Fish community changes in an exploited marine ecosystem : Newfoundland Southern Grand Bank and St. Pierre Bank, 1951-1995
Bibliographic record
Abstract
Longterm fish community changes on southern Grand and St. Pierre Banks were examined from dedicated research survey trawls conducted by the Canadian Department of Fisheries and Oceans from 1951-1995. These time series pre-date the arrival of factory-freezer-trawlers in the 1960's and 1970's. and thus provide insight into changes in the biomass and diversity of an exploited system. The time series were standardized by applying conversion factors for changes in vessel, diel changes in catchability, and relative catchability of selected species. Total biomass in the 1990's was reduced to 11% and 9% of that observed in the 1950's on southern Grand Bank and St. Pierre Bank, respectively, and largely resulted from the decline of the haddock population. Compensatory responses to this decline were visible with the flatfish on southern Grand Bank and skate on St. Pierre Bank but continued fisheries for flatfish and bycatch of skate ensured that total species biomass would remain at low levels. This study shows the importance of examining data on as long a time-scale as possible. Failure to examine such historical data has resulted in the largest skate in the northwest Atlantic, the barndoor skate, being driven to near extinction without anyone noticing.
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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 | 0.002 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.003 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.002 | 0.002 |
| Research integrity | 0.001 | 0.003 |
| Insufficient payload (model declined to judge) | 0.004 | 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".