Crecimiento de juveniles de congrio colorado Genypterus chilensis en condiciones de cultivo
Crecimiento de juveniles de congrio colorado Genypterus chilensis en condiciones de cultivo
Authors
Vega Aguayo, Rolando
Estrada Arias, Juan
Ramírez Cárcamo, Diego
Flores, Camila
Zamorano Parraguez, José
Encina Montoya, Francisco
Mardones Lazcano, Alfonso
Valdebenito Isler, Iván
Dantagnan Dantagnan, Patricio
Estrada Arias, Juan
Ramírez Cárcamo, Diego
Flores, Camila
Zamorano Parraguez, José
Encina Montoya, Francisco
Mardones Lazcano, Alfonso
Valdebenito Isler, Iván
Dantagnan Dantagnan, Patricio
Authors
Date
Datos de publicación:
10.3856/vol43-issue2-fulltext-11
Keywords
Acuicultura - Crecimiento - Congrio colorado
Collections
Abstract
El congrio colorado Genypterus chilensis (Guichenot, 1848) es un pez altamente demandado por
el mercado chileno. Las capturas han disminuido y mantenido bajo 1.000 ton anuales en la década 2000-2010 con un precio de US$7 kg-1 . El objetivo de este trabajo fue evaluar el crecimiento de juveniles de primera generación producida de padres silvestres en condiciones de cultivo. Se estimó el crecimiento de 128 juveniles durante cinco meses en el hatchery del CIMARQ, Valparaíso, Chile, distribuidos en cinco grupos de talla en estanques con agua marina (35 g L-1) y rango de temperatura de 12-14°C. Los pesos promedios iniciales varíaron desde el grupo menor de 4 g (11 cm) al mayor de 23 g (18 cm). Estos fueron alimentados con pellet comercial para peces marinos. Se midió mensualmente la longitud total (cm), peso (g) y se estimó sus promedios, porcentaje de crecimiento en peso, tasa de crecimiento específico, coeficiente de crecimiento termal y factor de conversión. A los cinco meses el grupo menor alcanzó un peso promedio de 16 ± 7 g (16 ± 2 cm) y el mayor 75 ± 17 g (27 ± 6 cm). Los pesos promedios mensuales se ajustaron con R2 = 0,9 a las ecuaciones P = 3,845e0,300t y P = 20,63e0,240t. Los factores de conversión fluctuaron entre 8,6 y 0,3 al mes 5 para el grupo menor y de 0,6 a 0,2 para el mayor. Si se proyecta el crecimiento desde el peso inicial de 4 y 23 g hasta el peso de cosecha de 2 kg, éste se obtendría entre 26 y 18 meses para los grupos menor y mayor respectivamente.
The cusk eel Genypterus chilensis (Guichenot, 1848) is a fish demanded by the Chilean market. Their catches have remained under 1,000 ton per year in the decade 2000-2010, at a price of US$7 kg-1 . The aim of this study was to evaluate the growth of first generation juveniles produced by wild parents in culture conditions. Growth of 128 juveniles was estimated for five months in the hatchery of CIMARQ, Valparaiso, Chile, distributed into five size groups in tanks with seawater (35 g L-1), and temperature range: 12-14°C. Initial averages weight ranging from lower to the larger group 4 g (11 cm) to 23 g (18 cm). They were fed with commercial marine fish pellets. Total length, weight, estimated average, percentage of weight growth, specific growth rate, coefficient of thermal growth and feed conversion rate were monthly measured. The lower group at 5 months reached an average of 16 ± 7 g (16 ± 2 cm) and the largest group 75 ± 17 g (27 ± 6 cm). Their monthly average were adjusted with R2 = 0.9 to the equations P = 3,845e0,300t and P=20,63e0,240t. Monthly feed conversion rates ranged from 8.6 to 0.3 at month 5 for the lower group and from 0.6 to 0.2 for the larger. Projected growth from the initial weight of 4 and 23 g to harvest weight of 2 kg could be obtained between 26 and 18 months for the smaller and larger group respectively
The cusk eel Genypterus chilensis (Guichenot, 1848) is a fish demanded by the Chilean market. Their catches have remained under 1,000 ton per year in the decade 2000-2010, at a price of US$7 kg-1 . The aim of this study was to evaluate the growth of first generation juveniles produced by wild parents in culture conditions. Growth of 128 juveniles was estimated for five months in the hatchery of CIMARQ, Valparaiso, Chile, distributed into five size groups in tanks with seawater (35 g L-1), and temperature range: 12-14°C. Initial averages weight ranging from lower to the larger group 4 g (11 cm) to 23 g (18 cm). They were fed with commercial marine fish pellets. Total length, weight, estimated average, percentage of weight growth, specific growth rate, coefficient of thermal growth and feed conversion rate were monthly measured. The lower group at 5 months reached an average of 16 ± 7 g (16 ± 2 cm) and the largest group 75 ± 17 g (27 ± 6 cm). Their monthly average were adjusted with R2 = 0.9 to the equations P = 3,845e0,300t and P=20,63e0,240t. Monthly feed conversion rates ranged from 8.6 to 0.3 at month 5 for the lower group and from 0.6 to 0.2 for the larger. Projected growth from the initial weight of 4 and 23 g to harvest weight of 2 kg could be obtained between 26 and 18 months for the smaller and larger group respectively