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Title: Effect of dietary protein level on the development of juveniles of Macrobrachiun tenellum (Smith, 1871) [Efecto del nivel proteico de la dieta sobre el desarrollo de juveniles de Macrobrachium tenellum (Smith, 1871)]
Author: Espinosa-Chaurand, L.
Flores-Zepeda, C.
Nolasco-Soria, H.
Carrillo-Farnes, O.
Vega-Villasante, F.
Issue Date: 2012
Abstract: Objective: To evaluate the effect of five levels of crude protein (CP) in balanced feed on the survival, growth and feed conversion ratio (FCA) in juveniles of Macrobrachium tenellum. Materials and methods: Juveniles of M. tenellum (0.31�0.01g and 32.62�1.10mm) were fed for 60 days with 20, 25, 30, 35 and 40% of CP in feed. The organisms were randomly distributed in 15 experimental tanks (15 org /tank) under controlled conditions (5.95�0.41 ppm of oxygen, 29.89 � 0.72 �C, and pH 8.44�0.15) and fed with 10% of its live weight. Results: The survival percentage was 98.22�3.96% with no statistical difference between treatments (p>0.05). The organisms fed with 40% CP in their diet had a significantly higher weight (p<0.05) compared to the other treatments (weight change of 0.54�0.02g; weight increase 173.60�12.99%, and specific growth rate of 1.68�0.08). The FCA was significantly better (p<0.05) in organisms fed with 35 and 40% CP (2.85�0.18 and 2.40�0.05, respectively) than other treatments. Conclusions: Juveniles of M. tenellum fed with high protein levels (40%) developed faster than organisms which received a lower concentration of the protein under the experimental conditions established for this study.
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