Mass selection and inbreeding effects on a cultivated strain of Penaeus (Litopenaeus) vannamei in Venezuela

Donato, Marcos De; Manrique, Ramón; Ramírez, Raúl; Mayer, Luis; Howell, Chris

doi:10.1016/j.aquaculture.2005.02.005

Cited by 78 publications

(57 citation statements)

References 9 publications

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“…In the same L. vannamei populations as were studied by us, De Donato et al (2005) reported that the gain in growth rate produced by mass selection was 14.5% after 11 generations. In our study, the family selection system produced twice as high a gain (33.1%) in only two generations, demonstrating the effectiveness of the family selection system in improving growth rate in this strain of L. vannamei under the conditions stated.…”

Section: Discussionmentioning

confidence: 92%

“…Even though the lines used in our study have undergone a reduction in genetic variability following many years of closed cycle culture, as demonstrated by De Donato et al (2005), our h 2 estimations for growth (0.25) were higher than those (0.11) estimated by Goyard et al (2002). Furthermore, our h 2 estimates for growth were similar to those obtained for L. vannamei by Fjalestad et al (1999) and by Benzie et al (1997) for P. monodon, but much lower than that reported by Argue et al (2002) for L. vannamei andKenway et al (2006) for P. monodon.…”

Section: Discussionmentioning

confidence: 99%

“…We carried out family selection on four lines (denoted A, B, C and D) of a cultivated strain of L. vannamei which had been grown under closed cycle conditions for more than nine years, using a mass selection program in order to improve growth performance (De Donato et al, 2005). Family selection was used over the other types of selection schemes because it maintains control of the crossing and relationships between individual L. vannamei.…”

Section: Methodsmentioning

confidence: 99%

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Artificial family selection based on growth rate in cultivated lines of Litopenaeus vannamei (Decapoda, Penaeidae) from Venezuela

Donato

Ramírez²,

Howell³

et al. 2008

Genet. Mol. Biol.

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We investigated the effects of family selection on the growth rates of four genetic lines of Litopenaeus vannamei, the Pacific white shrimp, from Venezuela. The mean family weight at selection was 16.79 g and the mean growth rate was 0.169 g d -1 at a mean age of 138 days. The mean growth rates per generation were 0.141 g d -1 for the parental generation (P 0 ), 0.173 g d -1 for the F 1 and 0.191 g d -1 for the F 2 . Survival varied from 83.3% to 94.4%. There were statistically significant differences between lines, with lines B and C, growing at higher temperatures and lower salinities, showing the fastest growth. Regression analysis between growth rate and age for each genetic line showed high r 2 values, but smaller than those shown between growth rate and generation. The mean heritability (h 2 ) estimated for growth rate was 0.25 ± 0.04, with line per generation values ranging from 0.18 to 0.38. The mean heritability for growth rate per line showed some variation but there was no correlation between heritability and growth rate. Females showed a greater gain in growth rate per generation than males due to their faster growth when they were older. This study shows the high potential of these L. vannamei populations for the future of shrimp culture in the Americas.

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Section: Discussionmentioning

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Artificial family selection based on growth rate in cultivated lines of Litopenaeus vannamei (Decapoda, Penaeidae) from Venezuela

Donato

Ramírez²,

Howell³

et al. 2008

Genet. Mol. Biol.

Self Cite

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“…Sin embargo, la tasa de crecimiento en el ciclo largo fue similar a las obtenidas (0.76 a 0.87 g/semana) en estanques grandes en Venezuela desde 1990 hasta el 2002 con densidades de siembra parecidas (De Donato et al 2005).…”

Section: Discussionunclassified

Productividad y rentabilidad del cultivo de camarones marinos en el Golfo de Nicoya, Costa Rica

Valverde-Moya

Alfaro-Montoya²

2014

Rev. Mar. Cost.

