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Leite da Silva WA, Poehland R, Carvalho de Oliveira C, Ribeiro Ferreira MGC, Garcia de Almeida R, Cáceres MBS, Macedo GG, da Costa E Silva EV, Alves FV, Nogueira E, de Andrade Melo-Sterza F. Shading effect on physiological parameters and in vitro embryo production of tropical adapted Nellore heifers in integrated crop-livestock-forest systems. Trop Anim Health Prod 2020; 52:2273-2281. [PMID: 32144659 PMCID: PMC7426302 DOI: 10.1007/s11250-020-02244-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 02/17/2020] [Indexed: 01/26/2023]
Abstract
The aim of this study was to evaluate the impact of increased shadow supply in integrated crop-livestock-forest systems on in vitro embryonic development and physiological parameters related to stress response in Nellore heifers (Bos indicus). For the study, animals (n = 16) were randomly divided into two groups and kept in areas with different afforestation systems, the integrated crop-livestock-forest (ICLF) and the integrated crop-livestock (ICL) system. The microclimate of the ICLF system provided better comfort conditions than ICL. No differences of respiratory rate, rectal temperature, cortisol, T3, T4, oocyte quality, and cleavage rate between the systems were verified. A higher blastocyst rate was observed in the ICLF (p < 0.05). The results demonstrate that Nellore heifers managed in ICLF during summer in Midwest of Brazil showed higher production of in vitro embryos, without typical changes in its physiological parameters. The results observed in the present study indicate that zebu females are able to respond satisfactorily to the intense heat conditions; however, we believe that the long period to which these animals are exposed to these conditions interferes in the oocyte competence and embryo development.
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Affiliation(s)
| | - Ralf Poehland
- Leibniz Institute for Farm Animal Biology, Institute of Reproductive Biology, Dummerstorf, Germany
| | | | | | - Ricardo Garcia de Almeida
- Veterinary Sciene, Federal University of Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
| | | | - Gustavo Guerino Macedo
- Veterinary Sciene, Federal University of Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
| | | | - Fabiana Villa Alves
- Brazilian Agricultural Research Corporation, EMBRAPA Beef Cattle, Campo Grande, Brazil
| | - Eriklis Nogueira
- Veterinary Sciene, Federal University of Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil
- Brazilian Agricultural Research Corporation, EMBRAPA Pantanal, Corumbá, Brazil
| | - Fabiana de Andrade Melo-Sterza
- Animal Science, State University of Mato Grosso do Sul, Aquidauana, Mato Grosso do Sul, Brazil.
- Leibniz Institute for Farm Animal Biology, Institute of Reproductive Biology, Dummerstorf, Germany.
- Veterinary Sciene, Federal University of Mato Grosso do Sul, Campo Grande, Mato Grosso do Sul, Brazil.
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Follicular size, luteinizing hormone (LH), and progesterone (P4) levels in postpartum Santa Inês ewes subjected to ram effect combined with suckling interruption. Livest Sci 2018. [DOI: 10.1016/j.livsci.2018.05.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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