Produção Nacional
Revisado por pares
Efeito da temperatura ambiente sobre hormônios tireoideanos, temperatura corporal e empenamento de frangos de corte, fêmeas, de diferentes genótipos
2005; Editora da Universidade Estadual de Maringá (Eduem); Volume: 27; Issue: 3 Linguagem: Inglês
10.4025/actascianimsci.v27i3.1216
ISSN1807-8672
AutoresFabiano Dahlke, Elisabeth Gonzáles, Renato Luís Furlan, Adriano Cordeiro Gadelha, Alex Maiorka, Daniel Emygdio de Faria Filho, P. S. Rosa,
Tópico(s)Aquaculture Nutrition and Growth
ResumoThree hundred and sixty female broilers, Cobb – 500 and ISA – Label JA 57 were raised under cold, neutral and hot temperatures in a complete randomized design with 3 x 2 factorial scheme (3 temperatures and 2 strains), with 8 repetitions to evaluate plasmatic levels of Thyroxyne (T4) and Triiodothyronine (T3), body temperature and feathering birds. On hot temperature there was a decrease in T3 levels at 21, 35 and 42 days old and an increase in T4 levels at 21 days old. There was a decrease in the total feathering, in chest, wings and abdomen and an increase in superficial and body temperature. Female broilers ISA Label had better feathering, however lowest superficial temperature, average superficial temperature and body temperature. Environmental temperature affects the feathering of fast growing female broilers, that have low hot tolerance shown through the biggest body temperature. Hormonal levels of T3 and T4 were affected by environmental temperature
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