Research Article

Effects of inorganic nutrient enrichment on the carrageenan yield, growth, and ice-ice disease occurrence of red alga Kappaphycus striatus

Volume: 5 Number: 2 April 1, 2022
EN

Effects of inorganic nutrient enrichment on the carrageenan yield, growth, and ice-ice disease occurrence of red alga Kappaphycus striatus

Abstract

One of the problems in Kappaphycus farming is the slow growth in some farms due to nutrient insufficiency caused by overstocking. In the southern Philippines, most seaweed farmers practice inorganic nutrient enrichment of Kappaphycus to boost growth and decrease ice-ice disease occurrence using ammonium phosphate at an average concentration of 8.82 g L-1. In this study, experiments with Kappaphycus striatus enriched with inorganic nutrients were carried out at Pasiagan, Bongao, Tawi-Tawi, southern Philippines, using different inorganic nutrients (T1=8.82 g L-1 of urea, T2=8.82 g L-1 of phosphorus, and T3=control) within 45 days. Seaweeds were enriched in these three inorganic solutions for 30 seconds, placed into a large mat, covered with canvas, and left overnight. After 15 days, findings showed that the specific growth rates of T1 (6.99% day-1) and T3 (6.72% day-1) groups were significantly higher than the T2 (5.84% day-1) group (p<0.05). Inorganic nutrient enrichment did not significantly influence the occurrence of ice-ice disease. Moreover, inorganic nutrient enrichment did not affect the carrageenan yield after 45 days. K. striatus nutrient-enriched with urea could increase growth at day 15, but no effect on the occurrence of ice-ice disease and carrageenan yield. Hence, inorganic nutrient enrichment using urea provides a positive effect to farmed K. striatus by enhancing its growth without affecting its health and carrageenan yield. 

Keywords

Thanks

The authors are grateful to the Bureau of Fisheries and Aquatic Resources (BFAR) and Mindanao State University Tawi-Tawi College of Technology and Oceanography (MSU-TCTO), College of Fisheries (COF).

References

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Details

Primary Language

English

Subjects

Maritime Engineering (Other)

Journal Section

Research Article

Publication Date

April 1, 2022

Submission Date

September 24, 2021

Acceptance Date

December 6, 2021

Published in Issue

Year 1970 Volume: 5 Number: 2

APA
Sarri, J., Abdulmutalıb, Y., Mohammad Tılka, M., Terzi, E., & Tahıluddın, A. (2022). Effects of inorganic nutrient enrichment on the carrageenan yield, growth, and ice-ice disease occurrence of red alga Kappaphycus striatus. Aquatic Research, 5(2), 99-109. https://doi.org/10.3153/AR22009

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