Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/22379
Title: Infrared thermal imaging as a method to evaluate heat loss in newborn lambs
Contributor(s): Labeur, L (author); Villiers, G (author); Small, A H (author); Hinch, Geoffrey (author)orcid ; Schmoelzl, Sabine (author)
Publication Date: 2017
DOI: 10.1016/j.rvsc.2017.09.023
Handle Link: https://hdl.handle.net/1959.11/22379
Abstract: Thermal imaging technology has been identified as a potential method for non-invasive study of thermogenesis in the neonatal lamb. In comparison to measurement of the core body temperature, infrared thermography may observe thermal loss and thermogenesis linked to subcutaneous brown fat depots. This study aimed to identify a suitable method to measure heat loss in the neonatal lamb under a cold challenge. During late pregnancy (day 125), ewes were subjected to either shearing (n = 15) or mock handling (sham-shorn for 2 min mimicking the shearing movements) (n = 15). Previous studies have shown an increase in brown adipose tissue deposition in lambs born to ewes shorn during pregnancy and we hypothesized that the shearing treatment would impact thermoregulatory capacities in newborn lambs. Lambs born to control ewes (n = 14; CONTROL) and shorn ewes (n = 13; SHORN) were subjected to a cold challenge of 1 h duration at 4 h after birth. During the cold challenge, thermography images were taken every 10 min, from above, at a fixed distance from the dorsal midline. On each image, four fixed-size areas were identified (shoulder, mid loin, hips and rump) and the average and maximum temperatures of each recorded. In all lambs, body surface temperature decreased over time. Overall the SHORN lambs appeared to maintain body surface temperature better than CONTROL lambs, while CONTROL lambs appeared to have higher core temperature. At 30 min post cold challenge SHORN lambs tended to have higher body surface temperatures than lambs (P = 0.0474). Both average and maximum temperatures were highest at the hips. Average temperature was lowest at the shoulder (P < 0.05), while maximum temperatures were lowest at both shoulder and rump (P < 0.005). These results indicate that lambs born to shorn ewes maintained their radiated body surface temperature better than CONTROL lambs. In conjunction with core temperature changes under cold challenge, this insight will allow us to understand whether increased body surface temperature contributes to increased overall heat loss or whether increased body surface temperature is indeed a mechanism contributing to maintenance of core body temperature under cold challenge conditions. This study has confirmed the utility of infrared thermography images to capture and identify different levels of thermoregulatory capacity in newborn lambs.
Publication Type: Journal Article
Source of Publication: Research in Veterinary Science, v.115, p. 517-522
Publisher: Elsevier Ltd
Place of Publication: United Kingdom
ISSN: 0034-5288
1532-2661
Field of Research (FOR): 070206 Animal Reproduction
070207 Humane Animal Treatment
070203 Animal Management
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
Statistics to Oct 2018: Visitors: 9
Views: 12
Downloads: 0
Appears in Collections:Journal Article

Files in This Item:
2 files
File Description SizeFormat 
Show full item record

Page view(s)

76
checked on Dec 29, 2018
Google Media

Google ScholarTM

Check

Altmetric

SCOPUSTM   
Citations

 

WEB OF SCIENCETM
Citations

 

Items in Research UNE are protected by copyright, with all rights reserved, unless otherwise indicated.