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The effects of shade on performance, carcass classes and behaviour of heat-stressed feedlot cattle at the finisher phase

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Abstract

The study aimed to determine the impact of shade on the performance, carcass class and behaviour using 146 crossbred steers and bulls during the finishing phase on a commercial feedlot in February. Treatments were (1) shade and (2) no shade. Average daily gain (ADG), DMI, and feed efficiency were measured, and hot carcass weight (HCW) and grades were collected at slaughter. The proportion of animals within a pen engaged in various behavioural activities (standing, lying, feeding and panting) was recorded. Five randomly selected individual animals per treatment were monitored every 2 min between 0700 and 1600 hours to determine the time spent on each of the above activities. Shade improved the final body weight (P  <  0.0001), ADG (P  =  0.079), and HCW by 8.33 kg (P  <  0.05). Shade increased (P  <  0.05) the feeding activity but decreased (P  <  0.05) panting behaviour. Shade conferred an economic benefit of R2.03 head−1 week−1, and thus would reduce heat stress and increase the feedlot profitability.

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Authors and Affiliations

  1. Crafcor Farming PTY Ltd, Dundee, KwaZulu-Natal, South Africa

    K. L. Blaine

  2. Discipline of Poultry and Animal Science, School of Agricultural Sciences and Agribusiness, University of KwaZulu-Natal, P/Bag X01, Scottsville, Pietermaritzburg, 3209, South Africa

    Ignatius Verla Nsahlai

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  1. K. L. Blaine
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  2. Ignatius Verla Nsahlai
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Correspondence to Ignatius Verla Nsahlai.

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Blaine, K.L., Nsahlai, I.V. The effects of shade on performance, carcass classes and behaviour of heat-stressed feedlot cattle at the finisher phase. Trop Anim Health Prod 43, 609–615 (2011). https://doi.org/10.1007/s11250-010-9740-x

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