Biometric and Fatty Acid Profile of the Brine Shrimp Artemia franciscana Enriched with Marine Microalgal Species belonging to Prymnesiophytes and Eustigmatophytes

Vikas, P A (2023) Biometric and Fatty Acid Profile of the Brine Shrimp Artemia franciscana Enriched with Marine Microalgal Species belonging to Prymnesiophytes and Eustigmatophytes. Journal of Krishi Vigyan, 11 (Suppl.). pp. 15-20. ISSN 2349-4433

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Abstract

Naturalized Artemia franciscana strains were collected from the Kelambakam hypersaline habitats along the Southeastern coast of India. Naturally occurring microalgae Nannochloropsis oculata, Dicrateria inornata, Pavlova viridis, and Isochrysis galabana has been used as Poly Unsaturated Fatty acid (PUFA) enrichment diet for Artemia nauplii. Artemia was enriched for different time intervals (0, 1, 3, 5, 7, 9 h) to find the optimum enrichment duration for the biometrical characters of the Artemia nauplii and to compare their suitability as fatty acid enrichment source. The length and width of Artemia nauplii enriched with microalgae exhibited a marginal increase up to 7 h of enrichment followed by a significant increase after 9h. Lipid contents of the nauplii enriched with N. oculata and I. galabana were high (26.20 and 26.25, respectively) at three hours of enrichment and observed a significant decrease at nine hours of enrichment. Total PUFA content of the Artemia nauplii enriched by I. galabana, P. viridis, and D. inornata was increased at seven hours of enrichment and on further enrichment (9 h), PUFA content was found to be significantly reduced. Maximum DHA was recorded in Artemia nauplii enriched with I. galabana (3.69% at 7 h), and it was found to be significantly higher than nauplii enriched with other microalgae. The microalgae-induced naupliar enrichment concerning essential PUFAs like DHA and EPA does not require more than 7 h enrichment while maintaining the naupliar size at their minimum for use in larval feeding.

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