Efecto de diferentes niveles de proteína y lípidos totales en la dieta sobre el crecimiento y supervivencia de juveniles de pargo lunarejo Lutjanus guttatus

Abstract

Abstract.-The spotted rose snapper (Lutjanus guttatus) is one of the most commercially important fish species inMéxico. 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.

Replacement of fish meal by poultry by product meal, food grade, in diets for juvenile spotted rose snapper (Lutjanus

“…guttatus requires protein and lipid values ranging from 45 to 50% and 9 to 15%, respectively, and its diet is mainly based on fish meal as the dietary protein source (Abdo de la Parra et al, 2010a). The limited fish meal supply, coupled with the increasing demand for fish meal, has greatly inflated the cost of this commodity (Tacon & Metian, 2008).…”

Hepatocellular steatosis as a response to nutritional stressors in Lutjanus guttatus (Steindachner, 1869) grown in floating cages: a case study

“…In the present study, the proximate analysis of the test feed used by the fishermen during the fattening stage showed that the average concentration of lipids was 20.4%; this could be the main trigger of HE. The average protein concentration in these samples was 30.2%, which would classify it as low-protein diet, compared with other studies in which the concentration of proteins required by the diet is higher than 50% (García-Ortega, 2009;Abdo de la Parra et al, 2010). Although the studies conducted on fish do not mention it, in domestic animals the lack of protein is considered a crucial factor for the development of hepatocellular Figure 1.…”

“…Since lipid metabolism is mainly regulated by the liver, including the synthesis and degradation of fatty acids, an unbalanced diet could affect the structure and function of the liver (Roberts & Ellis, 2012); thus, providing an adequate diet to marine fish is especially important (García-Ortega, 2009;Abdo de la Parra et al, 2010).…”

Evaluacion de dietas comerciales en el crecimiento y su efecto en la composicion bioquimica muscular de juveniles de chita, Anisotremus scapularis (Tschudi, 1846) (Familia: Haemulidae).

“…Se ha demostrado que los peces marinos carnívoros requieren altos niveles proteicos (40-60%) y lipídicos (6-15%) para lograr un óptimo crecimiento (De la Parra et al, 2010). Al respecto, A. scapularis, es una especie marina y carnívora (Medina et al, 2004) que requiere un régimen proteico elevado.…”

“…Se ha afirmado que la cantidad de alimento consumido depende de la proporción de proteína y energía de la dieta, indicando que a una mayor concentración de energía reduce la ingestión del alimento y viceversa (Poniak et al, 2004;Escobar et al, 2006;De la Parra et al, 2010). Sin embargo, también se ha postulado que para un organismo el flujo de asimilación se realiza a través de una superficie; por lo tanto, la tasa de ingestión sería una función potencial de la longitud al cuadrado (Kooijman, 2009).…”