Population Survey Data for Coastal Giant Salamanders in the Chilliwack River Valley
Bibliographic record
Abstract
The Coastal Giant Salamander (Dicamptodon tenebrosus, formerly known as Pacific giant salamander) is considered a species at risk (Assessed as Threatened by COSEWIC and red-listed by BC-CDC), and the primary putative threat in BC is forestry. Forestry operations impact both the aquatic and terrestrial habitats of the salamanders. Lack of forest cover exposes the adults to wider temperature extremes and the possibility of desiccation. Development of land for farming and settlement along Vedder Mountain and the Cultus Lake area has encroached on the B.C. distribution range of Dicamptodon tenebrosus. Adults depend on riparian forests, which are often removed by logging. In the streams, larvae (and neotenic adults) must cope with more variable stream flows, erosion and sedimentation of stream habitats, and increased water temperatures. This long-term (1994-2001) mark-recapture study of Coastal Giant Salamanders led by Dr. John Richardson (UBC) and Dr. William Neill (UBC) took place in 12 small streams in the Chilliwack River Valley, BC. This study includes survey data to assess whether forest harvest history near the streams or other geomorphic characteristics impacted density, survival, and growth rates. These data, the only long-term data using mark-recapture designs (CJS, using Lebreton design) for this species anywhere, will play a crucial role in future recovery efforts for this threatened species in Canada. The scientific value is high in understanding population dynamics and in the face of continued land use impacts and climate change, offering hope for the future of these salamanders.
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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 | 0.000 | 0.000 |
| Open science | 0.000 | 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".