Resumo

GOMEZ CUELLO, Jorge E et al. Laying Curve Model of White Leghorn Hens in the Last Three Years in the Province of Ciego de Avila, Cuba. Rev. prod. anim. [online]. 2017, vol.29, n.2, pp. 42-49. ISSN 2224-7920.

A number of 15 976 egg production records from three hen batches in Ciego de Avila (2016) were used. The laying curve was characterized in similar conditions to IIA (2013), Republic of Cuba. Estimation of the laying curves made to mean productions from three stages in a year, was presented. Four mathematical models were applied for curve adjustment: McNally, Wood, quadratic logarithmic, and linear hyperbolic. Different statistical criteria were used for validation: determination coefficient , , as well as residue analysis and others. Mean, standard deviation (SD), standard error (SE), and variation coefficient (VC) were achieved for each period. Egg production accounted for 84.35 and 60.61% of total laying, 2016 was the best year. The highest values of SE and VC were observed at the end of production, as expected. Adjustment and discrimination showed a high adjustment criterion in the four models, but the best values were observed with McNally (1971), in (99.60%), and adjusted (99.42%). McNally reached the highest adjustment values: YM=-2233.62-18583.8*(MONTH/426)-029.0*(MONTH/426**2+780.241*log (426/MONTH)-68.1269*(log (426/MONTH))*2, and it described the best production of White Leghorn hens in Ciego de Avila.

Palavras-chave : aviculture; laying curves; models; prediction.

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