Structuring mechanisms of yellow perch (<i>Perca flavescens</i>) parasite communities: host age, diet, and local factors
Bibliographic record
Abstract
Seventeen parasite species were recovered from perch in four small Canadian Shield lakes with different fish species compositions. Parasite species such as Urocleidus adspectus Müller, 1936, Bunodera sacculata Van Cleave and Müller, 1932, and Proteocephalus pearsei La Rue, 1919 are phylogenetically associated with perch and (or) percids; others, such as Crepidostomum cooperi Hopkins, 1931, Spinitectus gracilis Ward and Magath, 1917, and Echinorhyn chus salmonis Müller, 1784, are related to dietary sharing; and larval species such as Apophallus brevis Ransom, 1920 and Raphidascaris acus (Bloch, 1779) are phylogenetically tied to perch but also to bird and fish definitive hosts. Variable patterns of dominance were dependent on trophic level and other host species in the system. As matrix fill increased with host age, the dependence of the parasite component communities on the given infracommunities decreased, confirming that predictable component communities depend on repetitive infracommunities. Shifts in dietary preference with age and (or) size and dietary sharing among host species were important in producing repetitive infracommunities. Host diet and age contributed significantly to the rate of parasite species accumulation. Parasite composition at the infracommunity scale changes with local community structure across the watershed and regardless of lake connectivity. The presence of ecologically derived parasite species is strongly influenced by local factors.
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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 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.001 |
| 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".