Coastal Dispersal by Pre-breeding African Black Oystercatchers Haematopus Moquini
Bibliographic record
Abstract
African Black Oystercatcher Haematopus moquini high-tide roost sites were located and mapped along the Atlantic coasts of South Africa and Namibia.Nearly all roosts checked contained juvenile and/or immature, individually colour-banded birds.A series of dispersal roosts were identified along the coastline, with the largest roosts being in central Namibia.Birds forage at or near the roost sites at low tide.Of birds banded in southwestern South Africa with confirmed dispersal endpoints, 65% dispersed north of Lderitz, Namibia (average travel distance of 1 595 km from natal site), 11% dispersed to northwestern South Africa (average travel distance 548 km), 19% dispersed within southwestern South Africa (average travel distance 141 km), and 5% dispersed eastward along the south coast of South Africa (average travel distance 237 km).At least 22% of re-sighted birds departed in their first year of life, and 25% returned in their third or fourth year of life.Body condition, sex and relative hatch date were not associated with roost site distances from natal colonies.Dispersal connectivity is weak in this species, as immature birds of different ages and origins mixed at roost sites along the dispersal route.
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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 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.002 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.006 | 0.002 |
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; both teacher heads agree on what is shown here.
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".