Estimating Genetic Diversity of the Invasive Tunicate Didemnum vexillum in Global Populations
Bibliographic record
Abstract
Populations in Point Reyes National Seashore The presence of the invasive tunicate Didemnum vexillum in the San Francisco Bay was first documented in 1993, and it has since been found in Point Reyes National Seashore. In 2012, 38 samples of D. vexillum were collected from two locations in Point Reyes: Tomales Bay and Drake’s Estero. This summer, DNA from the 38 samples was extracted and analyzed using microsatellite and mitochondrial markers. The goal of this analysis was to determine the level of genetic connectivity between these two populations and their relationship to other global populations in order to answer important ecological questions regarding their spatial patterns and rates of migration. The results of our analysis are preliminary; our goal is to obtain more samples of D. vexillum from the SF Bay area, and analyze additional loci.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.002 | 0.001 |
| 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".