Models for Population Growth Curves

Table 2

Contrast of fit to Gompertz (4) with difference equation (5) using residual mean squares.

Source	Gompertz	Difference equation	Ratio
Red deer 6585	4.01	3.5	0.87
Gray seals [1]	68.58	91.91	1.34
Bison [2]	6.34	7.59	1.20
Macaque 6068	1.57	1.5	0.96
Beaver 156	46930	46160	0.98
Elephant seals [3]	62.24	69.86	1.12
Seneca deer [4]	35.4	53.87	1.52
Badger 78	392.7	487	1.24
Gray fox 328	569.8	867.9	1.52
Marten 9695	16850	23060	1.37
Camargue horses [5]	1.84	2.49	1.35
Argentine horses [6]	5.67	8.18	1.44
Przelwalski’s horses [5, 7]	1.4	1.68	1.20
Mean			1.24