Fouling Community of the Snow Crab Chionoecetes Opilio in Atlantic Canada
Bibliographic record
Abstract
We examined the fouling organisms on the exoskeleton of 762 adult male snow crabs (Chionoecetes opilio) from 10 sampling stations situated in the southern Gulf of St. Lawrence (SGSL) and the Scotian Shelf (SS) off the eastern coast of Canada. A total of twenty-one sessile invertebrate families were observed on the exoskeleton of crabs. Epibiotic families occurring on |$10\% $| or less of crabs were considered minor foulers, while families occurring in |$50\% $| or more were considered major foulers. Nine minor and 3 major families were observed in the SGSL. The most important taxa were the bryozoans Alcyonidium spp. |$(87.5\% )$| and Hippothoa spp. |$(77.5\% )$|, as well as the polychaetes Spirorbis spp. |$(68.8\% )$|. Eight minor and 3 major families were observed in the SS. The principal taxa belonged to the cirripeds Balanus spp. |$(89.1\% )$|, the bryozoans Alcyonidium spp. |$(78.2\% )$| and the polychaetes Spirorbis spp. |$(77.2\% )$|. The relative abundance of each of the taxa observed on crabs suggests that differences in the structure of the community exist between the two studied regions and within a given region. These differences were confirmed by multivariate analyses (e.g., MDS plot, ANOSIM and SIMPER analyses). Variations between the fouling communities are mainly driven by the presence/absence of bryozoans and barnacles. Our results also tend to show that the Cape Breton region may act as a transition zone between the SGSL and the SS. Results are discussed in a general ecological context. Potential stock management implications are also underlined.
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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 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 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".