Research on Phylogenesis and Species Definition of <i>Oxyeleotris marmoratus</i> Based on Mitochondrial Genome
Bibliographic record
Abstract
Marble goby ( Oxyeleotris marmorata ) is a freshwater fish with high economic value in aquaculture and widespread distribution in Southeast Asia. In this study, phylogenetic analysis of marble goby and related groups was performed using mitochondrial genome data from previous studies, and molecular population genetics was used to explore their species boundaries. Many results showed that the mitochondrial genome of marble goby is about 16.5 kb in length, encoding 13 protein genes, 22 tRNA genes and 2 rRNA genes, and the gene structure is consistent with that of typical bony fish. The phylogenetic tree shows that marble goby belongs to the family Channidae of the suborder Goby in fish classification, and is clearly differentiated from closely related groups such as the family Oxyeleotris (mudskippers, etc.) and the family Goby. The mitochondrial genetic differences between different geographical populations within the species are low (for example, the COI genetic distance between the artificially cultured population and the wild population is only 0.66%), but obvious genetic differentiation is still observed between the large river basins, suggesting the possible existence of cryptic lineages. Closely related species that are difficult to distinguish by morphological identification can be identified by molecular data. Species delimitation analysis based on mitochondrial sequences supports that the marble goby is a single species, but it is recommended to combine nuclear genome data for comprehensive taxonomic verification. This study emphasizes the importance of combining morphological characteristics with molecular evidence for species delimitation, and puts forward conservation and management recommendations for the phylogeographic pattern of marble goby in the Mekong region. The research results provide a scientific basis for fish taxonomy, species conservation and aquaculture breeding.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.003 | 0.002 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.002 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".