Population Genetic Structure of <I>Pissodes strobi</I> (Coleoptera: Curculionidae) in British Columbia, Canada
Bibliographic record
Abstract
Abstract The genetic structure of 41 Canadian populations (27 populations from British Columbia, two of which were from east of the Continental Divide, and the remaining 14 representing localities east of the Continental Divide) of the white pine weevil, Pissodes strobi (Peck), was investigated using isozyme markers. Differentiation among populations (FST) was estimated to be 0.084 and inbreeding within populations was low with estimated mean FIS of 0.011. Although overall genetic uniformity among the studied 41 populations was high (mean Nei’s genetic distance = 0.027), differences among groups of populations were revealed in cluster analyses. The 16 weevil populations obtained from areas east of the Continental Divide formed a significant cluster with the 11 populations collected from the Interior British Columbia. The 11 weevil populations examined from the South Coast–Vancouver Island of British Columbia were distinct from this cluster, as were the three weevil populations collected from the North–Central Coast of British Columbia. Populations within the South Coast–Vancouver Island group were the most genetically dissimiliar to each other, with Nei’s genetic distance ranging from 0.004 to 0.108. This was caused, in part, by differences in allele frequencies in the Bella Coola, Eve River, and Nanaimo populations relative to the other eight populations within this group. Genetic diversity estimates, in terms of the mean number of alleles per locus, the percentage of polymorphic loci and the mean expected and observed heterozygosity, were higher in eastern than western populations.
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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 | 0.004 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".