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Henrique Mascarenhas NM, Furtado DA, Benício de Souza B, Brilhante de Sousa O, Lima da Costa AN, Feitosa JV, Rodrigues da Silva M, Batista LF, Dornelas KC. Morphology of coat and skin of small ruminants reared in the Brazilian semi-arid region. J Therm Biol 2023; 112:103418. [PMID: 36796883 DOI: 10.1016/j.jtherbio.2022.103418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 09/20/2022] [Accepted: 11/30/2022] [Indexed: 12/03/2022]
Abstract
The structure of the coat and integument of small ruminants reared in semi-arid regions have valuable characteristics that favor their adaptation to the region. The objective of this study was to evaluate the structural characteristics of the coat and integument and sweating capacity of goats and sheep in the Brazilian semi-arid region, using 20 animals, 10 of each breed, 5 males and 5 females of each species, grouped in a completely randomized design in a 2 x 2 factorial scheme (2 species and 2 genders) with 5 replicates. The animals were already being kept under the influence of high temperatures and levels of direct solar radiation before the day of the collections. At the time of the evaluations, ambient temperature was high, with low relative humidity. The pattern of epidermal thickness and sweat glands per body region was superior in sheep (P < 0.05), and the number of hair follicles and sweat rate were similar (P > 0.05) between the species. There was no difference (P > 0.05) in the evaluated characteristics between the genders, showing that they are not influenced by hormones. The morphology of the coat and skin of these animals showed a superiority of goats compared to sheep.
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Affiliation(s)
- Nágela Maria Henrique Mascarenhas
- Postgraduate Program in Agricultural Engineering, Federal University of Campina Grande (UFCG), Road Aprígio Veloso, 882 - Universitário, Campina Grande, PB, 58429-900, Brazil.
| | - Dermeval Araújo Furtado
- Postgraduate Program in Agricultural Engineering, Federal University of Campina Grande (UFCG), Road Aprígio Veloso, 882 - Universitário, Campina Grande, PB, 58429-900, Brazil
| | - Bonifácio Benício de Souza
- Postgraduate Program in Veterinary Medicine, Federal University of Campina Grande (UFCG), Avenue Universitária, s/n - Santa Cecilia, Patos, PB, 58708-110, Brazil
| | - Otávio Brilhante de Sousa
- Postgraduate Program in Veterinary Medicine, Federal University of Campina Grande (UFCG), Avenue Universitária, s/n - Santa Cecilia, Patos, PB, 58708-110, Brazil
| | - Antonio Nelson Lima da Costa
- Federal University of the Cariri (UFCA), Road Vereador Sebastião Maciel Lopes, s/n, São José, Crato, CE, 63133-610, Brazil
| | - José Valmir Feitosa
- Federal University of the Cariri (UFCA), Road Vereador Sebastião Maciel Lopes, s/n, São José, Crato, CE, 63133-610, Brazil
| | - Maycon Rodrigues da Silva
- Postgraduate Program in Veterinary Medicine, Federal University of Campina Grande (UFCG), Avenue Universitária, s/n - Santa Cecilia, Patos, PB, 58708-110, Brazil
| | - Luanna Figueiredo Batista
- Postgraduate Program in Veterinary Medicine, Federal University of Campina Grande (UFCG), Avenue Universitária, s/n - Santa Cecilia, Patos, PB, 58708-110, Brazil
| | - Karoline Carvalho Dornelas
- Postgraduate Program in Agricultural Engineering, Federal University of Campina Grande (UFCG), Road Aprígio Veloso, 882 - Universitário, Campina Grande, PB, 58429-900, Brazil; Federal University of the Mato Grosso (UFMT), Avenue Alexandre Ferronato, 1200 - Res. Cidade Jardim, Sinop, MT, 78550-728, Brazil
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de Amorim MLCM, Saraiva EP, de França Carvalho Fonsêca V, Guerra RR, Dos Santos SGCG, de Melo Costa CC, Almeida MEV, da Costa Pinheiro A, Pimenta Filho EC. Coat and skin morphology of hair sheep breeds in an equatorial semi-arid environment. J Therm Biol 2019; 84:103-110. [PMID: 31466742 DOI: 10.1016/j.jtherbio.2019.06.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 04/27/2019] [Accepted: 06/03/2019] [Indexed: 11/28/2022]
Abstract
This study aims to address if are there annual changes in the hair coat traits and skin morphology of hair sheep breeds raised in an equatorial semi-arid region? Coat and skin samples were taken from thirty Morada Nova (4 ± 2 years old; red coat; ±SD) and twenty Santa Inês multiparous ewes (5 ± 2 years old; brown and black coat; ±SD) every 3 months over a year. Hair coat traits included thickness (mm), density (number of hairs cm-2), length (mm), and diameter (mm), plus epidermal and dermal thickness (μm), sweat glands and blood capillaries area (μm cm-2) were determined. Means of solar irradiance and ambient air temperature were higher between September and December. Annual changes (P < 0.05) in hair density, diameter, length and thickness, as well as the skin blood capillaries and sweat gland area differed between breeds. The modifications on hair coat traits resulted in minor changes on the effective thermal conductivity of the hair coat surface both for Morada Nova and Santa Ines sheep. Nevertheless, it was clearly evident that the overall cutaneous thermal insulation for Morada Nova sheep was lowest in September that was coupled with lower hair density, coat thickness, and higher sweat gland and blood capillary area (P < 0.05). In conclusion, even in an equatorial region, phenotypic acclimatization on morphological traits of cutaneous surface and skin traits can modify the overall thermal insulation of sheep breeds.
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Affiliation(s)
| | - Edilson Paes Saraiva
- Animal Biometeorology and Ethology Group (BIOET), Federal University of Paraiba, Areia, Brazil
| | - Vinicius de França Carvalho Fonsêca
- Animal Biometeorology and Ethology Group (BIOET), Federal University of Paraiba, Areia, Brazil; Innovation Group of Animal Biometeorology (INOBIO-MANERA), São Paulo State University, Jaboticabal, Brazil; Brain Function Research Group (BFRG), School of Physiology, University of the Witwatersrand, Johannesburg, South Africa.
| | | | | | - Cíntia Carol de Melo Costa
- Innovation Group of Animal Biometeorology (INOBIO-MANERA), São Paulo State University, Jaboticabal, Brazil
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