Seasonal and Geographical Distribution of PAHs in Mussels,<i>Mytilus Edulis</i>, Collected from an Urban Harbour
Bibliographic record
Abstract
Mytilus edulis were collected intertidally from 16–18 sites located around the perimeter of Halifax Harbour, of an island located at the entrance to the harbour and from the Northwest Arm. The concentrations of 31 polycyclic aromatic hydrocarbons (PAHs), lipid and moisture content were determined in pools of this filter feeder sampled over three seasons spanning two years, along with calculating individual condition indices. Contaminants were nearly undetectable in many of the summer mussels and highest in some of the spring samples. At several sites, the sum of PAHs expressed on a dry or lipid weight basis, was either equal or higher in April compared to November. Fluoranthene was the most predominant PAH followed by pyrene and phenanthrene. At most sites, parental PAHs, associated with combustion sources of contamination, were more abundant than alkylated derivatives. A larger petroleum input was noticeable in mussel extracts from sites in close proximity to potential sources.
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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 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 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) | 0.001 | 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".