Ewe lamb vaginal temperatures in hardwood silvopastures

Pent, Gabriel J.; Fike, John H.; Kim, In-Young

doi:10.1007/s10457-018-0221-y

Cited by 21 publications

(25 citation statements)

References 22 publications

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“…Device developed to monitor vaginal temperature automatically in sheep where, (a) a blank CIDR is modified to house the temperature logger, (b) dimensions of the temperature logger, (c) an opening is made and the temperature logger is inserted just before the junction of the two arms, and (d) the temperature logger and whole device is sealed with Super 33 + vinyl electrical tape. As described by Pent et al [51] alterations. An important consideration with VT devices is the changes in uterine and vaginal blood flows which occur at different stages of reproduction [52].…”

Section: Rectal and Vaginal Probesmentioning

confidence: 92%

“…An extremely high correlation, as well as a clear response of both devices to lipopolysaccharide (LPS) administration, which is used to stimulate an immune response, was found when comparing the use of rectal and vaginal probes in beef heifers [16]. More recently in ewe-lambs, VT sensors were effective in measuring body temperature under grazing conditions, as well as determining shade use and the effects of various tree species on animal physiology [51] ( Fig. 1).…”

Section: Rectal and Vaginal Probesmentioning

confidence: 99%

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Technologies for the automated collection of heat stress data in sheep

et al. 2021

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The automated collection of phenotypic measurements in livestock is becoming increasingly important to both researchers and farmers. The capacity to non-invasively collect real-time data, provides the opportunity to better understand livestock behaviour and physiology and improve animal management decisions. Current climate models project that temperatures will increase across the world, influencing both local and global agriculture. Sheep that are exposed to high ambient temperatures experience heat stress and their physiology, reproductive function and performance are compromised. Body temperature is a reliable measure of heat stress and hence a good indicator of an animals’ health and well-being. Non-invasive temperature-sensing technologies have made substantial progress over the past decade. Here, we review the different technologies available and assess their suitability for inferring ovine heat stress. Specifically, the use of indwelling probes, intra-ruminal bolus insertion, thermal imaging and implantable devices are investigated. We further evaluate the capacity of behavioural tracking technology, such as global positioning systems, to identify heat stressed individuals based on the exhibition of specific behaviours. Although there are challenges associated with using real-time thermosensing data to make informed management decisions, these technologies provide new opportunities to manage heat stress in sheep. In order to obtain accurate real-time information of individual animals and facilitate prompt intervention, data collection should be entirely automated. Additionally, for accurate interpretation on-farm, the development of software which can effectively collect, manage and integrate data for sheep producer’s needs to be prioritised. Lastly, understanding known physiological thresholds will allow farmers to determine individual heat stress risk and facilitate early intervention to reduce the effects in both current and subsequent generations.

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Section: Rectal and Vaginal Probesmentioning

confidence: 92%

Section: Rectal and Vaginal Probesmentioning

confidence: 99%

Technologies for the automated collection of heat stress data in sheep

et al. 2021

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“…The paper by Cardozo-Herrán et al (2020), in this special issue, evaluated the productivity of lactating goats in México, under a native vegetation grazing system, a grass monoculture system and an intensive silvopastoral system based on tanzania grass (Megatyrsus maximus) and leucaena srubs. Another paper by Pent et al (2020b), reported results obtained in the United States of America, in hardwood silvopastures, using Juglans nigra and Gleditsia triacanthos trees on a tall fescue (Schedonorus arundinaceous) pasture. Both ancient and intensive silvopastoral systems, spread across continents, using different management grazing practices and animal species, illustrate a wide array of possible combinations available for an integrated, sustainable land use approach.…”

Section: Different Silvopastoral Systems As Diversified Solutions Formentioning

confidence: 99%

“…Among the several welfare benefits reviewed by Broom (2017), the improvement in levels of nutrition (Murgueitio et al 2011), health (Tarazona Morales et al 2017, comfort (Mancera and Galindo 2011), and reduction of fear (Ocampo et al 2011) are highlighted. In this special issue, the work by Pent et al (2020b) underlined the importance of trees to moderate the impact of environmental conditions on sheep body temperatures. Using intravaginal temperature sensors, they found significant differences between animals grazing in open pastures and those benefiting from tree shade.…”

Section: Positive Outcomes Of Silvopastoral Systemsmentioning

confidence: 99%

Grazing in silvopastoral systems: multiple solutions for diversified benefits

Sales-Baptista

Ferraz-de-Oliveira

2021

Agroforest Syst

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“…One cited benefit of silvopasture is the provision of shade to livestock during the summertime ( Orefice et al, 2017 ). Sheep in silvopastures have lower core body temperatures than sheep in open pastures during the afternoon ( Pent et al, 2018 ). Heat load may change activities and intensify stresses experienced by animals in open pastures, thus, increasing time and energy spent in behaviors to stabilize body temperature.…”

Section: Introductionmentioning

confidence: 99%

Lamb performance in hardwood silvopastures, II: animal behavior in summer1

Pent

Greiner

Munsell

et al. 2019

Translational Animal Science

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Integrating trees into pastures, a practice known as silvopasture, may benefit livestock in the summertime through the provision of shade. The purpose of this project was to compare the behavioral patterns of sheep grazing in silvopastures and open pastures. Black walnut (Juglans nigra L.) and honeylocust (Gleditisia triacanothose L.) based silvopasture systems were compared with open pastures in a randomized complete block design with three blocks over two summers. Behavior measures were recorded within a replicate within a week, and these measures were taken sequentially within three experimental periods. Ewe lambs (n = 3) within each experimental unit were equipped with a wideband audio-recording device to detect prehension events. Time-lapse cameras documented sheep behavior every 60 s. In the silvopastures, the lambs spent over 90% of daylight hours within shade from trees. Lambs in silvopastures spent more time lying down than animals in the open pastures (P ≤ 0.01), while lambs in the open pastures spent more than 2 h longer each day standing (P < 0.0001). Lambs in the black walnut silvopastures spent more time grazing (488 ± 14 min · d−1) than lambs in the honeylocust silvopastures (438 ± 14 min · d−1; P = 0.0493) and lambs in the open pastures (417 ± 14 min · d−1; P = 0.0026). There was no difference in grazing time for lambs in the latter two systems (P = 0.5597). Spectral analysis of the imagery revealed that the lambs in the black walnut silvopastures grazed more frequently than the lambs in the other systems for both years. The acoustic analysis, though limited by recorder durability to 47 complete recordings, revealed no difference in total bites taken per day (P ≥ 0.7222) or in the morning (P ≥ 0.2069), afternoon (P ≥ 0.5816), and evening periods (P ≥ 0.9337). Silvopastures provide an opportunity to improve lamb comfort in the summer.

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Ewe lamb vaginal temperatures in hardwood silvopastures

Cited by 21 publications

References 22 publications

Technologies for the automated collection of heat stress data in sheep

Technologies for the automated collection of heat stress data in sheep

Grazing in silvopastoral systems: multiple solutions for diversified benefits

Lamb performance in hardwood silvopastures, II: animal behavior in summer1

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