article · Journal of Fisheries and Aquatic Science
Molecular barcoding was conducted on 22 fish species from the family Sparidae collected from Abo Qir Bay in the Mediterranean Sea and the Gulf of Suez in the Red Sea. The partial coding region of the mitochondrial cytochrome oxidase subunit I gene was amplified and sequenced, and the resulting sequences were deposited in the GenBank database. Phylogenetic analysis demonstrated that the sampled Sparidae species represent a monophyletic group. The resulting evolutionary tree divided into two major clades alongside several sub-clades. Nearly all examined species grouped within these two primary clades, with Crenidens crenidens forming a distinct, separate branch. These findings confirm the evolutionary relationships among Sparidae species in Egyptian waters and provide genetic support for earlier evidence indicating two primary lineages within the family.
Clarifying the evolutionary relationships within diverse marine families aids fundamental biodiversity cataloguing and species identification. By establishing verified mitochondrial DNA barcodes for regional sea breams, the work provides reference data that can assist marine biologists in distinguishing species accurately across the Mediterranean and Red Sea environments.
The abstract does not indicate an application pathway or commercialisation route for these findings, because the research is early-stage fundamental scientific work strictly focused on generating mitochondrial DNA reference barcodes and resolving the evolutionary relationships among regional marine fish species.
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Background: The family Sparidae includes about 115 species divided into 33 genera that inhabits tropical and temperate coastal waters of the Pacific, Indian and Atlantic oceans. Herein, fish of family Sparidae were molecularly barcoded using the mitochondrial gene, cytochrome oxidase subunit I (COI). Materials and Methods: Fish samples from 22 fish species of the family Sparidae were collected from Abo Qir Bay, West of the Mediterranean sea and the Gulf of Suez, North of the Red Sea. Genomic DNA was extracted from fish muscles of these species and partial coding region of the COI gene was amplified then sequenced and their sequences were deposited into the GenBank database. Results: The results of the phylogenetic tree showed that monophyly of Sparidae species. The tree was divided into two distinct clades and some sub-clades. The two major clades are including all the species under the study except Crenidens crenidens in a separate branch. Conclusion: Our results confirm the phylogenetic relationship of these Sparidae species in Egyptian Mediterranean and Red Sea and support the previous finding which concluded that the Sparidae is composed by two major lineages.
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DOI: 10.3923/jfas.2017.73.81
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