&lt;b&gt;Analysis of growth curves in different lineages of &lt;i&gt;Caipira&lt;/i&gt; broiler type

Araújo, Caroliny Costa; Rodrigues, Kênia Ferreira; Vaz, Roberta Gomes Marçal Vieira; Conti, Ana Carolina Müller; Amorim, Aline Ferreira; Campos, Carla Fonseca Alves

doi:10.4025/actascianimsci.v40i1.38806

Cited by 3 publications

(2 citation statements)

References 12 publications

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“…This lower growth rate is possibly related to the fact that this is a dual-purpose lineage (meat and eggs) (Albino and Moreira, 2006). Araújo et al (2018) obtained similar results, where Carijó birds showed a lower growth rate than CPK chickens, based on derivations of Logistic model parameters. In a study led by Santos et al (2005), with the free-range lineages CJD and PSC, the former displayed greater growth potential, according to the Gompertz model.…”

Section: Resultsmentioning

confidence: 53%

“…Although the PSC and CJD strains belong to the category called 'heavy', slower growth is a characteristic of this group. These lineages have the dual ability, being widely used by small rural producers in the production of eggs and meat (Araújo et al, 2018;Albuquerque et al, 2020). The CPK lineage belongs to the 'super heavy' category, whose characteristics include higher body weight and an earlier development compared to the 'heavy' category (Lemos et al, 2018).…”

Section: Resultsmentioning

confidence: 99%

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Growth curves of different free-range chicken lineages by the Gompertz model

Brito

Maciel

Corassa

et al. 2021

RSD

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The knowledge of the dynamics of animal growth over time can be done through non-linear equations. Thus, the objective was to describe and compare the growth of three free-range chicken lineages based on the Gompertz equation. 180 unsexed chickens assigned to three treatments (Pesadão Vermelho, Pescoço Pelado and Carijó Pesado lineages) in a randomized design with six replicates, with 10 birds per experimental unit. Broilers were weighed weekly (until 77 days of age), these data were used to estimate the growth curve and determine the equation parameters (A, B and C) of model used. The comparison tests between the model parameters for each lineage, demonstrated that it is necessary an equation with different A, B and C parameters for each lineages, the lack-of-fit test was not significant (p>0.05), therefore, the equations of the model are suitable to describe the growth of the lineages. The Pesadão Vermelho lineages is heaviest at inflection point and earlier (BWe =1,528 g at 39 days of age), compared to the Pescoço Pelado (BWe=1,185 g at 38 days of age) and the Carijó Pesado (BWe=1,183 g at 51 days of age) lineage. The adjusted Gompertz curves accurately estimated growth curves of the evaluated line-ages. An equation with different A, B and C parameters is required for each lineage. The Pesadão Vermelho lineage is heaviest at maturity. The Carijó Pesado lineage has a slow growth, with low weight at maturity and the oldest age at maturity.

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Section: Resultsmentioning

confidence: 53%

Section: Resultsmentioning

confidence: 99%

Growth curves of different free-range chicken lineages by the Gompertz model

Brito

Maciel

Corassa

et al. 2021

RSD

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The potential post-hatching growth of domestic birds is sufficiently described by the Gompertz function

Emmans

2022

British Poultry Science

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Evaluation of Growth in Broiler Chicken Using General Linear and Multi-Level Linear Growth Models

Izgi¹,

Akkol

Tekeli

2020

Türkiye Tarımsal Araştırmalar Dergisi

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Bu çalışma, genel doğrusal ve çok seviyeli doğrusal büyüme modellerini kullanarak büyüme eğrisi modellerini karşılaştırmak ve etlik piliçlerde büyümedeki farklılıkların tespit edilmesi amacıyla yapılmıştır. Bu amaçla 74 erkek etlik pilicin canlı ağırlık kayıtlarını içeren veri seti kullanılmıştır. Ölçümler yumurtadan çıkıştan altıncı haftaya kadar haftada bir olmak üzere bireysel olarak kaydedilmiştir. Verilerin analizi için, genel doğrusal modellerden iki ve çok seviyeli doğrusal modellerden üç olmak üzere beş farklı büyüme modeli kullanılmıştır. Değişimi en iyi açıklayan modeli bulmak için; log olabilirlik (log-likelihood, ll), Akaiki bilgi ölçütü (Akaike Information Criteria, AIC), Bayes bilgi ölçütü (Bayesian Information Criteria, BIC), düzeltilmiş Akaiki bilgi ölçütü (AIC Corrected, AICC) ve olabilirlik oran testi (Likelihood Ratio Test, LRT)'nden faydalanılmıştır. Çalışmanın sonuçları, çok seviyeli büyüme modellerinin genel doğrusal modellerden daha hassas tahminler yaptığını ve büyümeyi en iyi açıklayan modelin en küçük uyum ölçütlerine sahip "kesim noktası ve eğimin şansa bağlı olduğu kuadratik büyüme modeli" olduğunu ortaya koymuştur. Bu modele göre, erkek etlik piliçlerde büyüme üzerine zamanın lineer ve kuadratik etkisiyle birlikte yumurtadan çıkıştan itibaren büyümenin takip edildiği süre boyunca bireysel farklılıkların anlamlı olduğu sonucuna varılmıştır.

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<b>Analysis of growth curves in different lineages of <i>Caipira</i> broiler type

Cited by 3 publications

References 12 publications

Growth curves of different free-range chicken lineages by the Gompertz model

Growth curves of different free-range chicken lineages by the Gompertz model

The potential post-hatching growth of domestic birds is sufficiently described by the Gompertz function

Evaluation of Growth in Broiler Chicken Using General Linear and Multi-Level Linear Growth Models

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