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Substituting fishmeal with mixtures of wheat, corn and soya bean meals in diets for the white leg shrimp, Litopenaeus vannamei (Boone): effect on production parameters and preliminary economic assessment
Author(s) -
GarcíaUlloa Manuel,
HernandezLlamas Alfredo,
Jesús ArmentaSoto Styll,
RodríguezGonzález Hervey
Publication year - 2017
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/are.13306
Subject(s) - litopenaeus , shrimp , biology , fish meal , zoology , food science , meal , nutrient , fish <actinopterygii> , fishery , ecology
We analysed the effect on production and economic performance of juvenile Litopenaeus vannamei of isoproteic diets substituting fishmeal by 25%, 50%, 75% and 100% with mixtures of wheat, soya bean and cornmeals. In a laboratory trial, 10 juveniles m −2 (1.1 ± 0.1 g) were reared in 60‐L plastic containers using a recirculation system for 90 days. Three replicates were used to test each diet. A commercial diet serving as a reference and the diet with the highest content of essential amino acids (50% substitution, 6.46 ± 1.1 g) produced significantly higher shrimp final weight (7.12 ± 0.9 g, P < 0.05). There were not significant differences in specific growth rate and mean survival (85.9 ± 0.2%, P > 0.05). In a pond trial, 10 shrimp m −2 (1.08 ± 0.3 g) were cultivated in 1.5 m −3 cages for 35 days, testing the diets in triplicate. Final weight was significantly higher ( P < 0.05) when 100% substitution was used (10.89 ± 0.24 g), while survival did not differ significantly among diets ( P > 0.05). The optimal level of substitution was estimated at 86.0%. Apparently, nutrients contained in the diets combined well with natural feed available in the pond, up to a point where 7.3% of fishmeal inclusion is recommended. An economic analysis showed that 100% substitution produced the best results. We conclude that mixtures of wheat, corn and soya meals are potential alternatives to replace fishmeal effectively in diets for L. vannamei .