4 years ago

Effect of fishmeal replacement with a vegetable protein mixture on the amino acid and fatty acid profiles of diets, biofloc and shrimp cultured in BFT system

The objective was to evaluate the effect of fishmeal replacement on amino acid and fatty acid profiles of diets, biofloc and shrimp cultured in low water salinity (5‰). A commercial feed and four experimental diets elaborated using different combinations of meals (fish, corn, sorghum, wheat and soybean) were assessed. The feeds were labeled as C, 0, 10, 20 and 30; where C corresponded to the commercial feed while the other four were experimental feeds with a fishmeal content of 0, 100, 200 and 300gkg1. At the end of the culture, fatty acids (FA) and amino acids (AA) profiles were determined in biofloc, shrimp and pelleted feeds. To relate the AA quality of biofloc and feed, the essential amino acid ratio (A/E), and essential amino acid index (EAAI) were estimated. The water quality parameters, as well as the productive response of L. vannamei were statistically similar among treatments. The n3/n6 ratio varied widely among treatments (0.53–1.23 in feed and 0.46–0.93 in biofloc) without a tendency related to the fishmeal content. Nevertheless n3/n6 ratio of shrimp showed similar values (1.23–1.58). The EAAI in feed was above 0.90 in all treatments, except for 0; but in biofloc exhibited values above 0.87 in all cases. Except to 0 feed, the evidence indicates that in BFT, the fatty acid and amino acid composition of biofloc and shrimp are independent of the fishmeal included in the feed. The results suggest that biofloc could provide high quality protein and essential fatty acids in situ to compensate the partial fishmeal substitution.

Publisher URL: www.sciencedirect.com/science

DOI: S0044848617313388

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.