Directional selection against different life histories in the Arctic lamprey (<i>Lethenteron camtschaticum</i>): identification by microsatellite analysis
Bibliographic record
Abstract
To understand the selective forces promoting life history evolution in lampreys, footprints of natural selection were identified using the hitchhiking mapping approach for microsatellite loci. To achieve the objective, the Arctic lamprey (Lethenteron camtschaticum), including anadromous and recently derived landlocked-fluvial populations, were targeted. Seven microsatellites were genotyped and subjected to population genetic analyses and outlier tests. The results indicated that a significant signature of directional selection could be detected in one microsatellite locus (Lspn013). Discrepancies in allelic frequencies of Lspn013 were remarkable between anadromous and landlocked-fluvial populations, leading to high population genetic divergence between them. Based on a homology search, Lspn013 was estimated to be located near the vasotocin precursor gene, which plays an important role in osmoregulation. Life history differences in lampreys have resulted from habitat difference in adult phase, which have probably led to recent natural selection on the gene responsible for osmoregulatory functions.
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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) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
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".