Changes in adult Atlantic salmon (Salmo salar) run timing in the Miramichi River, New Brunswick, in relation to river temperature and discharge rates over seven decades
Bibliographic record
Abstract
Atlantic salmon (Salmo salar) is a culturally, economically, and ecologically important species in Eastern Canada. Populations have been declining in recent decades, which can have negative implications for livelihood, ecosystems, and local tradition. Ecological factors associated with climate change in aquatic systems including temperature and river flow can alter the upstream migration behaviour of adult salmon. River entry during upstream migration for spawning, or “run timing”, is a critical life history event for this species. This project found that run timing has significantly changed in the Miramichi River between 1952-2021. To investigate whether this change is associated with ecological factors in freshwater, I examined the relationship between freshwater environmental predictor variables – temperature and discharge rate – and Atlantic salmon entry to the estuary. Unlike previous work on smaller freshwater tributaries, there were no strong relationships found between entry to the estuary from the ocean and freshwater variables.
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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 | 0.001 | 0.002 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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".