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Nutritional evaluation of two marine microalgae as feedstock for aquafeed
Author(s) -
Chen Yimin,
Wang Caijin,
Xu Changan
Publication year - 2020
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/are.14439
Subject(s) - dunaliella salina , biology , artemia salina , food science , penaeus monodon , nannochloropsis , fish meal , essential amino acid , essential nutrient , fish oil , oleic acid , nutrient , amino acid , microbiology and biotechnology , biochemistry , botany , algae , fish <actinopterygii> , shrimp , ecology , fishery , chemistry , organic chemistry , toxicity
Using microalgae for animal nutrition provides an economically viable route for microalgae‐based technological innovation, especially in combination with CO 2 fixation given current global warming. However, this technology still lacks sufficient evaluation for screening microalgae for specific animals; meanwhile, current studies show some prejudice regarding ‘essential’ or ‘non‐essential’ ingredients. The results show that Dunaliella salina and Nannochloropsis salina were able to accumulate high protein (30%–57%) and lipid (20%–46%) content without affecting the performance of CO 2 fixation, which reached 0.28 and 0.23 g L −1 day −1 respectively. Both species exhibited high quality of lipids and proteins for Penaeus monodon based on the profiling. The essential fatty acid indexes (EFAI) for N. salina and D. salina were 3.81 and 9.02 respectively. Butyric acid was found to be present in both D. salina (12.03%) and N. salina (4.87%) based on the total fatty acids (FAs). The essential amino acid indexes (EAAI) for D. salina and N. salina were 2.23 and 1.29 respectively. Arginine was the most abundant essential amino acid (EAA) in both D. salina (10.83%) and N. salina (13.35%) on the basis of total amino acids (AAs). This study comprehensively compares the nutritional quality of the two commercial marine microalgae of D. salina and N. salina with the potential to be used as sustainable sources of lipids and proteins to reduce or even replace the traditional fish oil and fish meal in aquafeeds.