Desempenho e Parâmetros Fisiológicos de Quatro Raças de Frangos de Crescimento Lento.

Abstract

The objective is to evaluate the performance and physiological parameters of four chicken breeds of slow growth: Pescoço Pelado, Pesadão Vermelho, Carijó e Hisex Brown, and 30 birds of each race, distributed in metallic cages composed five floors. The experiment was conducted at the shed of of aviculture in School of Medicine Veterinary and Animal Science in University Federal in the Tocantins in the period from 30 May to 27 June 2016, and was evaluated the uniformity, feed intake (FI), weight gain (WG), feed conversion (FC), final body weight at 28 days, and physiological parameters, head temperature, back, cinnamon and rectal derteminar to average skin temperature and mean body. Chickens and ration were weighed for the calculation of feed intake, weight gain and feed conversion. The weekly body weight was obtained through the individual weighing and physiological parameters were obtained with the use of infra red and digital thermometer. About uniformity, there was a reduction over the trial period, where only the initial weight showed good uniformity, 90%. The Pescoço Pelado had higher values for weekly body weight at 21 and 28 days and lower rectal temperature and body 14 days, and efficient for meat production with great adaptability, and a larger area for heat dissipation compared to other evaluated. Once the choice of the lineage by the producer will depend on the niche market, consumer demand, production target, environmental variables and available resources in the region.