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Metadados | Descrição | Idioma |
---|---|---|
Autor(es): dc.contributor | Universidade Estadual Paulista (Unesp) | - |
Autor(es): dc.contributor | Univ Fed Sul & Sudeste Para | - |
Autor(es): dc.contributor | Ohio State Univ | - |
Autor(es): dc.contributor | Univ New England | - |
Autor(es): dc.creator | Souza, A. P. [UNESP] | - |
Autor(es): dc.creator | St-Pierre, N. R. | - |
Autor(es): dc.creator | Fernandes, M. H. M. R. [UNESP] | - |
Autor(es): dc.creator | Almeida, A. K. [UNESP] | - |
Autor(es): dc.creator | Vargas, J. A. C. [UNESP] | - |
Autor(es): dc.creator | Resende, K. T. [UNESP] | - |
Autor(es): dc.creator | Teixeira, I. A. M. A. [UNESP] | - |
Data de aceite: dc.date.accessioned | 2022-02-22T00:16:03Z | - |
Data de disponibilização: dc.date.available | 2022-02-22T00:16:03Z | - |
Data de envio: dc.date.issued | 2020-12-10 | - |
Data de envio: dc.date.issued | 2020-12-10 | - |
Data de envio: dc.date.issued | 2019-12-31 | - |
Fonte completa do material: dc.identifier | http://dx.doi.org/10.3168/jds.2018-15930 | - |
Fonte completa do material: dc.identifier | http://hdl.handle.net/11449/197618 | - |
Fonte: dc.identifier.uri | http://educapes.capes.gov.br/handle/11449/197618 | - |
Descrição: dc.description | The aim of this study was to investigate the effects of sex on the requirements for maintenance and efficiency of energy utilization in growing Saanen goats. A database from 7 comparative slaughter studies that included 238 Saanen goats was gathered to provide information for the development of prediction equations of energy requirements for maintenance and efficiency of energy utilization. The experimental design provided different levels of metabolizable energy intake (MEI) and empty body weight (EBW). The data were analyzed so that sex (e.g., intact males, castrated males, and females; n = 98, 80, and 60, respectively) was a fixed effect, and blocks nested in the studies and goat sex were random effects. For the development of linear and nonlinear equations, we used the MIXED and NLMIXED procedures in SAS (SAS Institute Inc., Cary, NC). Nonlinear regression equations were developed to predict heat production (HP, kcal/kg(0.75) of EBW; dependent variable) from MEI (kcal/kg(0.75) of EBW; independent variable). Using the comparative slaughter technique, the net energy requirement for maintenance (NEM) was calculated as the value of HP at MEI equal to zero. Additionally, NEM was evaluated based on the degree of maturity. The metabolizable energy requirement for maintenance was calculated as the value at which HP is equal to MEI. Efficiency of ME utilization for maintenance (k(m)) was calculated as the ratio between NEM and the metabolizable energy requirement for maintenance. Efficiency of energy utilization for growth (k(g)) was assumed to be the slope of the linear regression of retained energy (RE) on MEI above the maintenance stage (model intercept equal to 0). Efficiencies of RE as protein (k(p)) and as fat (k(f)) were calculated using the multiple linear regression of MEI above the maintenance (model intercept equal to 0) on RE as protein and as fat, respectively. Sex affected NEm (75.0 +/- 1.76 kcal/kg(0.)(75) of EBW for males and 63.6 +/- 2.89 kcal/kg(0.75) of EBW for females) and sex did not affect k(m) (0.63). In contrast, sex no longer affected NEM when degree of maturity was considered on its estimation. The k(g) was different between sexes (0.31 for castrated males and females, and 0.26 for intact males), but k(p) (0.21) and k(f) (0.80) were similar between sexes. These results may be useful for improving robustness of the energy requirement recommendations for dairy goats. | - |
Descrição: dc.description | Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) | - |
Descrição: dc.description | Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) | - |
Descrição: dc.description | Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) | - |
Descrição: dc.description | Univ Estadual Paulista, Dept Anim Sci, BR-14884900 Jaboticabal, SP, Brazil | - |
Descrição: dc.description | Univ Fed Sul & Sudeste Para, Inst Estudos Trop Umido, BR-68557335 Xinguara, PA, Brazil | - |
Descrição: dc.description | Ohio State Univ, Dept Anim Sci, Columbus, OH 43201 USA | - |
Descrição: dc.description | Univ New England, Sch Environm & Rural Sci, Armidale, NSW 2351, Australia | - |
Descrição: dc.description | Univ Estadual Paulista, Dept Anim Sci, BR-14884900 Jaboticabal, SP, Brazil | - |
Descrição: dc.description | FAPESP: 2014/14734-9 | - |
Descrição: dc.description | CAPES: 001 | - |
Formato: dc.format | 272-281 | - |
Idioma: dc.language | en | - |
Publicador: dc.publisher | Elsevier B.V. | - |
Relação: dc.relation | Journal Of Dairy Science | - |
???dc.source???: dc.source | Web of Science | - |
Palavras-chave: dc.subject | comparative slaughter | - |
Palavras-chave: dc.subject | degree of maturity | - |
Palavras-chave: dc.subject | metabolizable energy | - |
Palavras-chave: dc.subject | partitioning of energy | - |
Título: dc.title | Energy requirements and efficiency of energy utilization in growing dairy goats of different sexes | - |
Tipo de arquivo: dc.type | livro digital | - |
Aparece nas coleções: | Repositório Institucional - Unesp |
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