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Swine Growth Models—Are They Appropriate?

1985 Swine Program Committee^,2,3,

Abstract

Numerous attempts have been made to model the growth of swine, yet no single model has been widely accepted by the swine industry. Thus, the Swine Program Committee has elected to present a symposium that will hopefully provide direction to future efforts involved with the development of a swine growth model.

In providing that direction let us look briefly at the definition and application of growth models in the swine industry. A model is a series of mathematical equations based on biological responses that are used to predict the physiological response of an animal to a range of nutritional and environmental inputs. Physiological responses in growth models typically involve fat and protein (or lean tissue) accretion, with consideration being given to tissue turnover and maintenance requirements and consideration of the environmental influence on these responses.

The ultimate application of a model is to provide a dynamic approach to economic decision-making.

¹ Respective addresses: Meat and Anim. Sci. Dept., Univ. of Wisconsin, Madison 53706; Dept. of Anim. Sci., Cornell Univ., Ithaca 14853; United Feeds, Inc., Sheridan, IN 46069.

² Appreciation is expressed to the following companies for their financial contribution to partially support this symposium: Cargill Nutrena, Minneapolis, MN; Central Soya, Decatur, IN; Continental Grain Co., Libertyville, IL; and Kent Feeds, Inc., Muscatine, IA.

³ Presented as part of a symposium entitled "Swine Growth Models—Are They Appropriate?" at the 77th Annu. Meet. of the Amer. Soc. of Anim. Sci., Univ. of Georgia, Athens, August 15, 1985. Copies of the discussion session chaired by Dr. M. Tess are available upon request from T. D. Crenshaw.