Use of mathematical models in the study of bodily growth in GIFT strain Nile tilapia
The objective of this study was to evaluate the accuracy of five mathematical models (Gompertz, Logistic, Linear Hyperbolic, Quadratic and Quadratic Logarithmic) to describe the growth curve of GIFT strain Nile tilapia, Oreochromis niloticus, and to characterize the growth trajectory of body parts....
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| Format: | Article |
| Language: | English |
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Universidade Federal do Ceará
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| Series: | Revista Ciência Agronômica |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000200005&lng=en&tlng=en |
| _version_ | 1818551320691343360 |
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| author | Alda Lúcia de Lima Amancio José Humberto Vilar da Silva João Batista Kochenborger Fernandes Nilva Kazue Sakomura George Rodrigo Beltrão da Cruz |
| author_facet | Alda Lúcia de Lima Amancio José Humberto Vilar da Silva João Batista Kochenborger Fernandes Nilva Kazue Sakomura George Rodrigo Beltrão da Cruz |
| author_sort | Alda Lúcia de Lima Amancio |
| collection | DOAJ |
| description | The objective of this study was to evaluate the accuracy of five mathematical models (Gompertz, Logistic, Linear Hyperbolic, Quadratic and Quadratic Logarithmic) to describe the growth curve of GIFT strain Nile tilapia, Oreochromis niloticus, and to characterize the growth trajectory of body parts. To do this, 1,000 fingerlings, with an initial weight of 2.4 g were placed into 20 brick tanks of 2 m³ each, at a density of 25 fish m-3, for 180 days. The animals were fed daily, using the protein levels and number of meals appropriate to each stage. Every two weeks 20 fish were randomly sampled, submitted to a fasting period of 48 h and then slaughtered by thermal shock, in order to determine the weight of the whole fish, the skin without scales, skinless fillets, heart, liver, gills and gastrointestinal tract. The Gompertz and Logistic models presented the best fit to the growth curve for live weight, fillet and skin, however the Logistic model underestimated the asymptotic weights. Therefore, to describe the growth curve in GIFT strain Nile tilapia, the Gompertz model is suggested. According to the parameters estimated by the Gompertz model, Nile tilapia reach the age for maximum growth of the fillet and skin before that of body weight. Among the organs studied, growth of the gastrointestinal tract and gills takes place earlier than that of the heart and liver. |
| first_indexed | 2024-12-12T08:58:20Z |
| format | Article |
| id | doaj.art-68bb3bed7c4743e9bef69dbc92eae35c |
| institution | Directory Open Access Journal |
| issn | 1806-6690 |
| language | English |
| last_indexed | 2024-12-12T08:58:20Z |
| publisher | Universidade Federal do Ceará |
| record_format | Article |
| series | Revista Ciência Agronômica |
| spelling | doaj.art-68bb3bed7c4743e9bef69dbc92eae35c2022-12-22T00:29:55ZengUniversidade Federal do CearáRevista Ciência Agronômica1806-669045225726610.1590/S1806-66902014000200005S1806-66902014000200005Use of mathematical models in the study of bodily growth in GIFT strain Nile tilapiaAlda Lúcia de Lima Amancio0José Humberto Vilar da Silva1João Batista Kochenborger Fernandes2Nilva Kazue Sakomura3George Rodrigo Beltrão da Cruz4Universidade Federal da ParaíbaUniversidade Federal da ParaíbaUniversidade Estadual PaulistaUniversidade Estadual PaulistaUniversidade Federal da ParaíbaThe objective of this study was to evaluate the accuracy of five mathematical models (Gompertz, Logistic, Linear Hyperbolic, Quadratic and Quadratic Logarithmic) to describe the growth curve of GIFT strain Nile tilapia, Oreochromis niloticus, and to characterize the growth trajectory of body parts. To do this, 1,000 fingerlings, with an initial weight of 2.4 g were placed into 20 brick tanks of 2 m³ each, at a density of 25 fish m-3, for 180 days. The animals were fed daily, using the protein levels and number of meals appropriate to each stage. Every two weeks 20 fish were randomly sampled, submitted to a fasting period of 48 h and then slaughtered by thermal shock, in order to determine the weight of the whole fish, the skin without scales, skinless fillets, heart, liver, gills and gastrointestinal tract. The Gompertz and Logistic models presented the best fit to the growth curve for live weight, fillet and skin, however the Logistic model underestimated the asymptotic weights. Therefore, to describe the growth curve in GIFT strain Nile tilapia, the Gompertz model is suggested. According to the parameters estimated by the Gompertz model, Nile tilapia reach the age for maximum growth of the fillet and skin before that of body weight. Among the organs studied, growth of the gastrointestinal tract and gills takes place earlier than that of the heart and liver.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000200005&lng=en&tlng=enOreochromis niloticusGrowth curveGompertzGrowth rate |
| spellingShingle | Alda Lúcia de Lima Amancio José Humberto Vilar da Silva João Batista Kochenborger Fernandes Nilva Kazue Sakomura George Rodrigo Beltrão da Cruz Use of mathematical models in the study of bodily growth in GIFT strain Nile tilapia Revista Ciência Agronômica Oreochromis niloticus Growth curve Gompertz Growth rate |
| title | Use of mathematical models in the study of bodily growth in GIFT strain Nile tilapia |
| title_full | Use of mathematical models in the study of bodily growth in GIFT strain Nile tilapia |
| title_fullStr | Use of mathematical models in the study of bodily growth in GIFT strain Nile tilapia |
| title_full_unstemmed | Use of mathematical models in the study of bodily growth in GIFT strain Nile tilapia |
| title_short | Use of mathematical models in the study of bodily growth in GIFT strain Nile tilapia |
| title_sort | use of mathematical models in the study of bodily growth in gift strain nile tilapia |
| topic | Oreochromis niloticus Growth curve Gompertz Growth rate |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000200005&lng=en&tlng=en |
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