Physiological responses of caprines raised under different types of covering

Abstract

Thermal discomfort inside facilities is one of the factors responsible for low productivity of caprines in the Brazilian Northeast region, because inadequate weather conditions can cause elevated rectal temperature, increased respiratory rate, decreased food ingestion and reduced production. The present paper aimed to study the behavior of physiological thermoregulation of the animals (respiratory rate -RR and rectal temperature -RT) at four different times of the day (8 a.m., 11 a.m., 2 p.m. and 5 p.m.) and their relation to bioclimatic indexes (Temperature Humidity Index -THI, Black Globe Humidity Index -BGHI and Radiant Heat Load -RHL) in order to determine whether the type of covering used in the animals facilities (ceramic covering -CC, asbestos cement covering -AC and straw covering -SC) interferes with the physiology of thermoregulation. The time of data collection was related to the values of environmental and physiological variables. At 2 p.m. it was found the highest values of Radiant Heat Load on the three types of covering. The values of RT and RR were higher at 11 a.m. and 2 p.m., and the straw tile provided better thermal conditions of microclimate for the animals. The increased RR maintained the caprines homeothermy.

Thermal behavior of alternative materials used as roof and efficiency of the reflective painting on the external face

“…For EST previously used asbestos as a raw material [7]. Despite the ban on the production of tiles and other asbestos-containing materials, in some regions of Brazil, it is possible to find asbestos cement, being common to find recent research involving the use of this material [8][9][10]. In Brazil, the State of Goiás is the main extractor of asbestos fiber, extracted at the mine located in the Municipality of Minaçu [11][12][13].…”

Use of Infrared Thermography for Identifying Physiological and Hematological Conditions of Young Sapera Dairy Goats

“…Tyler & Ensminger (2006) report that heat-resistant animals can preserve their body temperatures in a normal range without changing their physiological and productivity status. Goat is a homeothermic animal which can control its body temperature constantly, even in an extreme environmental condition, and can adapt better to the hot environment than other animals (Kawabata et al 2013;Naandam & Kojo 2014;Hasin et al 2017;Ribeiro et al 2018;Façanha et al 2020).…”