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RESUMENEl objetivo del presente estudio es la evaluación de la productividad y la rentabilidad económica del cultivo comercial de camarones marinos en el Golfo de Nicoya, Costa Rica. El estudio se llevó a cabo en el 2013 en fincas comerciales localizadas en los sectores de Abangaritos de Puntarenas, Colorado de Abangares, Puerto Jesús de Nicoya y Lepanto de Puntarenas. Se sembraron 25.4 has en modalidad de 3 ciclos cortos y 24.6 has en modalidad de ciclo largo, siguiendo un plan de manejo convencional. La productividad en kg/ha/año fue superior en los 3 ciclos cortos (2 605 kg/ha/año) con respecto al ciclo largo (2 138 kg/ha/año). Los costos variables de producción fueron más altos en los ciclos cortos (US$ 8 389) que en el ciclo largo (US$ 6 783), debido a la utilización de dos tecnologías distintas de cultivo en cuanto a densidades de siembra, cosechas por año, tamaño del producto, precio en el mercado y recambios de agua. Los ingresos por concepto de ventas al pie de finca fueron más altos en los ciclos cortos (US$ 14 671/ha) que en el ciclo largo (US$ 12 281/ha). El estudio de sensibilidad económica sugiere la realización de 3 ciclos cortos en lugar de un solo ciclo largo, debido a la mayor productividad y rentabilidad (US$ 5 536/ha contra US $ 4 752/ha); sin embargo, la estrategia de producción no debe ser fija sino flexible para ajustarse al cambio, sobre todo del precio del producto en el mercado en esos momentos.Palabras claves: Decapoda, Penaeidae, Litopenaeus vannamei, cultivo comercial, camarones. ABSTRACTThe main objective of this study was to evaluate productivity and economic profitability of commercial culture of marine shrimp in the Gulf of Nicoya, Costa Rica. The study was conducted in 2013 in commercial farms located in Abangaritos de Puntarenas, Colorado de Abangares, Puerto Jesús de Nicoya and Lepanto de Puntarenas. A total of 25.4 ha in 3 short cycles and 24.6 ha in one long cycle were used, following a conventional management plan. Productivity in kg/ha/year was higher in the 3 short cycles (2,605 kg/ha/year) compared to the long cycle (2,138 kg/ha/year). Variable costs of production for the short cycles were higher (US$8,389) than those for the long cycle (US$6,783), due to the implementation of 2 different culture technologies concerning stocking densities, harvests per year, product size, market price and water exchange. Income from farm sales was higher for the short cycles (US$14,671/ha) than for the long cycle (US$12,281/ha). The economic sensitivity analysis suggests the implementation of 3 short cycles rather than one long cycle based on higher productivity and profitability (US$5,536/ha compared to US$4,752/ha); however, the production strategy must be flexible to adjust to changes, particularly regarding product market price at any given moment.

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“…The Pacific white shrimp Litopenaeus vannamei is one commercial species for the shrimp farming industry that has undergone a long history of genetic selection for performance improvement 1,2 . In selecting male and female broodstock for a breeding program, traits such as fecundity 3 , growth and disease resistance 4 are evaluated.…”

Section: Introductionmentioning

confidence: 99%

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Aungsuchawan¹,

Ball²,

Chapman³

et al. 2008

ScienceAsia

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Selection of male and female shrimp broodstock for the production of high-quality fry is a primary goal of selective breeding programs of economically important species. Mating a single male with multiple females or a single female with multiple males following by determination of the performance of the progeny is one approach for the selection of suitable male broodstock. In these experiments, a single female of the Pacific white shrimp Litopenaeus vannamei was mated to two males using artificial insemination with a mixture of two spermatophores, one from each male. Paternity of 50 individual postlarvae was determined at the PL5 stage with microsatellite genetic markers, by comparing genotypes of the offspring with those of the males and female. The study was done in three crosses and using three microsatellite loci. Paternity of the offspring was successfully determined and it was also found that, in two out of three crosses, the percentage of offspring generated from different males was significantly different (P<0.01). The method could be relevant for future selection of male broodstock with desirable traits.

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Mass selection and inbreeding effects on a cultivated strain of Penaeus (Litopenaeus) vannamei in Venezuela

Cited by 78 publications

References 9 publications

Artificial family selection based on growth rate in cultivated lines of Litopenaeus vannamei (Decapoda, Penaeidae) from Venezuela

Artificial family selection based on growth rate in cultivated lines of Litopenaeus vannamei (Decapoda, Penaeidae) from Venezuela

Productividad y rentabilidad del cultivo de camarones marinos en el Golfo de Nicoya, Costa Rica

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