Current velocity and injection of GnRHa affect reproductive behavior and body composition of captively reared offspring of wild chinook salmon (<i>Oncorhynchus tshawytscha</i>)
Bibliographic record
Abstract
Captively reared adult Pacific salmon (Oncorhynchus spp.) released for natural spawning exhibit deficiencies in reproductive behavior. The effects of water current velocity in rearing tanks and gonadotropin-releasing hormone analogue (GnRHa) treatment on reproductive behavior of captively reared chinook salmon (Oncorhynchus tshawytscha) were examined. Treatment of females with GnRHa resulted in a significantly greater degree of nest guarding, earlier (more natural) onset of spawning, and higher frequency of aggression towards males. Current velocity did not significantly affect the female reproductive behaviors examined. Males reared under high current velocities (HV) spawned for the first time 2.4 days earlier, and alpha males reared in HV tanks defended their access to spawning females better than alpha males reared in low velocity (LV) tanks. Males reared in HV tanks had 34% lower protein content at the time of death than fish reared in LV tanks. Females reared in HV tanks had 38% lower lipid content, but the effects of current velocity were nonsignificant when accounting for significant random variation among tanks within treatments. Identifying and modifying environmental conditions that control hormonal changes during final maturation may lead to further improvements in reproductive performance of captively reared salmon.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.000 | 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) | 0.001 | 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".