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Research article - Peer-reviewed, 2021

Physiological and behavioural responses of Swedish domestic goats and their kids (Capra hircus) to 15 days of heat exposure

Hartmann, E.; Hogberg, M.; Olsson, K.; Dahlborn, K.;

Abstract

Seven Swedish domestic goats (Capra hircus, 2-3 years) and their kids (37 +/- 4 days) were subjected to indoor temperatures above 30 degrees C during 15 days (periods H1-H4; periods without heat C1, C2) to study acclimation. Rectal temperature (RT) increased by 1.1 degrees C during H1 to H3 (P < 0.001 vs. C1), but only by 0.6 degrees C during H4 (P < 0.001 vs. C1; P < 0.024 vs. H1). Respiration rate (RR) increased less during H4 than during H1 (P < 0.001). Skin temperature increased during heat (P < 0.001), and skin evaporation (SE), which differed from C1 to H4 (P < 0.05). Goats increased water intake during heat, resulting in lowered milk osmolality while milk offtake was maintained. Kids' thermoregulatory responses resembled those of the goats. Thus, decreasing RT and RR simultaneously with increasing SE at the end of the heat indicate that goats had started to acclimate.

Keywords

Acclimation; behaviour; environmental heat; goat; milk; temperature

Published in

Acta Agriculturae Scandinavica, Section A - Animal Science

2021, volume: 70, number: 1, pages: 41-49
Publisher: TAYLOR AND FRANCIS AS

Authors' information

Swedish University of Agricultural Sciences, Department of Animal Environment and Health
Högberg, Madeleine
Swedish University of Agricultural Sciences, Department of Anatomy, Physiology and Biochemistry (AFB)
Olsson, Kerstin
Swedish University of Agricultural Sciences, Department of Anatomy, Physiology and Biochemistry (AFB)

UKÄ Subject classification

Animal and Dairy Science

Publication Identifiers

DOI: https://doi.org/10.1080/09064702.2020.1869817

URI (permanent link to this page)

https://res.slu.se/id/publ/110361