U.S. Fish and Wildlife Service Office of Subsistence Management Fisheries Resource Monitoring Program Effects of Ichthyophonus on Survival and Reproductive Success of Yukon River Chinook Salmon
Bibliographic record
Abstract
Studies confirmed that approximately 25-30% of Yukon River chinook salmon enter the river infected with Ichthyophonus. Infection prevalence remained constant until fish reached the upper Yukon at Dawson and Whitehorse where it dramatically dropped to 10% or less. Clinical signs of disease were minimal when fish entered the river, but increased to nearly 30% when fish reached Rampart Rapids at river-mile 745. There was no difference in prevalence of infection in fish from the early part of the run compared to fish from the end of the run; however, in fish from the end of the run, the parasite was disseminated and clinical disease was apparent. Infection and disease prevalence rates in fish from the Tanana River and the mouth of the Chena River were similar to those in the Yukon River. However, female spawn-outs collected from the upper Chena River showed no evidence of Ichthyophonus infection. This dramatic decrease in infection prevalence in females is similar to that seen at Whitehorse in 2000 and 2001. Males showed a slight decrease in infection prevalence at Whitehorse and the Chena River. Elevated river temperatures within and among years may be an important cause of increased disease among Yukon River chinook salmon.
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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 | 0.000 | 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 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".