Evaluation of microalgae as sources of digestible nutrients for monogastric animals
Journal Title: Journal of Animal and Feed Sciences - Year 2011, Vol 20, Issue 1
Abstract
The study was carried out to evaluate three microalgae as potential nutrient sources in diets for monogastric animals. In a digestibility experiment with adult mink (Mustela vison), the microalgae Nannochloropsis oceanica, Phaeodactylum tricornutum and Isochrysis galbana were fed at 60, 120 and 240 g kg-1 as is, replacing fish meal. The N. oceanica and P. tricornutum had similar crude protein (CP) content (47.7 and 49.0% of DM, respectively), amino acid composition and lipid content (8.4 and 7.4%, respectively), whereas I. galbana contained 20.1% CP and 16.2% lipids. There was a significant linear reduction in CP digestibility with increasing dietary inclusion of all algae products. The apparent CP digestibility determined by linear regression for N. oceanica, P. tricornutum and I. galbana was 35.5, 79.9 and 18.8%, respectively. The individual amino acid digestibilities showed acceptable values for P. tricornutum, but low and highly variable values for N. oceanica and I. galbana. Although the algae contributed a minor proportion of dietary lipids, lipid digestibility declined with increasing inclusion of all algae and especially with the highest level of N. oceanica. It was concluded from the mink study that among the investigated algae, P. tricornutum was the preferable source of digestible nutrients.
Authors and Affiliations
A. Skrede, L. T. Mydland, Ø. Ahlstrøm, K. I. Reitan, H. R. Gislerød, M. Øverland
Keywords
Related Articles
- EP ID EP74724
- DOI -
- Views 107
- Downloads 0
The effect of conjugated linoleic acid isomers, selenite and selenized yeast supplemented to the diet on the fatty acid profile in the pancreas of rats
The influence of dietary conjugated linoleic acid (CLA) isomers (CLAmix) and/or Se as Na2 SeO3 (SeIV) or selenized yeast (SeY) on the relative body weight gain (RBWG) of rats, pancreas weight, concentrations of CLA isome...
Nanobiotechnology in reproduction– pros and cons. A review
The phenomenal development of nanobiotechnology in the twenty-first century has opened the door to exciting progress in medical nanoapplications. Nanotechnology promises a revolution in medicine to improve or create nove...
Evaluation of chemical composition, in situ degradability and in vitro gas production of ensiled and sun-dried mulberry pomace
The study was conducted to evaluate the nutritive value of mulberry pomace (MP) treated with sun-drying (SD), ensiling (EN), and ensiling with a Lactobacillus additive (ELA), respectively. The chemical composition, in si...
Estimation of substrate-energetic fluxes in lactating cows
In this article an algorithm estimating the basic metabolic fluxes in lactating cows is described that uses data of substrates absorption, heat production, respiratory quotient and milk productivity. The flux diagram per...
Effect of an inoculant and enzymes on fermentation quality and nutritive value of erect milkvetch (Astragalus adsurgens Pall.) silages
The objective of this experiment was to determine the ensiling characteristics, microbial changes and in vitro degradation of erect milkvetch (Astragalus adsurgens Pall.) treated with different additives. Erect milkvetch...