Attraction of migrating adult sockeye salmon to conspecifics in the absence of natal chemical cues
Bibliographic record
Abstract
Directed animal movement, which drives behaviors such as natal philopatry or dispersal, is guided by the input of sensory information. Anadromous salmonids are philopatric (they return to their natal habitat to reproduce), and their upstream movements during the spawning migration are directed by olfactory cues. Two main sources of olfactory cues have been identified—imprinted natal cues and pheromones—although the relative importance of these cues is unresolved. We tested the response of migratory adult sockeye salmon ( Oncorhynchus nerka ) to conspecific odors in the presence of, and in the absence of, imprinted natal cues. The results indicate that sockeye salmon are attracted to conspecifics when imprinted natal cues are absent, but not when they are present. This suggests that pheromones may provide a directional cue that is secondary to the primary cue of imprinted chemicals. The finding follows the hierarchical navigation hypothesis and is supported by previous findings in salmonid research. There are several potential benefits to this method of navigation that could increase the reproductive success of stray migrants, which could promote dispersal and increase genetic diversity within populations.
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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 | 0.000 | 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 | 0.000 | 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".