A study on allelopathy effects of dinoflagellate margalefidinum (cochlodinium) polykrikoides on pyrodinium bahamense

Mohammad Noor, Normawaty and Al-Has, Asilah and Muhammad Shaleh, Siti Raehanah and Deny Susanti, Darnis (2024) A study on allelopathy effects of dinoflagellate margalefidinum (cochlodinium) polykrikoides on pyrodinium bahamense. Revelation and Science, 14 (1). pp. 28-38. ISSN 2229-9645 E-ISSN 2229-9947

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Abstract

The dinoflagellate Margalefidinium polykrikoides, a fish killer, is found all over the world and is associated with harmful algal blooms (HABs). In this study, we investigated the allelopathy effects of M. polykrikoides on the growth of toxic dinoflagellate Pyrodinium bahamense. Allelopathy effects of M. polykrikoides were studied using different volumes (10 mL, 20 mL, and 50 mL) of filtrate filtered from M. polykrikoides’s bloom collected from the field and cultured medium. The results showed that P. bahamense was inhibited significantly (p<0.05) in 50 mL cell-free culture filtrate of M. polykrikoides bloom with an inhibition rate of >80%, but not in M. polykrikoides cell-free culture filtrate. In a bi￾algal, non-contact culture experiment of M. polykrikoides and P. bahamense at three different ratios was also conducted, separated by a 5µm membrane. The observation showed that at a ratio of 1:5 (100 cells mL-1 of M. polykrikoides: 500 cells mL-1 P. bahamense), P. bahamense cell number increased significantly (p<0.05) after Day 4. This study provides useful information on competing with P. bahamense and forming bloom to dominate the area occupied by M. polykrikoides

Item Type:	Article (Journal)
Uncontrolled Keywords:	Allelopathy, Margalefidinium polykrikoides, Pyrodinium bahamense, Bloom
Subjects:	Q Science > Q Science (General)
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science > Institute of Oceanography and Maritime Studies Kulliyyah of Science Kulliyyah of Science > Department of Chemistry
Depositing User:	Dr Normawaty Mohammad Noor
Date Deposited:	27 Dec 2024 09:59
Last Modified:	27 Dec 2024 09:59
URI:	http://irep.iium.edu.my/id/eprint/117267

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