Analysis of growth curves of Guinea fowl (Numida meleagris) fed diets containing dry oregano (Origanum vulgare L.) in an organic system

Abstract

H. Eleroğlu, A. Yıldırım, A. Canikli, M. Duman, and H. Bircan. 2018. Analysis of growth curves of Guinea fowl (Numidea meleagris) fed diets containing dry oregano (Origanum vulgare L.) in an organic system. Cien. Inv. Agr. 45(2): 99-108. In this study, 240 day-old guinea fowl (Numida meleagris) keets were utilized. They were divided into four treatment groups each containing 20 chicks and were randomly distributed into 12 mobile coops placed in a 100-m 2 grazing area. Guinea fowl chicks were randomly allocated to 4 treatment diets containing 0%, 5%, 10%, and 15% dry oregano leaf (DOL) supplements. Nonlinear Gompertz and logistic growth models were used to estimate the mean age-body weight. The growth curve parameters for these models and the following characteristics for fowl were estimated: β 0 , the asymptotic weight parameter; β 1 , the scaling parameter; β 2 , the instantaneous per week growth rate; weight at age of inflection point (WIP); maximum weight gain at inflection point (MWG); and age at the inflection point (AIP). The goodness of fit (GF) for the models was assessed using the following variables: coefficients of determination (r 2), mean square error (MSE), adjusted determination coefficient (ADR 2), Akaike's information criteria (AIC), chi-square test (Chi.Sq 2) and residual standard deviation (RSD). The different nonlinear function results of the individual data indicated that supplementation of diets with DOL had no significant effects on growth curve parameters when compared with the control diet. Greater correlation values were estimated among β 0 , β 1 , β 2 , WIP, MWG and AIP in the Gompertz equation, and similar results were estimated in the logistic equation, but there was no significant correlation between β 2-β 1 and β 2-MWG. According to the results obtained from the GF, high r 2 and ADR 2 were estimated in Gompertz and logistic equations (above 0.96).

Growth curves of broilers fed different nutritional relationships using the Gompertz model

“…As can be seen, weight at maturity (A) was very similar between treatments, ranging from 5.6 kg to 6.0 kg. This is probably because different diets could only influence the growth rate of animals (K) but not the weight at maturity (Eleroğlu et al, 2018). The parameter A (5.825 kg) determined in the present study differed from obtained by Vargas et al (2020), who evaluated the growth of Cobb 500 male broilers using the Gompertz model and obtained a maximum weight of 8.416 kg.…”

“…In agreement with Aggrey (2002), genetics, sex, and nutrition are the main factors acting in animal growth. Over the years, the improvement in nutrition was able to produce different responses on the feed efficiency of birds and shorten the period to achieve the maximum weight, changing the rate to reach maturity (K) (Eleroğlu, Yildirim, Canikli, Duman, & Bircan, 2018). In this way, evaluating the impact of different nutritional management on broiler growth allows to define the best nutritional plan for maximum performance, and it is possible to verify the impact of different ingredients and additives on bird growth.…”

Kazlarda Çevresel Zenginleştirmenin Büyüme Üzerine Etkilerinin Bazı Modellerle Karşılaştırılması

“…Also,these models are used in breeding to have information about the situations such as performing predictions about future, selecting broods and evaluating health (Colak et al, 2006). To model the growth in poultry, the growth curve models such as Brody, Gompertz, Logistic, vonBertalanffy and Richards are used commonly (Zhao et al, 2015;Alkan and Birgul, 2017;Michalczuk et al, 2016;Demuner et al, 2017;Eleroglu et al, 2018).…”

Comportamiento productivo y composición de la canal de la gallina de Guinea (Numida meleagris)

“…La crianza de N. meleagris tiene ventajas considerables; por ejemplo, las aves se adaptan a diversas condiciones agroclimáticas, consumen una gran variedad de alimentos no convencionales, tienen la capacidad de protegerse ante depredadores, controlan las garrapatas y otras plagas, son tolerantes a la mayoría de las enfermedades comunes de las aves de corral y no se requiere demasiada mano de obra e infraestructura costosa para su manejo (Ebegbulem, 2018;Koné et al, 2018;Musundire et al, 2018). Productivamente, la gallina de Guinea también presenta buena ganancia de peso, conversión alimenticia (Houndonougbo et al, 2017;Eleroğlu et al, 2018) y rendimiento de la canal (Mareko et al, 2006;Chiroque et al, 2018), aun cuando es comparado con el rendimiento de la canal del pollo (Musundire et al, 2018). Otra cualidad relevante de esta ave es la calidad nutricional de su carne, ya que se ha determinado el alto contenido de minerales y ácidos grasos esenciales (Bernacki et al, 2012), además de su alto contenido proteico y bajo contenido de grasa (Hoffman y Tihong, 2012), características que mejoran cuando las aves son criadas de manera semi-intensiva o "al aire libre" (Sarica et al, 2019).…”