Nutritional Contribution of Biofloc within the Diet of Growout and Broodstock of Litopenaeus vannamei,Determined by Stable Isotopes and Fatty Acids |
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| Authors: | Edén Magaña‐Gallegos Rodrigo González‐Zúñiga Gerard Cuzon Miguel Arevalo Eduardo Pacheco Manuel A J Valenzuela Gabriela Gaxiola Elisa Chan‐Vivas Korinthia López‐Aguiar Elsa Noreña‐Barroso |
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| Institution: | 1. Posgrado en Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México;2. Av. Ciudad Universitaria 3000, Coyoacán, Ciudad de México, México;3. Facultad de Ciencias UNAM, Unidad Multidisciplinaria de Docencia e Investigación, Sisal, Yucatán, Mexico;4. Centro de Investigación Científica de Yucatán A. C., Unidad de Recursos Naturales, Calle 43 No. 130, Chuburná de Hidalgo, Mérida, Yucatán, Mexico;5. Facultad de Química UNAM, Unidad de Química Sisal, Sisal, Yucatán, Mexico |
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| Abstract: | The relative contributions of feed sources were determined through the isotopic signal (δ13C and δ15N) and fatty acid profile of feed items, shrimp muscle, and eggs of Litopenaeus vannamei reared in a biofloc system. In the growout phase, the isotope analysis showed the biofloc particle size class ≥250 μm contributed 55–100%; size ≥50 < 250 μm contributed 0–22%; and artificial feed contributed 0–45%. Principal component analysis applied to fatty acid profiles showed that biofloc ≥250 μm and artificial feed were the most important items in shrimp growout. For the egg production, isotope analysis suggested that the most important feed sources according to their relative contributions were polychaetes (0–100%), followed by artemia biomass (0–86%) and semi‐moist feed (0–66%), with lower contributions from squid, mussel, and the muscle of L. vannamei broodstock that had been cultured in biofloc. In terms of fatty acids, the most important items were artemia, polychaetes, and semi‐moist feeds. This work clarified the importance of feed sources for shrimp during culture in biofloc systems and during reproduction. Analysis of stable isotopes and fatty acids can be successfully used to trace the assimilation of nutrients during the nutrition of shrimp. |
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| Keywords: | biofloc broodstock feed sources multiphasic diet shrimp stable isotopes |
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