Effect of larval density and diet on the growth and survival of Perna perna mussels in recirculation system (RAS)

• Autores: Mariane Silveira, Renata Gomes da Silveira Deminicis, Carlos Gomes, João Ferreira Netto, Francisco Squella, Claudio de Melo
• Localización: AquaTechnica: Revista Iberoamericana de Acuicultura, ISSN-e 2737-6095, Vol. 5, Nº. 2, 2023 (Ejemplar dedicado a: mayo-agosto En edición continua), págs. 80-90
• Idioma: español
• Títulos paralelos:
  • EFFECT OF LARVAL DENSITY AND DIET ON THE GROWTH AND SURVIVAL OF Perna perna MUSSELS IN RECIRCULATION SYSTEM (RAS).
  • Efecto de la densidad larval y la dieta sobre el crecimiento y supervivencia del mejillón Perna perna en sistemas de recirculación (RAS)
• Enlaces
  • Texto completo
• Resumen
  • español

    Este estudio evaluó el efecto de la densidad inicial de larvas y la concentración de microalgas en la dieta sobre el crecimiento y el número de larvas competentes (número de larvas vivas al final del experimento retenidas en un tamiz con un tamaño de malla de 210 µm) de Perna perna en un sistema de recirculación de agua (RAS). El experimento se llevó a cabo utilizando un diseño completamente al azar y un esquema factorial. El primer factor fue la concentración del alimento, que estuvo compuesto por una mezcla de Chaetoceros müelleri (CM) e Isochrysis galbana (ISO), en una proporción de 30:70, respectivamente, en tres niveles (bajo: entre 1,26 a 2,19, medio: entre 2,36 a 3,94 y alta: 5,03 a 7,29 x 104 células mL⁻¹). El segundo factor fue la densidad del cultivo larvario, también a tres niveles (20, 80 y 200 larvas mL⁻¹), con 3 repeticiones en cada tratamiento. Las larvas alimentadas con la dieta con bajas y altas concentraciones no alcanzaron la competencia (210 µm) en 16 días. Sin embargo, en el día 16, las larvas alimentadas con la concentración media (2,36 a 3,94 x 104 células mL⁻¹), alcanzaron en porcentaje promedio de larvas competentes 21,8% ± 7,45, 27,4% ± 9,91 y 0,80% ± 0,26 a las densidades 20, 80 y 200 larvas mL-1, respectivamente.

  • português

    This study evaluated the effect of initial larval stocking density and microalgae concentration in the diet on the growth and the number of competent larvae (number of live larvae at the end of the experiment retained on a sieve with mesh size of 210 µm) of Perna perna in a water recirculation system (RAS). The experiment was conducted using a completely randomized design and factorial scheme, with one factor being the food concentration at three levels (low: between 1.26 to 2.19, medium: between 2.36 to 3.94 and high: 5.03 to 7.29 x 104 cells mL⁻¹) and the second factor being the larval culture density, also at three levels (20, 80 and 200 larvae mL⁻¹), with 3 replications in each treatment. Larvae fed with the diet with low and high concentrations did not reach competence (210 µm) in 16 days. However, for larvae fed with the medium concentration (2.36 to 3.94 x 104 cells mL⁻¹), the average percentage of competent larvae, on day 16, was 21.8% ± 7.45, 27.4% ± 9.91 and 0.80% ± 0.26 at the densities 20, 80 and 200 larvae mL-1, respectively.

  • English

    This study evaluated the effect of initial larval stocking density and microalgae concentration diet on the growth and the number of competent larvae (number of live larvae at the end of the experiment retained on a sieve with mesh size of 210 µm) of Perna perna in a water recirculation system (RAS). The experiment was conducted using a completely randomized design and factorial scheme. The first factor was the food concentration, that was composed of a mix of Chaetoceros müelleri (CM) and Isochrysis galbana (ISO), in a proportion of 30:70 respectively, at three levels (low: between 1.26 to 2.19, medium: between 2.36 to 3.94 and high: 5.03 to 7.29 x 104 cells mL⁻¹). The second factor being the larval culture density, also at three levels (20, 80, and 200 larvae mL⁻¹), with 3 replications in each treatment. Larvae fed with the diet with low and high concentrations did not reach competence (210 µm) in 16 days. However, on day 16, larvae fed with the medium concentration (2.36 to 3.94 x 104 cells mL⁻¹), reached in average percentage of competent larvae 21.8% ± 7.45, 27.4% ± 9.91 and 0.80% ± 0.26 at the densities 20, 80 and 200 larvae mL⁻¹, respectively.