Abstract

Three nonlinear models, von Bertalanffy, Gompertz and logistic, were fitted to weight- age data for two breeds of rabbits (New Zealand Whites (NZW) and Tan Rabbits (TR)) and their reciprocal crosses (NZW x TR and TR x NZW). Comparisons were made among these models for their suitability to describe the shape of the growth curve in rabbits. The most accurate model was the von Bertalanffy function, followed by the Gompertz and logistic functions. All models consistently underestimated weights at 28, 35, 42, 56 and 140 days. Mature weight, and age and weight at puberty, were fitted the best by the von Bertalanffy curve for all compared genotypes of rabbits, giving estimates of 3523g, 84days, 1044g for NZW; 2785g, 66days, 825g for TR; 3224g, 77days, 957g for NZW x TR; and 3257g, 75days, 965g for TR x NZW.
 

E. Ptak, J. Bieniek, W. Jagusiak

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 19. Selection and quantitative genetics; growth; reproduction; lactation; fish; fiber; meat., , 201–204, 1994
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