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Volume 45 - Number 3 - 2010
Article

 


Effect of dietary and lipid level on growth performance and survival of juvenile spotted rose snapper Lutjanus guttatus

Mª Isabel Abdo de la Parra¹, L. Estela Rodríguez-Ibarra¹, Crisantema Hernández¹, Karina Hernández¹, Blanca González-Rodríguez¹, Irma Martínez-Rodríguez¹ y Armando García-Ortega¹

 

1Centro de Investigación en Alimentación y Desarrollo, A. C., Unidad Mazatlán, Av. Sábalo Cerritos s/n. Mazatlán, Sinaloa 89010, México

 

E-mail: abdo@ciad.mx

 

The spotted rose snapper (Lutjanus guttatus) is one of the most commercially important fish species in México. As it is considered a suitable candidate for culture, then it is necessary to identify its nutritional requirements in order to succeed. The aim of this study was to evaluate the effects of different protein and lipid levels on growth and survival of juvenile spotted rose snappers. Nine semi-purified diets were formulated with three protein levels (40, 45 and 50%) and three lipid levels (9, 12 and 15%). Hatchery-produced juvenile spotted rose snappers (2.2 ± 0.1 g) were used throughout the eight-week feeding experiment. Body weight, specific growth rate, condition factor, feed consumption, feed conversion rate, and survival were determined in each treatment at the end of the experiment. The highest weight gained and better feed conversion ratio were obtained in fish fed diets with 45 and 50% protein and their three lipids levels. Survival, feed consumption and condition factor were not affected by the treatments. These results indicate that juvenile spotted rose snappers require a minimum of 45% protein and 9% lipid for maximum growth and survival

 

Key words: Nutritional requirements, practical feeds, marine fish

 

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