125760 20241125101133.0 doi 10.5424/sjar/2023211-19218 sideral 133331 ART-2023-133331 eng Sánchez-Esquiliche, Fernando Prediction of growth performance parameters in the growing and free-range finishing phases of the Iberian pig via meta-analysis 2023 Access copy available to the general public Unrestricted Aim of study: To describe and predict mathematically the growth parameters of Iberian pigs. Area of study: Iberian dehesa agroforestry system. Southwest of Iberian Peninsula. Material and methods: A quantitative and systematic review was carried out to find all studies with valid data of growth and finishing in the Iberian swine breed published up to May 2020. For the analysis of the data, a mathematical fitting model was obtained and a function was postulated to describe the relation between the variables age and body weight. Main results: 112 publications were found, and after applying several quality filters, 18 with age and weight matched data were used. The database was composed of 76 different tests and 22,558 animals. The clasical growth phases were independently evaluated for data analysis.It was necessary to separate the finishing trials into three groups according to the starting age. Seven mathematical models were obtained for lactation,post-weaning, and montanera finishing. However, no valid test data were found during the growth and prefinishing phases. Besides that, a single model was obtained combining lactation and post-weaning, and another surface model including the variables age and weight to compare average daily weight gain in montanera finishing phase. Research highlights: After systematic review of the studies that provide information on the growth of Iberian pigs, and a quantitative analysis, some mathematical linear and nonlinear models have been developed for the prediction of the production ratios at different phases. info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 0.8 2023 AGRICULTURE, MULTIDISCIPLINARY 55 / 89 = 0.618 2023 Q3 T2 0.243 2023 Agronomy and Crop Science 2023 Q3 2.0 2023 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Ferreira, Chelo Rodríguez-Estévez, Vicente Muniesa, Ana Universidad de Zaragoza (orcid)0000-0003-3074-5778 1009 773 Universidad de Zaragoza Dpto. Patología Animal Área Sanidad Animal 21, 1 (2023), e0603 [8 pp.] Span. j. agric. res. Spanish Journal of Agricultural Research 1695-971X 636015 http://zaguan.unizar.es/record/125760/files/texto_completo.pdf Versión publicada 2453857 http://zaguan.unizar.es/record/125760/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:125760 articulos driver 2024-11-22-11:59:38 ARTICLE