Use of seaweed Ulva lactuca for water bioremediation and as feed additive for white shrimp Litopenaeus vannamei
- Subject Areas
- Aquaculture, Fisheries and Fish Science, Environmental Contamination and Remediation
- Feed additive, Seaweed, Shrimp, Water quality
- © 2017 Elizondo-González et al.
- This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ Preprints) and either DOI or URL of the article must be cited.
- Cite this article
- 2017. Use of seaweed Ulva lactuca for water bioremediation and as feed additive for white shrimp Litopenaeus vannamei. PeerJ Preprints 5:e3446v1 https://doi.org/10.7287/peerj.preprints.3446v1
Two experimental feeding trials were conducted during 4 weeks to evaluate the use of Ulva lactuca in shrimp culture: 1) for wastewater bioremediation in a water integrated system with U. lactuca, and 2) using different inclusion levels of U. lactuca meal in shrimp feed. In feeding trial 1, shrimp reared under integrated system with U. lactuca (SWE) resulted in similar growth and feed utilization as shrimp reared with normal water exchange (CWE). Shrimp under no water exchange (NWE) resulted in significant lower growth and higher feed conversion rate (FCR) compared to the other treatments (p < 0.05). Nitrogen compounds and phosphate in water from SWE and CWE treatments did not present significant differences during the experimental trial (p > 0.05). In feeding trial 2, seaweed biomass produced by wastewater bioremediation in SWE treatment were dried and ground to formulate diets containing 0, 1, 2, and 3% U. lactuca meal (0UL, 1UL, 2UL, and 3UL). Shrimp fed the 3UL diet resulted in a significant (p < 0.05) improvement of shrimp growth and FCR, and enhanced whole body lipid and carotenoid content by 30 and 60%, respectively, compared to control diet. Seaweed U. lactuca is suggested as a desirable species for wastewater bioremediation in integrated aquaculture systems, and its meal as good feed additive for farmed shrimp.
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