Competition between invasive green crab <i>(Carcinus maenas)</i> and American lobster <i>(Homarus americanus)</i>
Bibliographic record
Abstract
Abstract Green crab (Carcinus maenas) have recently invaded the southern Gulf of St. Lawrence, Canada. Although these invasive crabs have coexisted without appreciable impact on American lobster (Homarus americanus) populations in northeastern United States, Bay of Fundy, and the southern shore of Nova Scotia, Canada, the green crab in the southern Gulf of St. Lawrence likely represents a new introduction of crab from northern Europe. The southern gulf is ideal habitat for green crab, and the crab are commonly captured subtidally, increasing the potential for overlap with juvenile lobsters. To complement previous experiments with green crab versus small (28–57 mm carapace length, CL) and medium (55–70 mm CL) sized lobsters in food competition trials, this paper reports findings from trials with large (72–80 mm CL) lobsters. The lobsters were first to gain possession of the food in an equal number of trials as green crab. The large lobsters fed for 62% of the total feeding time, versus 38% for the green crab, and initiated a significantly greater number of aggressive interactions than green crab. It appears that a reversal of dominance with adult green crab occurs once lobsters exceed 72 mm CL.
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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 | 0.001 | 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 | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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".