Euclidean distance: integrated criteria to study sheep behaviour under heat stress

Serrano, Jorge Orlay; Villares, Asiel; Manuel-Malamba, Francisco Dongo; Martínez-Melo, Jorge; Mazorra, Carlos; Borroto, Angela; Hajari, Elliosha; Fonseca-Fuentes, Norge; Lorenzo, José Carlos

doi:10.15835/nsb13110859

Cited by 9 publications

(3 citation statements)

References 25 publications

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“…Nas regiões tropicais e subtropicais vem ocorrendo um crescimento da atividade agropecuária em termos de produção e produtividade, contudo, devido ao aquecimento global, o rendimento tende a baixar em até 20% (Jones e Thornton, 2013) até o ano 2050, o que provocará efeitos negativos na produtividade agropecuária, que é afetada diretamente pelas alterações meteorológicas (SERRANO et al, 2021).…”

Section: Introductionunclassified

Uso dos índices ambientais e de conforto térmico nas avaliações da termorregulação de ovinos em regiões tropicais

Silva,

Souza,

Carvalho

et al. 2023

coopex

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Resumo – O objetivo deste trabalho foi descrever os métodos que têm sido utilizados para avaliar a termorregulação em ovinos, enfatizando a relação entre índices de conforto térmico (ITGU e ITU) e variáveis em regiões de clima tropical. O levantamento dos dados foi realizado por meio de busca em bases de dados renomadas, como “Scopus”, “Scielo”, “Pubmed”, “Web of Science”, “Embase” e “Directory of open access journals”, nas dependências da Laboratório de Bioclimatologia da Universidade Federal de Campina Grande (UFCG - CSTR). Eles foram selecionados com os seguintes descritores: “sheep” (ovelha), “thermal stress” (thermal stress) e “physiological answers” (respostas fisiológicas), considerando estudos publicados em inglês e português a partir do ano de 2011 de acordo com os critérios de inclusão e exclusão pré-estabelecida. De um total de 66 artigos, 18 foram selecionados por atenderem aos critérios de inclusão e exclusão, que levam em consideração: ano de publicação, espécie ovina, ambiente com altas temperaturas e utilização dos índices ITGU e ITU associados à resposta termorreguladora. Observou-se a utilização de métodos semelhantes para relacionar os índices de conforto térmico com as respostas fisiológicas, sendo o ITGU o mais utilizado pelos autores, seguido do ITU. Houve relação entre os altos índices e alterações fisiológicas, principalmente aumentos na FR indicando estresse térmico. Em outras situações, mesmo que o ambiente tenha sido apontado como altamente estressante, as ovelhas conseguiram manter a homeotermia. Destacou-se a necessidade de mais pesquisas para estabelecer e adaptar índices de conforto térmico específicos para ovinos criados em regiões de clima tropical.

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Section: Introductionunclassified

Uso dos índices ambientais e de conforto térmico nas avaliações da termorregulação de ovinos em regiões tropicais

Silva,

Souza,

Carvalho

et al. 2023

coopex

View full text Add to dashboard Cite

show abstract

“…Water is essential for life, and animal welfare is strongly dependent on a stable supply of this resource (Serrano et al 2021a;Serrano et al 2021c;Serrano et al 2021b). In the context of livestock farming, it is known that sheep and goats display greater resilience to unfavorable environmental conditions than cattle (Louw 1984;Silanikove and Koluman 2015).…”

Section: Introductionmentioning

confidence: 99%

Impacts of short-term water restriction on Pelibuey sheep: physiological and blood parameters

Serrano

Villares-Garachana

Correa-Herrera

et al. 2022

Trop Anim Health Prod

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One of the projected effects of climate change is a reduction in rainfall in certain regions of the world.Hence, the agricultural and livestock sectors will have to cope with increasing incidences of water shortage whilst still maintaining productivity levels to feed an ever increasing global population. This short communication reports on the effect of a two week water stress on Pelibuey sheep in Cuba. Three treatments were compared viz. supply of water ad libitum; water supplied once every 3 or 6 d. Following exposure to the water stress, the results showed no changes in sheep body weight or rectal temperature. However, respiration frequency was affected with water stress causing a reduction from 23.3 to 13.3 respirations per min in control and water deprived animals, respectively. Furthermore, there was evidence for hemoconcentration in response to water stress (levels of hemoglobin increased from 9.2 to 13.1 g L -1 and hematocrits from 27.6 to 39.3% in the control group and animals restricted to water once every 6 d.The imposed water stress was also evident in the reduction of lymphocytes (from ±63 to 43%), and in increase of neutrophils (from approximately 38 to 54%) and leukocytes (from 3133 to 4933 per mm 3 ).The results indicated a decline in the levels of antioxidants, i.e. SOD (SOD from approximately 13 to 10 U mg -1 protein and CAT activity from 23 to 9 U mg -1 protein. To the best of our knowledge, this is the rst report on the response of Pelibuey sheep to short-term water shortage stress under Cuban environmental conditions.

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“…As mentioned above, conservation of sheep genetic resources is critical to ensure that a diverse gene pool is available to have access to existing breeds, or develop new ones, that can tolerate emerging pests, diseases and altered environmental conditions [2,3,4,5,6]. This is particularly important when the effects of climate change (increasing temperature) are considered in the context of sheep farming.…”

Section: Introductionmentioning

confidence: 99%

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2021

World J. Adv. Pharm. Life Sci.

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Sheep farming, and the income generated from this endeavor, contributes significantly to the global economy and rural livelihoods. Therefore, it is vital to maintain the productivity of this industry in the face of changing climate patterns. In the context of sheep farming, animals are exposed to a higher heat load as global temperatures are increasing, leading to heat stress. This heat stress conditions can adversely affect animal productivity and welfare resulting in reduced feed intake, physiological (panting, higher respiration, higher heart rate, etc.) and behavioral changes (lying down, standing, seeking shade, etc.) to compensate for increased heat load ultimately leading to lowered productivity. Considering this, it is important to monitor sheep behavior in order to implement improved management practices to compensate for changes in climate. The current short study investigated sheep behavior at different times throughout the day. The data generated was analyzed using the hierarchical cluster analysis method in order to integrate all variables into a single representative dendrogram that could summarize sheep behavior. While hierarchical cluster analysis has been applied in diverse scientific fields, as far as we know, the statistical application reported here is novel in the context of sheep behavior in response to climate change. We studied sheep behavior throughout the day (

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Euclidean distance: integrated criteria to study sheep behaviour under heat stress

Cited by 9 publications

References 25 publications

Uso dos índices ambientais e de conforto térmico nas avaliações da termorregulação de ovinos em regiões tropicais

Uso dos índices ambientais e de conforto térmico nas avaliações da termorregulação de ovinos em regiões tropicais

Impacts of short-term water restriction on Pelibuey sheep: physiological and blood parameters

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