NESTING BIOLOGY OF THE YELLOW WARBLER AT THE NORTHERN LIMIT OF ITS RANGE
Bibliographic record
Abstract
The nesting biology of the Yellow Warbler (Dendroica petechia) was studied at the northern limit of its breeding range at Churchill, Canada.This region is colder and has a shorter breeding season than any in which the species was previously studied.Yellow Warblers arrived in Churchill before most deciduous vegetation had emerged and, in some instances, when snow still covered the ground.Warblers at this location built larger and better insulated nests than in southern populations, presumably as an adaptation against the cooler temperatures.Clutch size averaged 4.65 eggs and was larger than in all other populations studied so far, except those in Alaska.Nestlings grew rapidly and survivorship was similar to southern populations; only about 4% of chicks were lost through brood reduction.Males fed young more frequently than females or males in southern areas.These observations suggest that Yellow Warblers may compensate for the short subarctic summer by arriving on the breeding grounds earlier, building larger and better insulated nests, and investing more in male parental care than birds in other locations.BIOLOG•A DE ANIDAMIENTO DE DENDROICA PETECHIA EN EL I_.[MITE NORTE DE SU DISTRIBUCION Sinopsis.--Seestudio la biologia de anidamiento de Dendroica petechia en el limite norte de su distribucitn en CanadS.Esta regitn es mss frla y tiene una 6poca de reproduccitn m5s cotta que cualquier otra en donde la especie haya sido estudiada.Estas aves 11egan a Churchill antes de que la mayorCa de la vegetacitn haya emergido yen ocasiones cuando la nieve afn cubre el terreno.En esta localidad estos pajarillos construyen nidos m5s grandes y mejor insulados que otras poblaciones m/rs al sur, probablemente como una adaptacitn alas temperatufas m/rs bajas.E1 tamafio promedio de la camada result6 set de 4.65 huevos y result6 mayor que todas las otras poblaciones estudiadas, excepto la de Alaska.Los pichones crecieton r•tpido y la supervivencia result6 similar al de otras poblaciones m5s al sur; tan solo el 4% de los polluelos se perdieron.Los machos alimentaron a los polluelos con mayor frecuencia que las hembras y otros machos de poblaciones m/rs al sur.Estas observaciones sugieren que 6ste p•tjaro podr/a muy bien compensar lo corto del verano sub•wtico, 11egando alas 5reas de reproduccitn m5s temprano, construyendo nidos m•ts grandes e insulados y los machos ofreciendo una mayor inversitn parental que las aves de otras localidades.
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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 | 0.000 |
| 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".