The International Sampling Program: continent of origin and biological characteristics of Atlantic salmon (Salmo salar) collected at West Greenland in 2020 and 2021
Bibliographic record
Abstract
An Atlantic salmon (Salmo salar) mixed-stock fishery generally operating from August through October exists off the coast of Greenland and primarily harvests 1 sea-winter (1SW) North American and European origin salmon destined to return to natal waters as 2 sea-winter (2SW) spawning adults. To collect data on the biological characteristics and origin of the harvest necessary for international stock assessment efforts, parties to the North Atlantic Salmon Conservation Organization’s (NASCO) West Greenland Commission (WGC) agreed to participate in an international sampling program for the 2020 and 2021 fisheries. Due to the ongoing restrictions and uncertainty related to the COVID-19 pandemic, the 2020 traditional samplingprogram involving international collaborators traveling to Greenland and sampling the harvest was canceled. As an alternative, a contingency plan was developed which involved providing sampling kits to Greenland’s Fisheries License Control Authority (GFLK) Wildlife Officers, staff at the Greenland Institute of Nature Resources (GINR), and individual fishers throughout Greenland in an attempt to develop a Citizen Science sampling effort. In 2021, the traditional sampling program was again implemented, and international collaborators traveled to Greenland and sampled theharvest. Sampling kits were also provided to staff at the GINR, and the Citizen Science was modified and pursued. Reported landings were 31.7 metric tons (t) in 2020 and 41.0 t in 2021. In 2020, only 197 samples were collected whereas 1,548 were collected in 2021. The collected samples represented approximately 1% and 17% of the reported landings in 2020 and 2021, respectively. Delays in collating the 2020 samples resulted in the samples not being shipped to the North American collaborators in time for sample processing and summation prior to the 2021 International Council for the Exploration of the Sea (ICES) Working Group on North Atlantic Salmon (WGNAS) meeting. Delays also occurred in 2021, resulting in only a portion of the samples being available for processing prior to the 2022 WGNAS meeting. All samples have since been processed. In 2020, the mean length of sampled fish was 67.1 cm, and the mean whole weight was 3.50 kg. North American origin fish were primarily freshwater age 2 through 4 years (28.2, 23.1, and 28.2%, respectively), European origin fish were primarily freshwater age 2 (74.2%), and overall, 94.5% of the sampled fish were 1SW salmon. North American 1SW salmon averaged 66.6 cm with a mean whole weight of 3.20, and the 1SW mean length of European 1SW salmon was 65.6 cm with a mean whole weight of 3.38 kg. In 2021, the mean length of sampled fish was 66.6 cm, and the mean whole weight was 3.42 kg. North American origin fish were also primarily freshwater age 2 through 4 years (27.3, 38.3, and 21.7%, respectively), European origin fish wereprimarily freshwater age 2 (58.2%), and overall, 95.9% of the sampled fish were 1SW salmon. North American 1SW salmon averaged 66.2 cm with a mean whole weight of 3.34 kg, and the mean length of European 1SW salmon was 65.9 cm with a mean whole weight of 3.34 kg. Approximately 5,200 North American (17.2 t) and 3,600 European (13.7 t) salmon were harvested in 2020, and approximately 10,300 North American (34.4 t) and 2,000 European (7.4 t) salmon were harvested in 2021, not taking into account any unreported catch or reported harvest at East Greenland. Primary contributors to the sampled fish were the Gaspe Peninsula, the Gulf of St. Lawrence, and the Labrador South reporting groups (41 and 51% of the overall contribution in 2020 and 2021, respectively) for North American salmon and the United Kingdom/Ireland reporting group (42% and 16% of the overall contribution in 2020 and 2021, respectively) for European origin salmon. Travel restrictions associated with the COVID-19 pandemic significantlychallenged the 2020 sampling program, and the sampling may not be wholly representative of the harvest across time and space. However, the samples do provide insights into the biological characteristics and origin of the harvested fish from this year. In 2021, the sampling program was2successful, and the resulting data are considered representative of the entire harvest given the spatial and temporal coverage of the sampling.
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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 | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.003 | 0.002 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 0.001 |
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".