The status of the Dwarf Wedgemussel, Alasmidonta heterodon, in Canada
Bibliographic record
Abstract
The watershed of the Petitcodiac River, New Brunswick, is the only recorded location of the Dwarf Wedgemussel, Alasmidonta heterodon (Lea 1830), in Canada.The species was last collected in the Petitcodiac watershed in 1960, at which time it was considered to be common in the freshwater reaches of the Petitcodiac River and one of its major tributaries, the North River.Surveys in 1984, 1997 and 1998 failed to detect any specimens and the Dwarf Wedgemussel was classified as Extirpated by the Committee on Status of Endangered Wildlife in Canada (COSEWIC) in April 1999.The disappearance of the species from Canadian waters was probably caused by the construction of a causeway across the tidal portion of the Petitcodiac River in 1967-1968 and resultant exclusion of a diadromous fish species required for completion of the glochidial stage of the Dwarf Wedgemussel's lifecycle.Local extirpations of the Dwarf Wedgemussel from much of its American range have also been linked to dam construction, which blocked migration of anadromous fishes.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 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 teacher head, 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".