A description of the growth and moulting of feathers in commercial broilers

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorUniversity of KwaZulu-Natal-
Autor(es): dc.creatorVargas, L. [UNESP]-
Autor(es): dc.creatorSakomura, N. K. [UNESP]-
Autor(es): dc.creatorLeme, B. B. [UNESP]-
Autor(es): dc.creatorAntayhua, F. A.P. [UNESP]-
Autor(es): dc.creatorCampos, D. [UNESP]-
Autor(es): dc.creatorGous, R. M.-
Autor(es): dc.creatorFisher, C.-
Data de aceite: dc.date.accessioned2022-02-22T00:31:22Z-
Data de disponibilização: dc.date.available2022-02-22T00:31:22Z-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-07-03-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1080/00071668.2020.1747597-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/200669-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/200669-
Descrição: dc.description1. Changes in feather length and weight and daily losses of down, contour feathers, remiges and retrices were studied in two commercial broiler strains to determine feather growth and moult in broilers up to 112 d of age. 2. Ten pens of 20 chicks for each sex x strain were fed adequate amounts of dietary protein in a four-phase feeding programme. Ten birds were sampled per genotype at 14, 28, 42, 56, 70, 84, 98 and 112 d. Feather loss was determined for individual birds caged within a nylon net. 3. All feathers were dry-plucked from each of seven tracts, with representative feathers from the capital-cervical, dorsopelvic and interscapular, pectoral and femoral tracts being randomly selected. Three rectrices of the dorsocaudal tract and three primaries and secondaries of the humeral-alar tract of the right wing were evaluated. 4. The length of the selected feathers was measured, and the feathers from each tract and from the whole bird were weighed. 5. A wide range of rates of maturing (0.0250–0.0907/d) and mature weights (9.62–52.9 g) were evident between sampled tracts. 6. Feather weight failed to predict some moults which were detected by the measurement of feather losses. From the weight data, moulting was evident only in the humeral-alar and dorsocaudal tracts, whereas, when daily losses were measured, contour feathers accounted for over 0.7 proportion of feather losses. Logistic equations adequately described the cumulative losses of down, contour feathers and remiges. 7. Feather loss needs to be considered when feather growth is determined from feather weight at different ages. 8. The rate of maturing (B) of feathers was numerically higher in Ross males and females than in the Cobb strain. In females, B was higher than in males (0.0483 vs. 0335/d) but the mature weight was lower (162 vs. 230 g).-
Descrição: dc.descriptionFaculdade de Ciências Agrárias e Veterinárias Departamento de Zootecnia da FCAV-UNESP Universidade Estadual Paulista Júlio De Mesquita Filho-
Descrição: dc.descriptionSchool of Agricultural Environmental and Earth Sciences University of KwaZulu-Natal-
Descrição: dc.descriptionFaculdade de Ciências Agrárias e Veterinárias Departamento de Zootecnia da FCAV-UNESP Universidade Estadual Paulista Júlio De Mesquita Filho-
Formato: dc.format454-464-
Idioma: dc.languageen-
Relação: dc.relationBritish Poultry Science-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectcontour feathers-
Palavras-chave: dc.subjectFeather tracts-
Palavras-chave: dc.subjectrectrices-
Palavras-chave: dc.subjectremiges-
Título: dc.titleA description of the growth and moulting of feathers in commercial broilers-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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