Locally adapted goats efficiently gain and lose heat in an equatorial semi-arid environment

The aim of this study was to gain insights in respect to how locally adapted goats exhibit dynamic body heat in an equatorial semi-arid environment. Ten Canindé goats were used in the study (22.90 ± 2.70 kg). Respiratory rate ( R R ; min breaths −1 ), rectal temperature ( R T ; °C) and sweating rate...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:International journal of biometeorology 2020-10, Vol.64 (10), p.1777-1782
Hauptverfasser: Ferreira, Josiel, Silveira, Robson Mateus Freitas, de Sousa, José Ernandes Rufino, Façanha, Débora Andréa Evangelista
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:The aim of this study was to gain insights in respect to how locally adapted goats exhibit dynamic body heat in an equatorial semi-arid environment. Ten Canindé goats were used in the study (22.90 ± 2.70 kg). Respiratory rate ( R R ; min breaths −1 ), rectal temperature ( R T ; °C) and sweating rate ( S R ; g m −2  h −1 ) were measured for 8 days, once a week, for 8 consecutive weeks in each animal, with collection intervals of 1 h throughout the day (24 h), together with the meteorological variables. Air temperature ( A T , °C) and relative humidity ( R H , %) were measured, and then, the temperature humidity index ( T HI ) was calculated. First, we determined 2 days with stressful climatic conditions and similar environmental characteristics (day 1 and 2) among the 8 experimental days. The R T was evaluated on these 2 days using the means of each hour as the cut-off point, and determining whether the animals are efficient (EF) or inefficient (INEF) in heat loss (β 1 ) and gain (β 2 ). The R T was separated in β 1 and β 2 for 24 h, setting times to obtain the angular coefficients (β) for both. The days with stressful climatic conditions and similar environmental characteristics were day 1 and 2. The hours in which the Canindé goats gained and lost heat were respectively 11 a.m. to 3 p.m. and from 4 p.m. to 10 a.m. The animals classified as EF lost more or equal the amount of heat represented for R T . When the mean of all animals was evaluated for efficiency in heat control, the flock was classified as EF. Differences ( P  
ISSN:0020-7128
1432-1254
DOI:10.1007/s00484-020-01959-0