Results 1 to 10 of about 4,556,667 (235)

On the exponent in the Von Bertalanffy growth model [PDF]

PeerJ, 2018
Von Bertalanffy proposed the differential equation m′(t) = p × m(t)a − q × m(t) for the description of the mass growth of animals as a function m(t) of time t.
Katharina Renner-Martin, Norbert Brunner, Manfred Kühleitner, Werner Georg Nowak, Klaus Scheicher   +4 more
doaj   +5 more sources

Best-Fitting Growth Curves of the Von Bertalanffy-Pütter Type [PDF]

Poultry Science, 2019
A large body of literature aims at identifying growth models that fit best to given mass-at-age data. The von Bertalanffy-Pütter differential equation is a unifying framework for the study of growth models.The most common growth models used in poultry science literature fit into this framework, as these models correspond to different exponent-pairs (e ...
Norbert Brunner, Klaus Scheicher, Manfred Kühleitner   +2 more
exaly   +4 more sources

Nonlinear mixed models for characterization of growth trajectory of New Zealand rabbits raised in tropical climate [PDF]

Animal Bioscience, 2022
Objective The identification of nonlinear mixed models that describe the growth trajectory of New Zealand rabbits was performed based on weight records and carcass measures obtained using ultrasonography.
Vanusa Castro de Sousa, Daniel Biagiotti, José Lindenberg Rocha Sarmento, Luciano Silva Sena, Priscila Alves Barroso, Sued Felipe Lacerda Barjud, Marisa Karen de Sousa Almeida, Natanael Pereira da Silva Santos   +7 more
doaj   +1 more source

SOME NEW RESULTS OF A FRACTIONAL VON BERTALANFFY MODEL

E-Jurnal Matematika, 2023
In this article, we review the deterministic and perturbed Von Bertalanffy model that has been developing to discuss the existence and uniqueness results of the model.
AVAN AL-SAFFAR
doaj   +1 more source

Comparación de ecuaciones para ajustar curvas de crecimiento de vacas Holstein, Jersey y Jersey x Holstein en pastoreo

Revista Mexicana de Ciencias Pecuarias, 2022
El objetivo del estudio fue comparar la bondad de ajuste de cuatro ecuaciones no lineales para describir las curvas de crecimiento de vacas Jersey, Holstein, y Jersey x Holstein en pastoreo.
Sonia Contreras Piña, José Guadalupe García Muñiz, Rodolfo Ramírez Valverde, Rafael Núñez Domínguez, Citlalli Celeste González Ariceaga   +4 more
doaj   +1 more source

Nonlinear equations to determine the growth curve of immunocastrated pigs [PDF]

Pesquisa Agropecuária Brasileira, 2020
: The objective of this work was to compare the performance of the nonlinear Gompertz, logistic, and von Bertalanffy equations, to describe the growth curve of immunocastrated male pigs from birth until reaching 140 kg body weight. Standard error, number
Marcos Speroni Ceron, Vladimir de Oliveira, Natielei Alexandre Nunes Novais Pieve, Nhayandra Christina Dias e Silva, Carlos Augusto Rigon Rossi, Bruno Neutzling Fraga, Henrique da Costa Mendes Muniz, Alexandre de Mello Kessler   +7 more
doaj   +2 more sources

Crecimiento del bagre dorado Brachyplatystoma rousseauxii en la región del Orinoco Medio en Venezuela, según la inferencia de modelos múltiples

Biotecnología en el Sector Agropecuario y Agroindustrial, 2022
Tradicionalmente se ha utilizado el modelo de von Bertalanffy como patrón único en el estudio del crecimiento de los peces, considerándolo a priori como el único modelo que se ajusta a los datos de longitu-edad de las especies; una consideración que ...
Angel Rafael González
doaj   +1 more source

Parâmetros genéticos da taxa de maturação e do peso assintótico de fêmeas da raça Nelore Genetic parameters of maturation rate and asymptotic weight of Nelore females

Arquivo Brasileiro de Medicina Veterinária e Zootecnia, 2005
Utilizaram-se 14.563 pesagens de 1158 fêmeas da raça Nelore, nascidas entre 1984 e 1995, pertencentes a 10 fazendas, distribuídas em sete estados do Brasil.
A. Del V. Garnero, C.R. Marcondes, L.A.F. Bezerra, H.N. Oliveira, R.B. Lôbo   +4 more
doaj   +1 more source

Nonlinear models for fitting growth curves of Nellore cows reared in the Amazon Biome

Revista Brasileira de Zootecnia, 2013
Growth curves of Nellore cows were estimated by comparing six nonlinear models: Brody, Logistic, two alternatives by Gompertz, Richards and Von Bertalanffy.
Kedma Nayra da Silva Marinho, Alfredo Ribeiro de Freitas, Alencariano José da Silva Falcão, Francisca Elda Ferreira Dias   +3 more
doaj   +1 more source

Comparison of some non-linear functions to describe the growth for Linda geese with CART and XGBoost algorithms

Czech Journal of Animal Science, 2022
The aim of this study was to determine the best non-linear function describing the growth of the Linda goose breed. To achieve this aim, five non-linear functions, such as exponential, logistic, von Bertalanffy, Brody and Gompertz, were employed to ...
Cem Tirink, Hasan Önder, Sabri Yurtseven, Zeliha Kaya Akil   +3 more
doaj   +1 more source