Effect of cultivation density and methods for Betaphycus gelatinus in outdoor composite tanks: Impacts on growth and carrageenan quality
Year: 2025
Type: article
Abstract: This study evaluates the effects of stocking density and cultivation methods on the growth and quality of Betaphycus gelatinus carrageenan in a 3 m³ composite tank system. Seaweed was collected from Thai An, Ninh Thuan, Vietnam, and cultured at densities of 2, 4, 6, and 8 kg/m³ using four methods: (1) culture in hanging net cages, (2) the long-line method, (3) culture on horizontal nets and (4) cultivation attached to artificial coral. The experiment was conducted over 90 days (from June to September 2022). Results showed that the 2 kg/m³ density achieved the highest growth rate, carrageenan content, and quality (p < 0.05) compared to other densities. Among the cultivation methods, mesh cages (1) yielded the lowest growth and carrageenan quality, while the remaining three methods showed no significant differences. This study is the first report on the successful cultivation of B. gelatinus in a 3 m³ composite tank, affirming that a stocking density of 2 kg/m³ along with the hanging rope, mesh frame, and artificial coral attachment methods are optimal choices for B. gelatinus cultivation.
Authors: Van Huynh Tran, Thi Thuy Hang Cao, Thanh Trung Vo, Anh Khoa Truong, Mai Duc Tran, Thi Mo Vu, Trong Nghia Le, Duc Thinh Pham, Truong Trung Lien Le, Duc Hung Pham, Hoang Nhu Khanh Huynh
Language: English
Subfield: Oceanography
Field: Earth and Planetary Sciences
Domain: Physical Sciences
SDGs: Life below water, Zero hunger
Open Access status: diamond
OpenAlex ID: W4409525862