A5020162063- Marine Toxins and Detection Methods
- Marine and coastal ecosystems
- Microbial Community Ecology and Physiology
- Protist diversity and phylogeny
- Identification and Quantification in Food
- Genomics and Phylogenetic Studies
- Marine Biology and Ecology Research
- Diatoms and Algae Research
- Coral and Marine Ecosystems Studies
- Vibrio bacteria research studies
- Analytical chemistry methods development
- Crustacean biology and ecology
- Marine Biology and Environmental Chemistry
- Aquatic Ecosystems and Phytoplankton Dynamics
- Plant Pathogens and Fungal Diseases
- Environmental DNA in Biodiversity Studies
- Mycotoxins in Agriculture and Food
- Water Quality Monitoring and Analysis
- Aquaculture disease management and microbiota
- Fish Biology and Ecology Studies
- Marine Bivalve and Aquaculture Studies
- Biochemical and biochemical processes
- Marine and coastal plant biology
- Aquaculture Nutrition and Growth
- Isotope Analysis in Ecology
Universiti Malaysia Sarawak
2015-2024
Field sampling was undertaken to investigate the occurrence of Pseudo-nitzschia Peragallo species in eight locations along coast Malaysian Borneo. A total 108 strains were isolated, and their morphology examined with SEM TEM. Additionally, molecular data from nuclear-encoded partial LSU rDNA, ITS regions, characterized. five confidently identified based on a combination distinct morphological characteristics supporting evidence: P. brasiliana Lundholm, Hasle & Fryxell, cuspidata (Hasle)...
A study on the morphology and phylogeny of 18 strains Pseudo-nitzschia established from Strait Malacca, Peninsular Malaysia, was undertaken. Morphological data combined with molecular evidence show that they constitute three new species, for which names, P. batesiana sp. nov., lundholmiae fukuyoi are proposed. The species closely resemble in pseudodelicatissima complex sensu lato. Morphologically, differs other by having a smaller part cell overlapping chain, whereas fewer poroid sectors...
Forty-eight isolates of Pseudo-nitzschia species were established from the Miri coast Sarawak (Malaysian Borneo) and underwent TEM observation molecular characterization. Ten found: P. abrensis, batesiana, fukuyoi, kodamae, lundholmiae, multistriata, pungens, subfraudulenta, as well two additional new morphotypes, herein designated bipertita sp. nov. limii This is first report lundholmiae in coastal waters Malaysian Borneo. differs its congeners by number sectors that divide poroids,...
Analyses of the mitochondrial cox1 , nuclear‐encoded large subunit ( LSU ), and internal transcribed spacer 2 ITS 2) RNA coding region Pseudo‐nitzschia revealed that P. pseudodelicatissima complex can be phylogenetically grouped into three distinct clades (Groups I–III), while delicatissima forms another clade (Group IV) in both phylogenetic trees. It was elucidated comprehensive taxon sampling (sampling sequences), selection appropriate target genes outgroup, alignment strategies influenced...
Spiny lobsters of the family Palinuridae Latreille, 1802 are known to be industrial crustaceans in global fishing market amongst other crustacean marine species.
A new species of Pseudo-nitzschia (Bacillariophyceae) is described from plankton samples collected Port Dickson (Malacca Strait, Malaysia) and Manzanillo Bay (Colima, Mexico). The possesses a distinctive falcate cell valve, which they form sickle-like colonies in both environmental cultured strains. Detailed observation frustules under TEM revealed ultrastructure that closely resembles P. decipiens, yet the differs by valve shape greater ranges striae poroid densities. readily distinguished...
Abstract Species of the diatom Pseudo-nitzschia are known to produce domoic acid that is responsible for amnesic shellfish poisoning (ASP). To investigate potential risk ASP and species occurrence toxic or potentially in Malaysian waters, plankton samples were collected from 17 locations. Samples examined through transmission electron microscopy. identified on basis frustule morphology morphometric measurements. Twenty-two well-described recorded, which 14 new records Malaysia. A morphotype,...
Red tides and associated fisheries damage caused by the harmful raphidophyte Chattonella were reassessed based on documented local records for 50 years to understand distribution economic impacts of species in Western Pacific. Blooms with have been recorded East Asia since 1969, whereas they only Southeast 1980s. Occurrences from six Asian countries, Indonesia, Malaysia, Philippines, Singapore, Thailand Viet Nam, mass mortalities mainly farmed shrimp 1980–1990s, fish 2000–2010s. These...
Seahorse are teleosts belonging to the genus Hippocampus which consists of 57 species. Among species, only 12 species exist in Malaysian waters and 11 coastal Sabah. These records checklists pre-date 2015, no known studies or field surveys have been conducted Sabah since then. In this study, a survey was selected areas document composition through morphological genetic identification. Out that were recorded previously, two (Hippocampus barbouri comes) found identified using taxonomic keys....
To explore the species diversity and toxin profile of Pseudo-nitzschia, monoclonal strains were established from Chinese southeast coastal waters. The morphology was examined under light transmission electron microscopy. internal transcribed spacer region ribosomal DNA sequenced for phylogenetic analyses, secondary structure ITS2 predicted compared among allied taxa. A combination morphological molecular data showed presence two new species, Pseudo-nitzschia hainanensis sp. nov. taiwanensis...
Abstract Pseudo‐nitzschia is a group of widely distributed planktonic diatoms. Some species produce the neurotoxin domoic acid. Herein, two new were described from Chinese coastal waters and South China Sea after combining morphological molecular data, together with biogeographical traits. punctionis sp. nov. was similar to bipertita morphologically, but differed in poroid structure, which undivided P. divided sectors . This difference corresponded presence hemicompensatory base changes...