Evaluation of amaranth (Amaranthus caudatus L.) and quinoa (Chenopodium quinoa) protein sources as partial substitutes for fish meal in Litopenaeus vannamei grow‐out diets |
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| Authors: | César Molina‐Poveda Ricardo Cárdenas Miguel Jover |
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| Affiliation: | 1. CENAIM‐ESPOL, Escuela Superior Politécnica del Litoral (ESPOL), Guayaquil, Ecuador;2. Biodiversity and Aquaculture Group, Institute of Animal Science and Technology, Universitat Politècnica de Valencia, Valencia, Spain |
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| Abstract: | Two groups of isonitrogenous diets formulated by replacing 15%, 25%, 35% and 45% of fish meal protein by amaranth meal and quinoa meal were used to evaluate the performance of Litopenaeus vannamei. Growth showed significant reduction (P < 0.05) in the group of shrimp fed with amaranth diets, with diet A15 showing the best specific growth rate (SGR = 2.81% day?1), but after the control diet AQ0 (3.07% day?1). Diet A15 had significantly (P < 0.05) the best digestibility of dry matter (79.7%) and protein (88.4%) without differences compared to control diet AQ0 (75.1% and 85.2%). Replacement with quinoa meal at any level tested did not significantly affect (P > 0.05) the shrimp growth performance. Shrimp fed with quinoa diets showed better SGR (3.05% day?1) than those shrimp fed with amaranth (2.56% day?1). No differences in feed conversion ratio appeared in either of the protein sources, but quinoa diets presented a better average (3.13) than amaranth diets (4.01). The apparent digestibility of dry matter and protein for quinoa diets was similar for all diets, but they were statistically different (P < 0.05) from the control diet. We conclude that quinoa meal can replace fishmeal up to 45%, whereas it can be replaced with amaranth meal up to 15%, without adverse effects on growth and survival. |
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| Keywords: | plant protein shrimp growth digestibility fishmeal replacement |
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