GROWTH OF JUVENILE MARINE SILVERSIDE (Odontesthes regia Humboldt, 1821) (Atherinidae) IN SEA NET PEN CAGES CRECIMIENTO DE JUVENILES DE PEJERREY (Odontesthes regia Humboldt, 1821) (Atherinidae) EN BALSAS JAULAS

• Main Authors: Francisco A Orellana, Héctor E Toledo
• Format: Article in Journal/Newspaper
• Language: English; Spanish
• Published: Universidad de Concepción 2007
• Subjects: Crecimiento de juveniles; pejerrey de mar; balsas jaulas; Juvenile growth; marine silverside; sea net pen cages; Oceanography; GC1-1581; Zoology; QL1-991; Blanco; Roja; Atlantic salmon
• Online Access: https://doaj.org/article/9154c7eb222243b28d16231d11410e89

Juvenile silversides (Odontesthes regia Humboldt, 1821) reared in a sea net pen system performed well and adapted rapidly to this type of confinement. Values obtained for growth and mortality parameters in a period of 12 months, are similar to those observed in other marine fish cultured at industrial levels. The value of SGR obtained for the whole period (0.57), was similar to the value obtained in trials with juvenile rainbow trout using 20% replacement of fishmeal with white lupin meal (Lupino albus), over a period of 6 months (SGR=0.58), but lower in relation to trials performed with red tilapia fry (Oreochromis aureus x Oreochromis niloticus) fed with coffee pulp diet (20% fishmeal replacement) where SGR was 1.51, or when compared with Japanese seabass (Lateolabrax japonicus) fed with rations based on 30% fishmeal replacement with soybean meal (SGR=2.98) over a 153 days trial. Mortality rate observed during the 12 months for the marine silverside reared in sea net pens, was in the range of typical values observed for rainbow trout reared in freshwater (17,9 % in 14 months), or for Atlantic salmon in freshwater (22 % from egg to smolt in 13 months); but lower in relation to mortality observed on Japanese seabass (50.7 %) and red tilapia (34,5 %), where the experimental period was about half of Odontesthes regia. Juveniles de pejerrey de mar cultivados en un sistema de balsas jaulas se comportaron bien adaptándose rápidamente a este tipo de confinamiento. Los valores de crecimiento y mortalidad obtenidos en un período de 12 meses son similares a los observados en otros peces marinos cultivados a escala industrial. El valor de SGR obtenido para todo el período (0.57) fue similar al valor obtenido en ensayos con juveniles de trucha arcoiris, usando 20% de lupino blanco (Lupino albus) en reemplazo de harina de pescado para un período de 6 meses (SGR=0.58), pero inferior en relación a ensayos realizados con alevines de tilapia roja (Oreochromis aureus x Oreochromis niloticus) alimentados con pulpa de café (20% de ...