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| Henn,JD; Bockor,L; Ribeiro,AML; Coldebella,A; Kessler,A de M. |
| The objectives of the present study were to determine the parameters of Gompertz equations and to determine curves and growth rate, feed intake and body component deposition, as well as allometric coefficients of body water, protein, and fat relative to live weight of male and female broilers of intermediate performance (C44) and high performance (Cobb-500) genetic strains. In total, 384 one-d-old chicks were distributed into four treatments: male Cobb 500, male C44, female Cobb 500, and female C44, with six replicates of 16 birds, according to a completely randomized experimental design. Average body weight, weight gain, and feed intake were weekly determined, and six birds, representing the average weight of each treatment, were sacrificed to determine... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Body composition; Gompertz curve; Growth rate; Cobb 500; C44. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000300014 |
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| Grieser,Daiane de Oliveira; Marcato,Simara Márcia; Furlan,Antonio Claudio; Zancanela,Vittor; Gasparino,Eliane; Vesco,Ana Paula Del; Lima,Nayara Cristine Freitas; Pozza,Paulo Cesar. |
| ABSTRACT The objective of this study was to determine the adjustment quality of non-linear models and estimate the growth parameters and body chemical composition of a meat-type quail strain (Coturnix coturnix coturnix) and two laying quail strains (Coturnix coturnix japonica), designated yellow and red. The study used 1500 quail, not sexed, distributed in a completely randomized design with three treatments and five repetitions. The experimental period was from 1-42 days of age. The birds were raised in a conventional system and fed ad libitum with a diet formulated to meet their nutritional requirements. Quail were weighed weekly, and a representative sample was slaughtered to evaluate their body chemical composition. The adjustment quality of the models... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Body chemical deposition; Gompertz curve; Iterations; Residual mean square; Square sum of the regression residual. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100543 |
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| MELLO,FERNANDA DE; OLIVEIRA,CARLOS A.L.; RIBEIRO,RICARDO P.; RESENDE,EMIKO K.; POVH,JAYME A.; FORNARI,DARCI C.; BARRETO,ROGÉRIO V.; MCMANUS,CONCEPTA; STREIT JR,DANILO. |
| ABSTRACT Was evaluated the pattern of growth among females and males of tambaqui by Gompertz nonlinear regression model. Five traits of economic importance were measured on 145 animals during the three years, totaling 981 morphometric data analyzed. Different curves were adjusted between males and females for body weight, height and head length and only one curve was adjusted to the width and body length. The asymptotic weight (a) and relative growth rate to maturity (k) were different between sexes in animals with ± 5 kg; slaughter weight practiced by a specific niche market, very profitable. However, there was no difference between males and females up to ± 2 kg; slaughter weight established to supply the bigger consumer market. Females showed weight... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gompertz curve; Body growth; Maximum growth rate; Slaughtered point. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000502309 |
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