Striped Bass Morone saxatilis (Walbaum, 1792) population demographics and mixing in the Bay of Fundy
Bibliographic record
Abstract
The use of population dynamics in fisheries management is a crucial tool to understand trends and appoint sustainable harvest rates. In the Bay of Fundy (BoF), Striped Bass Morone saxatilis is a highly prized recreational fishery and aboriginal FSC fish. Striped Bass are found throughout Minas Basin, where they are believed to mix with U.S.A. Striped Bass populations. Mixing of these populations creates difficulties in determining population structure which is required for implementation of effective conservation actions for Canadian stocks. Here we use catch data from 1981–2019, as well as mark-recapture to answer information gaps on population structure. Specifically, we address information gaps on movement, length frequency, weight-length relationships, and estimating growth using tag data. Our data suggests that 99.5% of bass tagged over 7 years did not leave the Minas Basin. Growth models were comparable to traditional length-at-age models with Francis and Wang models outperforming Fabens models. 183 tissue samples were analyzed using next generation sequencing (NGS), single nucleotide polymorphisms (SNP)s and microsatellites and summary of mark-recapture studies since the 1930s to determine the presence and abundance of other populations in the Minas Basin, and genetic origin of bass in Labrador and Annapolis River. Of the bass chosen for higher probability of migrancyanalyzed using SNPs ,99% were of Shubenacadie River origin, with one U.S.A. migrant, and no hybridization detected. Proportions in Annapolis River were 2.4% for both Saint John River and U.S.A. origin and 95.2% Shubenacadie River origin. Labrador bass (n=8) were of Miramichi River origin, which is the first genetic evidence of Striped Bass expanding past its native northern range. Across the entire Atlantic coast into the BoF 48 (0.002%) transboundary recaptures have occurred from published studies using over two million external tags. These results indicate that U.S.A. migrants present in the Minas Basin are insignificant and the adjustment necessary for the Shubenacadie River population would be negligible.
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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 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| 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 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".