Teng, Sing Tung and Law, Ing Kuo and Hanifah, Afiqah Hamilton and Bin Bojo, Othman and Idrus, Farah Akmal and Mannaf, Aini Hannani Naqiah Abdul and Lim, Po Teen and Leaw, Chui Pin (2021) Bloom of a freshwater green alga Botryococcus braunii (Botryococcaceae, Trebouxiophyceae) and the associated mass fish mortality in a man-made lake, Sarawak, Malaysia. Plankton & Benthos Research, 16 (1). pp. 59-68. ISSN 1880-8247, DOI https://doi.org/10.3800/pbr.16.59.
Full text not available from this repository.Abstract
Mass mortality of fish (similar to 8,500 fishes), mainly Oreochromis placidus, was noted in a man-made lake located at Kuching, Sarawak (Malaysia). A field investigation was conducted to collect water samples and fishes. Patches of discoloration in brick red were observed in the lake and clear oil layer was found on the surface of the water. Microscopic observation and enumeration of the water samples showed that the plankton composition was dominated by a green algal species Botryococcus sp., with the colony densities ranging 1.2x10(3)-7.4x10(6) colonies L-1. Detailed morphological assessment by light microscopy revealed the dominant species as Botryococcus braunii Kiltzing. Molecular characterization using an rDNA marker further supported the species identity as B. braunii in the L race. Fish gill observation showed that cells of B. braunii and the oily substances were found in the dead fish gills. The race-L B. braunii bloom was reported, for the first time, to be associated with a fish kill event in a freshwater lake in Malaysia and confirmed the species as one of the algal types causing harmful effects to the environment.
| Item Type: | Article |
|---|---|
| Funders: | Universiti Malaysia Sarawak Small Grant Scheme [F07/SGS/1522/2016], Shell Chair grant [101/SHC/1627/2017] |
| Uncontrolled Keywords: | Black tilapia; Botryococcus braunii; Fish kill; Harmful algal bloom; Hydrocarbon |
| Subjects: | G Geography. Anthropology. Recreation > GC Oceanography Q Science > QH Natural history |
| Divisions: | Deputy Vice Chancellor (Research & Innovation) Office > Institute of Ocean and Earth Sciences |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 08 Jul 2022 04:47 |
| Last Modified: | 08 Jul 2022 04:47 |
| URI: | http://eprints.um.edu.my/id/eprint/33954 |
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