Fish spawning habitat suitability for local bed change around instream boulders: experimental investigation - II
Bibliographic record
Abstract
Fish populations depend on suitable spawning habitats, and species like salmon and trout require specific substrate conditions for successful reproduction. Instream boulders enhance habitat heterogeneity by creating depressions and riffle spots that provide well-oxygenated gravel beds for egg deposition and predator refuge. Restoration projects often use rock-ramp boulder arrangements to improve habitat functionality. This study experimentally investigated the relationship between instream boulder placement, bed erosion, and sediment deposition to assess spawning habitat suitability. A total of 18 scenarios were tested, varying boulder concentrations (λ = 0 to 8.30%) across three bed slopes (0.5%, 1.0%, and 1.5%). Findings indicate that lower boulder densities result in minimal local scour depth and sediment transport, creating favorable spawning conditions for salmonids. These results provide valuable insights for habitat restoration efforts, guiding optimal boulder placement and concentration to enhance spawning success while maintaining streambed stability.
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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 | 0.001 |
| 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 | 0.000 |
| 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".