Estimation of parameters of linear and nonlinear growth curve models at early growth stage in California Turkeys

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dc.contributor.authorErsoy, I. E.
dc.contributor.authorMendes, M.
dc.contributor.authorKeskin, S.
dc.date.accessioned2025-01-27T20:20:14Z
dc.date.available2025-01-27T20:20:14Z
dc.date.issued2007
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractThis study was designed to investigate growth characteristics of totally 194 California turkeys (98 male, 96 female) using their weight-age data at early growth stage (during first 10 weeks). Linear, Logistic with three parameters and Richards' growth models were applied to estimate growth parameters. Results of analyses showed that both Logistic and Richard's growth models fitted weight and age data very well with R-2 = 99.3% and 99.4% for males and R-2 = 99.2% and 99.3% for females. Mature weights of males and females estimated using Logistic growth (2,228 +/- 55.3 g and 2,011 +/- 54.4 g) model and Richard's growth model (2,195 +/- 62.5 g and 1,973 +/- 59.9 g) was similar. In the case of the estimate on the change of body weights of male and female turkeys by equations W-t = -196.22 + 275.98t and W-t = -169.50 + 246.28t using the linear model, the k2 values of the estimates were 93.8% and 94.0%. R2 values in the linear model were smaller than those in the Logistic and Richards's models. When comparison is done based on the other criteria (Jp, AIC, BIC, DW, and asymptotic correlation), Logistic and Richard's growth models can be assumed to be more appropriate to estimate growth characteristics of young turkeys. On the other hand, among these growth curve models the logistic model can give the most reliable estimates of growth parameters of turkeys at early stage of life.
dc.identifier.endpage180
dc.identifier.issn0003-9098
dc.identifier.issue4
dc.identifier.scopus2-s2.0-34548564202
dc.identifier.scopusqualityN/A
dc.identifier.startpage175
dc.identifier.urihttps://hdl.handle.net/20.500.12428/21628
dc.identifier.volume71
dc.identifier.wosWOS:000249218800005
dc.identifier.wosqualityQ4
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherEugen Ulmer Gmbh Co
dc.relation.ispartofArchiv Fur Geflugelkunde
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WoS_20250125
dc.subjectCalifornia Turkey
dc.subjectgrowth curve
dc.subjectbody weight
dc.subjectRichard's model
dc.subjectlogistic model
dc.titleEstimation of parameters of linear and nonlinear growth curve models at early growth stage in California Turkeys
dc.typeArticle

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