Improving growth performance and caudal fin stripe pattern in selected F6–F8 generations of GIFT Nile tilapia (Oreochromis niloticus L.) using mass selection

Li, Sifa; He, Xuejun; Hu, Guocheng; Cai, Wei; Deng, Xiaowei; Zhou, P. K.

doi:10.1111/j.1365-2109.2006.01543.x

Cited by 28 publications

(23 citation statements)

References 16 publications

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“…Genetic gain ranged between 12.0 and 17.0% for the generation growth rate in a GIFT strain Nile tilapia (Oreochromis niloticus) breeding program in the Philippines during five generations of genetic selection for weight gain (EKNATH; ACOSTA, 1998;GUPTA;ACOSTA, 2004;LI et al, 2006). Gjedrem (2000) reported estimates of genetic selection responses to weight gain for the rainbow trout (Oncorhynchus mykiss) and the channel catfish (Ictalurus punctatus) with rates 13.0 and 20.0%, respectively.…”

Section: Resultsmentioning

confidence: 99%

Weight gain and morphometric growth of genetically improved tambaqui (Colossoma macropomum)

Marcos

Povh

Fornari³

et al. 2016

SCA

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Weight gain and morphometric growth of the genetically improved tambaqui (Colossoma macropomum) are evaluated. Current assay was carried out on the Fish Farm Experimental Station of the Federal University of Mato Grosso, in the municipality of Santo Antonio de Leverger -MT Brazil. Seven fish families from the breeding program and a control group (not genetically improved) were evaluated. All animals were individually identified with a transmitter-responder label (transponder). Weight gain, overall and standard length, head size, height, width and body perimeter were measured. A completely randomized design was used and comparisons among families and the control group were carried out by Dunnett test at 5% significance level. The genetically improved fish families showed a 14.8% higher weight gain when compared to that of control group. Five out of seven families showed greater weight gain when compared to control group, with the best family exhibiting a 24.8% higher rate. Four families had higher growth in all evaluated morphometric characteristics when compared to control group. Only one family did not differ in any of the evaluated characteristics with regard to the control group. Key words: Genetic improvement of fish. Fish of the Amazon basin. Genetic selection. e um grupo controle (não melhorado geneticamente). Todos os animais foram individualizados com transponder. Foram mensurados o ganho de peso, comprimento total e padrão, tamanho de cabeça, altura, largura e perímetro do corpo. Utilizou-se delineamento inteiramente casualizado e as comparações entre as famílias e o grupo controle foram realizadas pelo teste de Dunnett com 5% de significância. As famílias melhoradas geneticamente apresentaram ganho de peso 14,8% superior ao grupo controle. Cinco das sete famílias avaliadas apresentaram maior ganho de peso em relação ao grupo controle, sendo que a melhor família foi superior em 24,8%. Quatro famílias apresentaram maior crescimento em todas as características morfométricas avaliadas em relação ao controle. Apenas uma família não diferiu em nenhuma das características avaliadas em relação ao grupo controle. Palavras-chave: Melhoramento genético de peixes. Peixe da bacia amazônica. Seleção genética. Resumo

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Section: Resultsmentioning

confidence: 99%

Weight gain and morphometric growth of genetically improved tambaqui (Colossoma macropomum)

Marcos

Povh

Fornari³

et al. 2016

SCA

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“…La caracterización genética de líneas de peces puede servir como herramienta para el establecimiento de bases de selección. Como afirmaron Li et al (2006), la mejora de la calidad genética de O. niloticus es fundamental para asegurar el futuro de la tilapicultura en varios países del mundo. Este aspecto puede ser utilizado para aumentar la variabilidad genética y explorar positivamente el efecto de la heterosis (Mather, 2001).…”

Section: Resultados Y Discusiónunclassified

“…Por otro lado, la línea Chitralada, originaria de Egipto, comenzó a ser importada en 1996, cuando fueron introducidos 20 800 ejemplares en el Estado del Paraná (Zimmermann, 1999). El proyecto denominado GIFT (The Genetic Improvement of Farmed Tilapia -GIFT) tuvo inicio en 1988, liderado por el órgano no gubernamental WorldFish Center (Gupta y Acosta, 2004;Li et al, 2006). La Estación Experimental de la Universidade Estadual de Maringá (UEM-CODAPAR) recibió los primeros ejemplares oriundos de 30 familias en marzo de 2005, a partir de un proyecto elaborado en conjunto con el WorldFish Center, y con el apoyo de la Secretaria Especial de Acuicultura y Pesca -SEAP Brasil (Lupchinski Jr., 2007).…”

