Distribution, Source Appropriation, and Human Health Risk Assessment of Polycyclic Aromatic Hydrocarbons due to Consumption of Callinectes amnicola from Woji Creek inSambreiro River
Why this work is in the frame
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Bibliographic record
Abstract
Crabs (Callinectes amnicola) and surface water sampled from the Sambreiro River, Rivers State of Nigeria, were analyzed for polycyclic aromatic hydrocarbons concentrations for four months (December (2019), January, February, and March (2020)). Excess cancer risk due to ingestion of the crabs was assessed for individuals of the age groups: 3 to < 6 years, 16 to < 21 years, 21 to < 50 years, and ≥ 50 years. Although concentrations in surface water (ΣPAH16 = 0.125±011 mg/L) were lower than in the previous study, results obtained revealed considerably higher concentrations of aromatic hydrocarbons in crab tissues (ΣPAH16=10.659±2.399 mg/kg). Hepatopancreas (ΣPAH16=6.590±0.266 mg/kg) accumulated the highest concentration of hydrocarbons followed by the gills (ΣPAH16=2.349±0.029 mg/kg), then the muscles (ΣPAH16=1.720±0.320 mg/kg). Source appropriation results revealed a combination of the petrogenic and pyrogenic contribution of hydrocarbons in the crab tissues. The trend for the toxicity equivalent quotient was hepatopancreas > muscles > gills; while the excess cancer risk exceeded for all age groups, suggesting that humans are at risk of cancer arising from the ingestion of crab species from this study location.
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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 | 0.001 |
| 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 | 0.000 | 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 it