Banca de DEFESA: JEAN GOMES PEREIRA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : JEAN GOMES PEREIRA
DATE: 10/06/2022
TIME: 08:00
LOCAL: INSTITUTO DE ZOOTECNIA
TITLE:

Adjustments to nonlinear equations to estimate growth and food consumption for Nile tilápia (Oreochromis niloticus) in net cage

KEY WORDS:

Mathematics, Models, Precision, System intensive.

PAGES: 38
BIG AREA: Ciências Agrárias
AREA: Zootecnia
SUMMARY:

GOMES PEREIRA, Jean. Adjustments to nonlinear equations to estimate growth and food consumption for Nile tilápia (Oreochromis niloticus) in net cage. 2022. 38p. Dissertation (Masters in Animal Science). Zootechny Institute, Federal Rural University from Rio de Janeiro, Seropédica, RJ, 2022. Mathematical models are the referential bases for automatic production systems to be performed and effective. The objective of this research was to adjust equations of non-linear models (Gompertz and Logistic) to estimate the growth and feed consumption of Nile tilapia from data from real production in cages. To model the growth in body weight (g) and feed intake (g) during 120 days of rearing Nile tilapia (Oreochromis niloticus) in the fattening stage under commercial cultivation conditions, data were obtained from nine cages of a fish farm. located in the South of the State of Rio de Janeiro. These data come from the creation of tilapia in the intensive system in net tanks and obtained through biweekly biometrics (nine biometrics) and the daily amount of feed offered to the animals. These data were used to adjust two traditional non-linear mathematical models (Gompertz and Logistic) through the Least Squares theory, using the iterative Marquardt method. The computational procedures were performed by PROC NLIN of SAS. Fit evaluators (AIC, DMA, biological interpretation and analysis of residues) were adopted, selecting the best model. The growth curves for Nile tilapia (Oreochromis niloticus) for the nine net tanks through the Gompertz equation in the same plane with the observed points reveal the differentiated curve behavior for each sampling unit, it was observed the heterogeneity of the curves and values in weight for this fish population at the end of 360 days of rearing.

BANKING MEMBERS:
Externa à Instituição - GISELLE ELER AMORIM DIAS - FIPERJ
Presidente - 066.467.316-32 - MARCELO MAIA PEREIRA - OUTRO
Externo à Instituição - RODRIGO TAKATA - FIPERJ