Abstract
Myxosporean infection in marine water fishes has drawn less attention than in freshwater fishes, which resulted in a higher taxonomic variety in freshwater in Malaysia. This study aimed to address the gap by conducting a myxosporean survey on two commercially significant marine fish species, Nemipterus furcosus (Valenciennes) (Eupercaria incertae sedis: Nemipteridae) and Selar crumenophthalmus (Bloch) (Carangiformes: Carangidae), collected from the northeastern part of peninsular Malaysia. During the examination of the organs, two distinct Myxobolus Bütschli, 1882 species were discovered in the brain tissue of these fishes, despite the absence of any observable pathological signs. The two Myxobolus species were characterized through morphometry, morphology, and analysis of partial small subunit ribosomal RNA (18S rDNA) gene. As a result, Myxobolus acanthogobii Hoshina, 1952, which infects 2.3% of N. furcosus, is synonymous with a myxobolid species commonly found in Japanese waters, based on its morphological traits, tissue tropism, and molecular diagnostics. Furthermore, a novel species, Myxobolus selari n. sp., was described, infecting the brain of one (11%) individual S. crumenophthalmus. This unique species displayed distinctive features, placing it within a well-supported subclade primarily comprising brain-infecting myxobolids. Maximum likelihood analysis further revealed the close relationships among these brain-infecting myxobolids, underscoring the significance of tissue tropism and host taxonomy for myxobolids. This study represents the initial documentation of Myxobolus species within the southern South China Sea, shedding light on the potential diversity of marine myxosporean in this region. This article was registered in the Official Register of Zoological Nomenclature (ZooBank) as urn:lsid:zoobank.org:pub:7C400E35-7CB8-4DEE-92B7-F75FF3926441.
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Acknowledgement
This research was conducted under research grant RAGS/1/2015/WAB13/UMT/03/1 granted to MHB. The authors would like to thank the Department of Fisheries (DOF) Malaysia, the Southeast Asia Fisheries Development Centre (SEAFDEC), and the staff of Universiti Malaysia Terengganu for their contributions to this research. Some of the fish samples were retrieved from the East Coast Peninsular Malaysia Exclusive Economic Zone (ECPM EEZ) Demersal Survey 2016.
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This research was funded by a Research Development Grant Scheme (RAGS) from the Ministry of Science, Technology, and Innovation (MOSTI) in Malaysia under grant number RAGS/1/2015/WAB13/UMT/03/1.
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All authors participated actively in the research process and unanimously endorsed the final version for submission. Muhammad Arif Samshuri played a fundamental role in the conceptualization, investigation, data curation, and the creation of the initial draft, along with insightful visualization. Muhammad Hafiz Borkhanuddin provided substantial contributions in terms of conceptualization, project administration, supervision, methodology, formal analysis, comprehensive review and editing of the manuscript, as well as securing funding for the study.
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Samshuri, M.Á., Borkhanuddin, M.H. Myxobolus acanthogobii Hoshina, 1952 and Myxobolus selari n. sp. (Myxosporea: Myxobolidae) infecting brain of commercial fishes in Terengganu, Malaysia. Syst Parasitol 101, 39 (2024). https://doi.org/10.1007/s11230-024-10162-3
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DOI: https://doi.org/10.1007/s11230-024-10162-3