First successful trial of seaweed (Kappaphycus alvarezii) cultivation in Karnataka, India

Rajesh, K M and Thomas, Sujitha and Ail, Sunil S and Viswambharan, Divya and Dharshan, K S and Akhila, U A and Harshitha, R and Luhai, Abdul and Dineshbabu, A P and Johnson, B and Narasimha Murthy, L N and George, Grinson (2025) First successful trial of seaweed (Kappaphycus alvarezii) cultivation in Karnataka, India. Indian Journal of Fisheries, 72 (4). pp. 146-150. ISSN 0970-6011

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Abstract

This study highlights the successful raft-based cultivation of Kappaphycus alvarezii in the Yadamavinahole Estuary, Uppunda, Karnataka over a period of 72 days during pre-monsoon season (February to April, 2025). A total of 20 net tubes were deployed, yielding 180 kg of fresh biomass and the mean biomass per tube was 8.94 ± 0.10 kg. The growth performance was promising with a specific growth rate of 2.06±0.04% day⁻¹ and a daily growth rate of 2.16 ± 0.03% day⁻¹. Optimal water quality conditions supported consistent growth. The trial success underscores the potential for scalable seaweed farming in the region and provides essential insights for enhancing future commercial cultivation practices.

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