Section: Introductionunclassified

Caracterización genética de tres líneas de tilapia del Nilo (Oreochromis niloticus)

et al. 2011

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RESUMENEl objetivo de este estudio fue analizar la diversidad genética de tres líneas de tilapia del Nilo (Oreochromis niloticus), mediante marcadores RAPDs. Se analizaron 90 individuos adultos (30 de cada línea) de dos piscifactorías ubicadas en las ciudades de Maringá (líneas Bouaké -B y GIFT -G) y Guaíra (línea Chitralada -C), en el Estado del Paraná (Brasil). Los 13 oligonucleótidos seleccionados produjeron 72 fragmentos de los cuales 60 (83,3%) fueron polimórficos. Fueron observadas diferencias (p<0,05) en la frecuencia de 33 fragmentos, con 14 excluidos. Los resultados de variabilidad genética estimados por el porcentaje de fragmentos polimórficos y por el índice de diversidad genética de Shannon indicaron una alta variabilidad genética intra-poblacional. De acuerdo con el AMOVA, la mayor parte de la variación está dentro de cada línea. Este resultado se corroboró con los valores de FST, que mostraron una moderada diferenciación genética. También se constató que C y G fueron las líneas más semejantes genéticamente y que B y G presentaron menos genes en común. Los resultados de este estudio posibilitaran el correcto manejo reproductivo y genético de estas líneas de peces. SUMMARYThe aim of this study was to analyze the genetic diversity of three Nile tilapia (Oreochromis niloticus) strains, through the RAPD markers. Ninety adult individuals (30 of each strain) of two fish farms stations located in the Maringá (Bouaké -B and GIFT -G strains) and Guaíra (Chitralada -C strain) cities, in the Paraná State (Brazil) were analyzed. The 13 selected primers yielded 72 fragments of which 60 (83.3%) were polymorphic. Differences (p<0.05) in the frequency of 33 fragments were observed, with 14 eliminated. The genetic variability results estimated by the percentage of polymorphic fragments and for the genetic diversity of Shannon index indicated a high intra-populational genetic variability. According with the AMOVA, most of the variation is within each strain. This result was corroborated with the FST values that showed a moderate genetic differentiation. It was also verified that C and G were the strains but similar genetically and that B and G presented less genes in common. The results of this study facilitated the correct reproductive and genetic management of these fish strains. INTRODUCCIÓNEn Brasil la producción total acuícola pasó de aproximadamente 30 000 toneladas en el inicio de los años noventa, hasta un

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“…Thus, to describe the average growth curve of fillet and skin, only the Hyperbolic Linear model should not be used. Use of mathematical models in the study of bodily growth in GIFT strain Nile tilapia It can be seen from the data that the maximum growth rates were achieved in the period near the age of sexual maturity, which, according to Li et al (2006), occurs between 150 and 200 days of age and at a body weight exceeding 250 g. Liu and Chang (1992) observed that the growth of Nile tilapia was affected by sexual maturity and that growth rates decreased after the start of reproduction.…”

Section: Growth Curve For Fillet and Skin Weightmentioning

confidence: 99%

Use of mathematical models in the study of bodily growth in GIFT strain Nile tilapia

Amâncio¹,

Silva²,

Fernandes³

et al. 2014

Rev. Ciênc. Agron.

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-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 m 3 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.Key words: Oreochromis niloticus. Growth curve. Gompertz. Growth rate.RESUMO -Objetivou-se com o presente estudo avaliar a acurácia de cinco modelos matemáticos (Gompertz, Logístico, Linear Hiperbólico, Quadrático e Quadrático Logarítmico) para descrever a curva de crescimento de tilápia nilótica Oreochromis niloticus da linhagem GIFT e, realizar a caracterização da trajetória do crescimento das partes corporais. Para tal, 1.000 alevinos com peso inicial de 2,4 g foram estocados em 20 tanques de alvenaria de 2 m 3 numa densidade de 25 peixes m -3 , por um período de 180 dias. Os animais foram alimentados diariamente, utilizando níveis de proteína e número de refeições diárias de acordo com cada fase. Quinzenalmente, foram amostrados aleatoriamente 20 peixes, submetidos a um jejum de 48 h e abatidos por choque térmico, para determinação dos pesos do peixe inteiro, peles sem escamas, filés sem pele, coração, fígado, brânquias e trato gastrointestinal. Os modelos Gompertz e Logístico foram os que mais se adequaram ao ajuste da curva de crescimento do peso vivo, do filé e da pele, todavia, o Logístico subestimou os pesos assintóticos. Desta forma, sugere-se o Gompertz para descrever a curva de crescimento de tilápia nilótica da linhagem GIFT. De acordo com os parâmetros estimados pelo modelo Gompertz, a tilápia nilótica atinge a idade de máximo crescimento do filé e pele antes da idade do peso vivo. Dentre os órgãos estudados, o crescimento do trato gastrointestinal e brânquias é mais precoce do que o do coração e fígado. Palavras-chave:Oreochromis niloticus. Curva de crescimento. Gompertz. Taxa de crescimento. *Autor para correspondência 1 Recebido ...

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Improving growth performance and caudal fin stripe pattern in selected F6–F8 generations of GIFT Nile tilapia (Oreochromis niloticus L.) using mass selection

Cited by 28 publications

References 16 publications

Weight gain and morphometric growth of genetically improved tambaqui (Colossoma macropomum)

Weight gain and morphometric growth of genetically improved tambaqui (Colossoma macropomum)

Caracterización genética de tres líneas de tilapia del Nilo (Oreochromis niloticus)

Use of mathematical models in the study of bodily growth in GIFT strain Nile tilapia

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