%0 Journal Article
%A Nascimento, Carolina Cardoso Nagib
%A de França Carvalho Fonsêca, Vinícius
%A de Melo Costa, Cintia Carol
%A Camerro, Leandro Zucheratto
%A Neto, Marcos Chiquitelli
%A Maia, Alex Sandro Campos
%D 2017
%T Respiratory functions and adaptation: an investigation on farm animals bred in tropical environment
%U https://cbbiomet.figshare.com/articles/journal_contribution/Respiratory_functions_and_adaptation_an_investigation_on_farm_animals_bred_in_tropical_environment/5177002
%R 10.6084/m9.figshare.5177002.v1
%2 https://cbbiomet.figshare.com/ndownloader/files/9052384
%K Nellore
%K respiratory rate
%K spirometry
%K Environmental Management
%X To
better understand the physiology responses in adapted breed to tropical environment
this study evaluated the relationship between responses of adaptation and
respiratory functions in ruminants raised in the tropics. Five trials were
conducted for different species/breeds (five Nellore beef cattle, 10 Guzerat
beef cattle, nine Anglo Nubian goats, 12 Jersey dairy cows, and 12 Morada Nova
sheep). An indirect calorimetry system was used with a facial mask adjusted on
the muzzle of the animal. Metabolic heat production (qmet, W kg-1), respiratory
rate (RR, breaths min-1), ventilation (VE, L min-1), tidal volume (VT, L
breath-1), CO2 production (VCO2, L h-1 animal-1), and O2 consumption (VO2, L
h-1 animal-1) were measured simultaneously.
Environmental data, including air temperature, relative humidity, and solar
radiation were recorded from each site. Tidal volume values of 0.01, 0.008,
0.0075, 0.007, and 0.004 L breath-1 kg-1 were found for
Morada Nova sheep, Anglo Nubian goats, and Jersey, Guzerat, and Nellore cattle,
respectively, indicating that tidal volume per unit weight decreased with body
weight wherever Morada Nova Sheep present a higher VO2 consumption
per unid of weight. Indeed, all the
tropical breeding present a lower respiratory rate consequentially an indication of some adaptation.
%I CBBiomet 2017