Parasites of Illegally Introduced Tench (Tinca tinca) in the Richelieu River, Quebec, Canada
Bibliographic record
Abstract
The tench (Tinca tinca) was introduced illegally into Quebec, Canada, in aquaculture operations in 1986. The fish escaped into the Richelieu River in the early 1990s and has since established a reproducing population. Nine of 10 fish sampled in 2000 were infected with parasites, including Raphidascaris acus (80%), Ergasilus megaceros (60%), larval Valipora campylancristrota (20%) and larval Proteocephalidae (20%). The tench were infected with fewer parasite species than those in its native range, in accordance with the enemy escape hypothesis. The copepod E. megaceros is a new Canadian record, with tench being a new host record. Intensity of E. megaceros was positively related to fish weight. It is suggested that V. campylancristrota, a potentially pathogenic metacestode, may be an introduced species that arrived with the tench, although other possible sources of introduction are discussed. The concomittant introduction of the fish and the parasite V. campylancristota may pose a threat to the copper redhorse (Moxostoma hubbsi), an endangered species found almost exclusively in the Richelieu River.
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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 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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 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".