Crecimiento de juveniles de la corvina aguada, Cynoscion squamipinnis (Perciformes: Sciaenidae) en cautiverio
Fecha
2016-07-31
Autores
Boza-Abarca, Jorge
Ramírez-Alvarado, Marvin
Barquero Chanto, Juan Esteban
Calvo-Vargas, Emilia
Berrocal-Artavia, Karen
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Editor
Universidad Nacional (Costa Rica)
Resumen
Peces juveniles de corvina aguada, Cynoscion squamipinnis, obtenidos a partir de desoves espontáneos en cautiverio fueron engordados por 355 días en la Estación de Biología Marina Juan Bertoglia Richards (Costa Rica). Ciento cincuenta y dos peces fueron sembrados en tanques de cuatro toneladas a una biomasa total de 82 g m-3, y alimentados con una dieta de 50% proteína, 17.5% carbohidratos, 11.8% lípidos, 16% ceniza y 5% humedad. El oxígeno disuelto fue de 7.12±1.13 mg L-1 (5.68 - 9.13 mg L-1), la salinidad de 31.92±1.65 ups (29.84 - 34.71 ups), y la temperatura de 27.54±0.63°C (26.50 - 28.60°C), condiciones similares a las del Golfo de Nicoya. El peso inicial promedio fue de 3.77±1.15 g (0.3 - 6.2 g). El peso promedio final fue de 132.60±32.96 g (78.5 - 219.3 g). El crecimiento (C) fue de 128.83 g, con una tasa de crecimiento (TC) de 0.36 g d-1, y una tasa específica de crecimiento (TEC) de 1.00 % PC d-1. La tasa de crecimiento relativa (TCR) fue de 0.0053 g g-1 d-1. El factor de conversión alimenticia (FCA) durante todo el periodo fue de 1.8±0.4. La corvina aguada tuvo un crecimiento menor al de otras corvinas, mostró un comportamiento tranquilo, aceptó la dieta peletizada y fue fácil de manipular, por lo que es candidata para la maricultura.
Juveniles of weakfish, Cynoscion squamipinnis hatchery-produced from spontaneously spawning in captivity, were grown during 355 days at Estación de Biología Marina Juan Bertoglia Richards (Biology Marine Station John Bertoglia Richards) in Costa Rica. One hundred fifty two fish were stocked in tanks of four tonnes to a total biomass of 82 g m-3, and feeding with a diet of 50% protein, 17.5% carbohydrate, 11.8% lipids, 16% ash and 5% humidity. Dissolved oxygen was 7.12±1.13 mg L-1 (5.68 - 9.13 mg L- 1), salinity of 31.92±1.65 ups (29.84 - 34.71 ups), and temperature of 27.54±0.63°C (26.50 - 28.60°C), similar to the Gulf of Nicoya conditions. Initial mean weight was 3.77(1.15 g (0.3 - 6.2 g). Final mean body weight was 132.60(32.96 g (78.5 - 219.3 g). The growth (G) was 128.83 g, with a growth rate (GR) of 0.36 g d-1, and Specific Growth Rate (SGR) of 1.00 % BW d-1. The Relative Growth Rate (RGR) was 0.0053 g g-1 d-1. The feed conversion (FCA) during the period was 1.8±0.4. The weakfish had a lower growth parameters than other croaker species, the fish showed a calm behavior, accepted the pelletized diet, and they were easy to handle, characteristics which confirm that weakfish as potential candidate for commercial mariculture.
Juveniles of weakfish, Cynoscion squamipinnis hatchery-produced from spontaneously spawning in captivity, were grown during 355 days at Estación de Biología Marina Juan Bertoglia Richards (Biology Marine Station John Bertoglia Richards) in Costa Rica. One hundred fifty two fish were stocked in tanks of four tonnes to a total biomass of 82 g m-3, and feeding with a diet of 50% protein, 17.5% carbohydrate, 11.8% lipids, 16% ash and 5% humidity. Dissolved oxygen was 7.12±1.13 mg L-1 (5.68 - 9.13 mg L- 1), salinity of 31.92±1.65 ups (29.84 - 34.71 ups), and temperature of 27.54±0.63°C (26.50 - 28.60°C), similar to the Gulf of Nicoya conditions. Initial mean weight was 3.77(1.15 g (0.3 - 6.2 g). Final mean body weight was 132.60(32.96 g (78.5 - 219.3 g). The growth (G) was 128.83 g, with a growth rate (GR) of 0.36 g d-1, and Specific Growth Rate (SGR) of 1.00 % BW d-1. The Relative Growth Rate (RGR) was 0.0053 g g-1 d-1. The feed conversion (FCA) during the period was 1.8±0.4. The weakfish had a lower growth parameters than other croaker species, the fish showed a calm behavior, accepted the pelletized diet, and they were easy to handle, characteristics which confirm that weakfish as potential candidate for commercial mariculture.
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Palabras clave
CORVINA, ACUICULTURA, BIOLOGIA MARINA, AQUACULTURE, MARINE BIOLOGY