Growth performance

Growth Performance Response. The consistent net effect of anaboHc steroid implant use in growing mminants appears to be increased rate of protein and Hve weight gain, and increased Hve weight at which carcass or empty body fat concentration equals that in nonimplanted cattie thus increasing their potential mature size. Increased feed intake is frequentiy observed. 

Table 2. Effects of Porcine Somatotropin (pST) Dose on Growth Performance ...

The polyether antibiotics exhibit a broad range of biological, antibacterial, antifungal, antiviral, anticoccidial, antiparasitic, and insecticidal activities. They improve feed efficiency and growth performance in mminant and monogastric animals. Only the anticoccidial activity in poultry and catde, and the effect on feed efficiency in mminants such as catde and sheep are of commercial interest. 

The polyethers have been reported to increase growth performance in monogastric animals such as horses, swine, and rabbits. No commercial use has been approved for swine diets. The sensitivity of horses to the toxic effects of these antibiotics precludes consideration of their use. 

Hyun Y, Ellis M and Johnson R W (1998a), Effects of feeder type, space allowance, and mixing on the growth performance and feed intake pattern of growing pigs , J Anim Sci, 76, 2771-2778. 

Kalavathy R., Abdullah N., Jalaludin S. and Ho Y.W. (2003). Effects of Lactobacillus cultures on growth performance, abdominal fat deposition, serum lipids and weight of organs of broiler chickens . Br Poult Sci, 44, 139-144. 

Two studies (44,63) had shown that growth performance and nitrogen retention efficiency of chicks were severely reduced by the inclusion of raw full fat winged bean seeds at rates of up to 400g/kg in semi-purified diets. Heat treatment of winged beans prior to dietary incorporation results 1n reversal of the growth depression and increases the efficiency of food utilization. 

These investigations show the potential value of full fat winged bean as a broiler feed. However, further studies that define conditions for destruction of anti-nutrients which cause reduced growth performance should be performed. 

Veum, T. L., Ledoux, D. R., Bollinger, D. W., Raboy, V., and Cook, A. (2002). Low-phytic acid barley improves calcium and phosphorus utilization and growth performance in growing pigs. J. Anim. Sci. 80, 2663-2670. 

Antibacterial drugs are used in veterinary practice for two purposes as therapeutics or prophylactics to control clinical disease, and as feed additives to enhance growth performance of animals. The latter practice presumably depends on the antibacterial action of the drug, even though it is used in low, subtherapeutic doses. The effect thus produced is to be distinguished from the action of a true growth promoter, e.g. monensin (63), and will be discussed in detail later (Section 1.08.6.3). Here we shall consider only the therapeutic/prophylactic properties of antibacterial agents. 

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