Trophic distress of juvenile salmon in Johnstone/Queen Charlotte Strait?
Bibliographic record
Abstract
Johnstone Strait and Queen Charlotte Strait are situated between the northern end of Vancouver Island and the British Columbia mainland, connecting the Strait of Georgia to Queen Charlotte Sound. For juvenile salmon, this area provides a migratory corridor between initial marine rearing areas in the Strait of Georgia to Queen Charlotte Sound and the Gulf of Alaska. Tidal mixing homogenizes the water column in the narrow passages of this region, creating both an unstable water column with relatively low primary productivity and dissipation of any zooplankton or juvenile fish patches. McKinnell et al. (in review) have suggested that this region represents a trophic challenge for juvenile salmon, as food is scarce and fish must transit this region to reach more favorable marine feeding grounds. They term this challenge the “Trophic gauntlet hypothesis”. We will present plasma insulin-like growth factor 1 (IGF1) data for juvenile salmon (coho, sockeye, chum, Chinook and pink) collected opportunistically in Queen Charlotte Sound, Queen Charlotte Strait, Johnstone Strait or the Strait of Georgia between 2009 - 2013. IGF1 is a hormone that is an index of the relative growth of fish. The trophic gauntlet hypothesis will be exposed to these data as we report on growth of juvenile salmon in Strait of Georgia, before they enter Johnstone Strait; in Johnstone Strait, the putative zone of deprivation; and then from Queen Charlotte Sound, after fish have presumably reached richer feeding grounds. Results from this challenge of the trophic gauntlet hypothesis may result in more directed studies of the marine ecology of juvenile salmon as they migrate through this region.
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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 | 0.000 | 0.000 |
| Science and technology studies | 0.001 | 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) | 0.002 | 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".