Adaptive dynamics of indigenous sheep in Canary Islands, Spain: A machine learning approach.

Autor: Façanha DAE; University of International Integration of Afro-Brazilian Lusophony (UNILAB), Redenção, CE, 62790-790, Brazil., de Assunção MAV; Department of Animal Science, Federal Rural University of the Semi-Arid Region (UFERSA), Mossoró, RN, 59625‑900, Brazil., Ferreira J; Instituto de Zootecnia, Centro de Pesquisa e Desenvolvimento de Zootecnia Diversificada, Nova Odessa, SP, 13380-011, Brazil., Leite JHGM; Department of Animal Science, Federal Rural University of Paraíba (UFPB), Areia, PB, 58397‑000, Brazil., da Silva WST; Department of Animal Science, Federal Rural University of the Semi-Arid Region (UFERSA), Mossoró, RN, 59625‑900, Brazil., Bermejo Asensio LA; Department of Science Universidad de La Laguna - Carretera General do Geneto, San Cristobal de La Laguna, 38200, Santa Cruz de Tenerife, Canary Islands, Spain., de Sousa JER; Department of Animal Science, Federal Rural University of the Semi-Arid Region (UFERSA), Mossoró, RN, 59625‑900, Brazil., Sarries GA; Department of Exact Sciences, 'Luiz de Queiroz' College Agriculture (ESALQ, USP), Piracicaba, Brazil., Silveira RMF; Department of Animal Science,, 'Luiz de Queiroz' College of Agriculture, University of São Paulo (USP), Piracicaba, São Paulo, 13418-900, Brazil. robsonmateusfs1994@gmail.com.
Jazyk: angličtina
Zdroj: International journal of biometeorology [Int J Biometeorol] 2023 Dec; Vol. 67 (12), pp. 2037-2045. Date of Electronic Publication: 2023 Oct 16.
DOI: 10.1007/s00484-023-02560-x
Abstrakt: The objective of the study was to characterize the adaptive profile of Ibero-American sheep of the Canaria breed, evaluating the possible changes in thermoregulatory responses and coat characteristics to which the animals are exposed in the different seasons of the year. Data collected over a period of 12 months were analyzed, with information being observed in the interval of 15 days of each month, in 23 adult ewes kept in an intensive breeding system. The rectal temperature (RT) of Canaria ewes was higher (P < 0.001) in the summer and spring seasons. In contrast, the respiratory rate (RR) of the animals was higher in autumn. The surface temperature (ST) of the herd was lower during the spring. It was observed that the hair length (HL) and the hair density (NH) did not vary during the seasons. However, the hair diameter (HD) and the coat thickness (CT) varied, being in the spring, the season in which the animals had the highest HD and autumn, the season in which they had the lowest. The performance was similar throughout the seasons (P > 0.05). The morphological variables of the coat presented 63.8% of original cases grouped, which may characterize the morphological responses of the coat of these animals as an important trait of the adaptive profile of the breed, whereas the opposite occurred for thermoregulatory responses. The variables most used by the herd and that were most important were autumn (CT, NH, HD, HR, RT, and HL), summer (ST and RR), spring (RR, ST, and RT), and winter (RT, HD, HR, and RR). Sheep of the Canaria breed have an adaptive profile that dynamically uses thermoregulatory and morphological responses, molding themselves according to climate changes resulting from seasonal periods on the Island of Tenerife, Spain. The Canaria sheep stood out for the modification of the morphological characteristics of the coat, especially during autumn and spring, and can be considered an excellent genetic resource with excellent adaptive characteristics for arid environments such as those found in the Canary Islands.
(© 2023. The Author(s) under exclusive licence to International Society of Biometeorology.)
Databáze: MEDLINE
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