass on female median lifespan and aging rate.
Median lifespan | Aging rate | |||||||||||||
Independent variables | k | λ | R2 | Deviance | AICc | ΔAICc | wi | λ | R2 | Deviance | AICc | ΔAICc | wi | |
All species(n = 48 and 51) | Constant | 3 | 0.86 | 0.00 | 103.22 | 105.32 | 27.97 | 0.00 | 0.50 | 0.00 | 174.68 | 176.77 | 10.98 | 0.00 |
Age at first reproduction | 4 | 0.57 | 0.51 | 72.04 | 77.35 | 0.00 | 0.88* | 0.08 | 0.31 | 160.5 | 165.79 | 0.00 | 0.82* | |
Body mass | 4 | 0.63 | 0.34 | 85.48 | 90.78 | 13.43 | 0.00 | 0.38 | 0.05 | 171.34 | 176.64 | 10.85 | 0.00 | |
Testes mass+Body mass | 5 | 0.63 | 0.34 | 84.50 | 93.15 | 15.80 | 0.00 | 0.38 | 0.03 | 171.34 | 179.95 | 14.16 | 0.00 | |
Age at first reproduction+Testes mass+Body mass | 6 | 0.48 | 0.52 | 66.76 | 82.88 | 5.53 | 0.06 | <0.001 | 0.37 | 157.38 | 169.43 | 3.64 | 0.13 | |
Age at first reproduction*Testes mass+Body mass | 7 | 0.48 | 0.55 | 67.08 | 82.78 | 5.43 | 0.06 | <0.001 | 0.37 | 156.32 | 171.91 | 6.12 | 0.04 | |
All species(n = 50) | Constant | 3 | 0.67 | 0.00 | 156.42 | 158.51 | 13.41 | 0.00 | ||||||
Age at first reproduction | 4 | <0.001 | 0.39 | 139.8 | 145.10 | 0.00 | 0.87* | |||||||
Body mass | 4 | 0.44 | 0.06 | 153.32 | 158.61 | 13.51 | 0.00 | |||||||
Testes mass+Body mass | 5 | 0.43 | 0.04 | 153.3 | 161.91 | 16.81 | 0.00 | |||||||
Age at first reproduction+Testes mass+Body mass | 6 | <0.001 | 0.39 | 137.28 | 149.34 | 4.24 | 0.10 | |||||||
Age at first reproduction*Testes mass+Body mass | 7 | <0.001 | 0.38 | 136.74 | 152.37 | 7.27 | 0.02 | |||||||
Carnivores(n = 14 and 15) | Constant | 3 | <0.001 | 0.00 | 17.90 | 20.27 | 0.00 | 0.43* | 0.79 | 0.00 | 44.26 | 46.61 | 0.00 | 0.66* |
Age at first reproduction | 4 | <0.001 | 0.17 | 14.12 | 20.36 | 0.09 | 0.41 | 0.30 | 0.11 | 43.24 | 49.39 | 2.78 | 0.16 | |
Body mass | 4 | <0.001 | 0.03 | 16.36 | 22.61 | 2.34 | 0.13 | 0.80 | 0.00 | 44.26 | 50.41 | 3.80 | 0.10 | |
Testes mass+Body mass | 5 | <0.001 | 0.00 | 16.00 | 26.79 | 6.52 | 0.02 | 0.81 | 0.09 | 40.54 | 51.08 | 4.47 | 0.07 | |
Age at first reproduction+Testes mass+Body mass | 6 | <0.001 | 0.09 | 12.84 | 28.99 | 8.72 | 0.01 | 0.40 | 0.13 | 39.7 | 55.38 | 8.77 | 0.01 | |
Age at first reproduction*Testes mass+Body mass | 7 | <0.001 | 0.17 | 10.18 | 32.87 | 12.60 | 0.00 | <0.001 | 0.31 | 38.18 | 59.92 | 13.31 | 0.00 | |
Artiodactyles(n = 19) | Constant | 3 | 0.65 | 0.00 | 29.86 | 32.12 | 9.54 | 0.01 | <0.001 | 0.00 | 38.64 | 40.90 | 0.00 | 0.60* |
Age at first reproduction | 4 | 0.83 | 0.49 | 16.72 | 22.58 | 0.00 | 0.73* | <0.001 | 0.04 | 36.76 | 42.63 | 1.73 | 0.25 | |
Body mass | 4 | 0.75 | 0.14 | 26.04 | 31.91 | 9.33 | 0.01 | <0.001 | 0.00 | 38.5 | 44.35 | 3.45 | 0.11 | |
Testes mass+Body mass | 5 | 0.74 | 0.16 | 24.32 | 34.19 | 11.61 | 0.00 | <0.001 | 0.00 | 37.16 | 47.03 | 6.13 | 0.03 | |
Age at first reproduction+Testes mass+Body mass | 6 | 0.87 | 0.52 | 13.42 | 24.77 | 2.19 | 0.24 | <0.001 | 0.00 | 35.52 | 49.86 | 8.96 | 0.01 | |
Age at first reproduction*Testes mass+Body mass | 7 | 0.88 | 0.53 | 12.10 | 31.50 | 8.92 | 0.01 | <0.001 | 0.00 | 34.48 | 53.89 | 12.99 | 0.00 |
We compared models based on AICc and wi (see Material and methods section). K represents the number of parameters in the model, R2 corresponds to the adjusted R2 and Δ AICc represents the difference of corrected Akaike’s with that of the best models (*).