Your browser doesn't support javascript.
loading
Adaptive integumentary features of beef cattle raised on afforested or non-shaded tropical pastures.
do Nascimento Barreto, Andréa; Jacintho, Manuel Antonio Chagas; Barioni Junior, Waldomiro; Pereira, Alfredo Manuel Franco; Nanni Costa, Leonardo; Zandonadi Brandão, Felipe; Romanello, Narian; Novais Azevedo, Gabriela; Rossetto Garcia, Alexandre.
Afiliación
  • do Nascimento Barreto A; Institute of Veterinary Medicine, Federal University of Pará, Av. dos Universitários, s/n, Castanhal, PA, 68746-360, Brazil.
  • Jacintho MAC; Laboratory of Biotechnology and Animal Reproduction, Brazilian Agricultural Research Corporation (Embrapa), Embrapa Southeast Livestock, Rod. Washington Luiz, km 234, São Carlos, SP, 13560-970, Brazil.
  • Barioni Junior W; Laboratory of Biotechnology and Animal Reproduction, Brazilian Agricultural Research Corporation (Embrapa), Embrapa Southeast Livestock, Rod. Washington Luiz, km 234, São Carlos, SP, 13560-970, Brazil.
  • Pereira AMF; Mediterranean Institute for Agriculture, Environment and Development, Institute for Advanced Studies and Research, Universidade de Évora, Pólo da Mitra, Apartado 94, 7006-554, Évora, Portugal.
  • Nanni Costa L; Department of Agri-Food Science and Technology, University of Bologna, Viale Fanin, 46, 40127, Bologna, Italy.
  • Zandonadi Brandão F; Fluminense Federal University, Rua Vital Brazil, 64, Niterói, RJ, 24230-340, Brazil.
  • Romanello N; School of Veterinary Medicine and Animal Science, University of São Paulo, Av. Duque de Caxias Norte, 255, Pirassununga, SP, 13635-900, Brazil.
  • Novais Azevedo G; Laboratory of Biotechnology and Animal Reproduction, Brazilian Agricultural Research Corporation (Embrapa), Embrapa Southeast Livestock, Rod. Washington Luiz, km 234, São Carlos, SP, 13560-970, Brazil.
  • Rossetto Garcia A; Institute of Veterinary Medicine, Federal University of Pará, Av. dos Universitários, s/n, Castanhal, PA, 68746-360, Brazil. alexandre.garcia@embrapa.br.
Sci Rep ; 14(1): 16951, 2024 07 23.
Article en En | MEDLINE | ID: mdl-39043710
ABSTRACT
We aimed to analyze the seasonal acclimatization process of Nelore and Canchim cattle raised on two production systems (non-shaded, NS, and integrated crop-livestock-forest, ICLF), based on the dynamics of the morphological and functional attributes of the hair coat and skin during winter and summer. The study was conducted in Brazil, in a low-altitude tropical climate region. A completely randomized 2 × 2 factorial design was adopted as follows two production systems (NS and ICLF), two breeds (Nelore and Canchim) in a longitudinal structure, with measurements repeated over time through two stations (winter and summer). The experimental animals consisted of 32 Nelore (Bos indicus) and 32 Canchim (5/8 Bos taurus × 3/8 Bos indicus) bulls. The animals were equally distributed between two intensive rotational grazing systems. In both breeds, the hair coat was significantly thicker in winter but longer in summer, which increased epidermal protection. The Nelore bulls had shorter, wider, and thicker hairs, which are attributes that promote heat loss via conduction. The Canchim bulls showed significantly lower hair density and higher epithelium distance to sweat glands, which resulted in higher core temperature and respiratory rate. In turn, Nelore bulls had higher serum concentrations of triiodothyronine and lower serum concentrations of cortisol. However, Canchim bulls more frequently and intensely activated their thermoregulatory system and markedly adjusted their hair coat and hair features to reduce heat gain, especially in summer. Therefore, the anatomical plasticity and functional integumentary characteristics of Nelore and Canchim bulls reflect their acclimatization to tropical conditions.
Asunto(s)
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Estaciones del Año / Clima Tropical Límite: Animals País/Región como asunto: America do sul / Brasil Idioma: En Revista: Sci Rep Año: 2024 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Estaciones del Año / Clima Tropical Límite: Animals País/Región como asunto: America do sul / Brasil Idioma: En Revista: Sci Rep Año: 2024 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Reino Unido