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Is body surface temperature measured on the single lambs’ back a reliable indicator of the Ewe-lamb bond around birth?
Journal of Thermal Biology ( IF 2.7 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.jtherbio.2020.102699
Ophélie Menant 1 , Rodolfo Ungerfeld 1 , Raquel Pérez-Clariget 2 , Aline Freitas-de-Melo 1
Affiliation  

In extensive sheep production systems, most of the lambs' deaths are related to their low vitality at birth, and an inadequate ewe-lamb bond, leading to lambs' hypothermia. In this context, the aim of this study was to determine if lambs' rectal and body surface temperatures were related to the ewes and lambs behaviours at birth and during a separation-reunion test performed 24-36 h later. Rectal and body surface temperatures of lambs were recorded using a digital thermometer and an infrared thermal camera, respectively, and were related to several ewe and lamb behaviours. Rectal temperature was inversely related to the duration of the first suckling at birth. As for lambs' weight, body surface temperatures recorded at birth were inversely related to its latency to suckle for the first time. Body surface temperatures recorded during a separation-reunion test were positively related to the ewe-lamb distance during it. Body surface temperature recorded at birth was negatively related to behaviours recorded during the separation-reunion test, such as the number of lamb vocalizations, the ewe-lamb distance and the latency to suckle after the ewe-lamb separation. Body surface temperatures were greater after the separation-reunion test than at birth. We concluded that lambs' body surface temperatures seem to be indicators of the lambs' vitality at birth and of the strength of the ewe-lamb bond measured one day after birth.

中文翻译:

在单只羔羊的背上测量的体表温度是否是出生前后母羊羔债券的可靠指标?

在粗放型绵羊生产系统中,大部分羔羊的死亡与出生时的低活力以及母羊与羔羊的结合不足,导致羔羊体温过低有关。在这种情况下,本研究的目的是确定羔羊的直肠和体表温度是否与母羊和羔羊出生时和 24-36 小时后进行的分离-团聚测试期间的行为有关。分别使用数字温度计和红外热像仪记录羔羊的直肠和体表温度,并与几种母羊和羔羊的行为有关。直肠温度与出生时第一次哺乳的持续时间呈负相关。至于羔羊的体重,出生时记录的体表温度与其第一次吸奶的潜伏期成反比。在分离-重聚测试期间记录的体表温度与母羊-羔羊的距离呈正相关。出生时记录的体表温度与分离 - 重聚测试期间记录的行为呈负相关,例如羔羊发声的数量,母羊与羔羊的距离以及母羊与羔羊分离后的哺乳潜伏期。分离-重聚测试后的体表温度高于出生时。我们得出结论,羔羊的体表温度似乎是羔羊出生时活力的指标,也是出生后一天测量的母羊与羔羊结合强度的指标。例如羔羊发声的次数、母羊与羔羊的距离以及母羊与羔羊分离后吸奶的潜伏期。分离-重聚测试后的体表温度高于出生时。我们得出结论,羔羊的体表温度似乎是羔羊出生时活力的指标,也是出生后一天测量的母羊与羔羊结合强度的指标。例如羔羊发声的次数、母羊与羔羊的距离以及母羊与羔羊分离后吸奶的潜伏期。分离-重聚测试后的体表温度高于出生时。我们得出结论,羔羊的体表温度似乎是羔羊出生时活力的指标,也是出生后一天测量的母羊与羔羊结合强度的指标。
更新日期:2020-10-01
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