Table 1. Gonad mass vs. somatic mass by taxon.

effect	n	intercept (95%CL)	slope (95%CL)
intercept		−2.12 (−2.30 – −1.94)
mammals	168	0.41 (0.18 – −0.63)	0.76 (0.82 – 1.06)
birds	97	0.50 (0.18 – 0.83)	0.71 (0.59 – 0.83)
reptiles	3	−0.21 (−1.02 – −0.60)	0.96 (0.0.66–1.25)
amphibians	100	−0.52 (−0.77 – −0.27)	1.27 (1.08 – 1.44)
fishes	98	−0.25 (−0.48 – −0.02)	0.94 (0.82 – 1.06)
invertebrates	16	(zeroed)	0.93 (0.86 – 1.00)

Separate slopes ANCOVA statistics for the relationship between the logarithm of gonad (g) and soma mass (g) by taxon. Significant effects in bold; whole model: r² = 0.91, p<0.0001, F_11,631 = 559.82; F_taxon = 17.78, F_Mi = 156.97.