Impacts of Intraspecific Kleptoparasitism and Diet Shifts on Razorbill Alca Torda Productivity at the Gannet Islands, Labrador
Bibliographic record
Abstract
Impacts of intraspecific kleptoparasitism and diet shifts on Razorbill Alca torda productivity at the Gannet Islands, Labrador.Marine Ornithology 35: 1-7.Intraspecific kleptoparasitism, the stealing of food from members of the same species, has received widespread but mostly superficial attention in the scientific literature.However, the effects of such behavior can be significant.Here we report on high rates of intraspecific kleptoparasitism in the Razorbill Alca torda at the Gannet Islands, a behavior that appears to be colony-specific.Razorbills carry their prey conspicuously in the bill, making them vulnerable to kleptoparasitic attacks from neighboring birds.We examined the relationship between the frequency of kleptoparasitic attacks and the prey species carried by breeding adults.During 2003-2006, 69% of all Razorbills carrying food to a chick were attacked (n = 182) and of these attacks, 18% (n = 22) were successful.Group attacks (two or more kleptoparasites) were more successful numerically (27%, n = 71), but only one member of the group ever received the reward.The frequency of kleptoparasitism observed by Razorbills at the Gannet Islands is one of the highest reported for any seabird, including many specialist kleptoparasites such as frigatebirds.This finding, combined with the lowest observed Razorbill productivity (overall success = 0.39, n = 222) for the Gannet Islands and drastic shifts in diet, may indicate decreased food availability.
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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 | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.001 |
| 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".