4 years ago

Effect of different ratios of dietary protein-energy on growth, body proximal composition, digestive enzyme activity, and hepatopancreas histology in Macrobrachium americanum (Bate, 1868) prawn juveniles

The effect of dietary protein:energy (P/E) ratio on growth performance, body composition, digestive enzyme activities, hematology, and hepatopancreas histology was tested in the juvenile cauque river prawn Macrobrachium americanum. Six diets with two different crude protein levels (350 and 400gkg1 diet) and three lipid levels (60, 100, and 140gkg1 diet) were tested on juveniles in a factorial manner (3×2) to provide six different dietary P/E ratios: 17, 18, 19, 20, 21, and 22mgCPkJ1 GEg1. The indicators of growth performance and nutrition were significantly influenced by the dietary P/E ratio; however, no significant survival differences were observed among treatments. The dietary protein–lipid levels (P/E ratios) influenced significantly the whole body protein, lipid, and carbohydrate contents; lipid content in the whole body increased significantly when the dietary lipid level was increased from 60 to 140gkg1 at the same protein levels. The total protease activity increased significantly with the increase in dietary protein at each lipid level. Total cholesterol and glucose concentrations in the serum were significantly affected by the different dietary P/E ratios and lipid levels. These results, using the principal component analysis (PCA) with the covariance matrix, suggest that the diet containing 350gkg1 protein level and 100gkg1 lipid level with P/E of 18mgCPkJ1 is optimal for cauque river prawn juveniles.

Publisher URL: www.sciencedirect.com/science

DOI: S0044848617311754

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.