9 resultados para PIENSOS

em Acceda, el repositorio institucional de la Universidad de Las Palmas de Gran Canaria. España


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[EN]The effect of dietary inclusion of sea urchin meal (Diadema antillarum) on growth and feed utilization was investigated in a growth trial with red porgy (Pagus pagrus) of 208g initial body weight, during 6 month feeding period. High quality fish meal and fish oil diet was used as a control (Diet C); urchin meal was included at 8% and 16% dietary levels (EM8 and EM16). Compared to the control diet higher values for absolute and relative final weight and SGR were obtained either for fish fed EM8 and EM16 diets; for the latter diets values for FCR and final HSI were significantly smaller respect to those for the control diets. No differences were found among diets for the total feed intake, VSI and K factor. Obtained results indicate the suitability of the sea urchin meal as alternative ingredient in diets for the red porgy, improving fish growth and feed utilization. More studies are being done at the moment in red porgy and other fish species in order to better determine the optimum dietary levels taking into account other important culture and quality parameters.

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[EN]The inclusion of two different crab meals in diets on fillet quality parameters was investigated in a six month growth trial with red porgy (Pagus pagrus). A high quality fish meal and fish oil diet was used as a control (Diet C). Fish meal protein in the control diet was replaced by increasing levels of protein from a river crab meal (Procamburus clarkii) (CR) and a marine crab meal (Chaceon affinis) (CM) at 10% and 20% each of them. The inclusion of both crab meals in diets, either at 10% and 20% substitution levels, did not affect the texture quality parameters of flesh except for the adhesiveness, where animal fed on CR20 showed the smallest value respect to those fed the Diet C. Compared to the control fish, a reduction of the fillet lipid oxidation indicated by the Tbars index was observed for fish fed both crab meal based diets, at the higher inclusion level (20%). Increasing dietary levels of the marine crab meal showed an increment of the monoenoicos, n-9 and oleic fatty acid content in the fillets. Results indicate that both crab meals used in present study are suitable as alternative ingredients for red porgy diets in terms of fish flesh quality.

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[EN] The effect of dietary inclusion of two type of crab meal on growth, feed utilization and skin coloration performance was investigated in a growth trial with red porgy (Pagrus pagrus) of 233g initial body weight, during 6 month feeding period. High quality fish meal and fish oil diet was used as a control (Diet C). Protein of fish meal in the control was replaced by increasing dietary levels of protein derived from a river crab meal (Procamburus clarkii) (CR) and a marine crab meal (Chaceon affinis) (CM) at 10% and 20% each of them. Regarding growth results, fish fed the CM20 diet showed the highest values in absolute final weight and percent of the initial weight. For animals fed the crab meal based diets, the colour result was better than that of fish fed the control one, showing skin redness similar to that of the wild specimens. For both ingredients, increasing dietary inclusions were accompanied for an increment of the colour saturation, being in this case the obtained value for the CR meal higher than those for the CM meal. Present results indicate that crab meals used in this study are suitable as partial replacers for fish meal in diets for the red porgy.

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[ES] La acuicultura como medio de producción de alimento para consumo humano ha experimentado una gran expasión a lo largo de los últimos cincuenta años, incrementando su producción a razón de un 9-10% anual durante los últimos 10 años, muy por encima del 4-5% del resto de los animales de granja. Entre otros factores, la mejora tecnológica de los piensos y adecuación de los mismos a las necesidades nutricionales de los animales han sido determinantes para el desarrollo del sector. Se mostrará la evolución histórica de los piensos acuícolas, estado actual de los mismos y proyecciones futuras

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[ES] El Jurel dentón (Pseudocaranx dentex) es una de los peces marinos mas apreciados en el mercado Japonés, donde se utiliza para la preparación del tradicional shashimi ( pescado crudo, lo que hace que sea uno de los Carángidos que alcaza mayores precios. En Europa por el contrario es una especie prácticamente desconocida, aunque sea un merodeador habitual de las jaulas de engorde de Dorada y Lubina en el Mediterráneo e Islas Canarias. Para este estudio se capturaron 400 juveniles salvajes, que tras un periodo de aclimatación a cautividad se engordaron en dos sistemas de cultivo, Jaulas y tanques con diferentes piensos comerciales de Dorada por un periodo de 11 meses. Los peces engordados en jaulas mostraron un crecimiento y supervivencia significativamente superior al de los mantenidos en tanques. El crecimiento moderadamente rápido de esta especie la confirma como un candidato potencial para la diversificación de la acuicultura marina en las Islas Canarias.

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Programa de doctorado: Acuicultura: producción controlada de organismos acuáticos

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Doctorado: Acuicultura sostenible y Ecosistemas Marinos. Grupo de Investigación en Acuicultura. Precede al tít.: Lo que se come__ ¿se cría?