Nutrients and Energy Digestibility of Microalgal Biomass for Fish Feed Applications

Sustainability

Shoyeb Khan¹  Mahmoud I. A. Thaher¹  Chandan Mahata¹  Senthil Nagappan Annamalai¹  Hareb Al Jabri¹  Probir Das¹  Mohammad Abdul Quadir¹ 

[1] Algal Technology Program, Center for Sustainable Development, College of Arts and Sciences, Qatar University, Doha P.O. Box 2713, Qatar;

关键词: microalgae;    aquafeed;    protein;    digestibility;    lipid;   

DOI  :  10.3390/su132313211

来源: DOAJ

【 摘 要 】

Aquafeed accounts for at least 75–90% of aquaculture’s operating costs. Traditional aquafeed ingredients such as fishmeal, fish oil, and soybean meal are unsustainable; further, their increasing cost necessities developing alternative feed ingredients. Microalgae-based aquafeed is not only environmentally friendly, but it can also be cost-effective with proper optimization. In addition, the nutrition profile of microalgae is similar to that of many fishes. The digestibility of a feed is one of the most important factors to consider in feed formulation. A highly digestible feed can lower production costs, reduce feed waste, and reduce the risk of eutrophication. This review discusses the digestibility of various nutrients such as protein, lipid, carbohydrate, amino acids, and fatty acids (including omega-3 fatty acids), dry matter, and energy of various microalgae in fish. Other commonly used aquafeed ingredients were also compared to microalgae in terms of nutrient and energy digestibility in fish. The intrinsic characteristics of microalgae, biomass pretreatment, and feed preparation methods are all discussed as factors that contribute to the nutrient and energy digestibility of microalgae in fish. Furthermore, methods for increasing the digestibility of microalgal biomass in fish are suggested. Finally, the review concludes with the challenges and prospects of using microalgae as a fish feed in terms of digestibility.

【 授权许可】

Unknown