Thick-Billed Murres <i>Uria lomvia</i> at Cape Parry, Northwest Territories: Core-use Areas, Morphometrics and Chick Diets
Bibliographic record
Abstract
Cape Parry is home to the only colony of Thick-billed Murres Uria lomvia in the western Canadian Arctic, but ecological information for this small, isolated population is lacking. To address this information gap, we investigated the spatial distribution, diving behaviour, diet, and morphometrics of male and female Cape Parry Thick-billed Murres during the breeding season. We tracked 23 chick-rearing adults (seven females and 16 males) using Global Positioning System (GPS) tags with depth sensors (2021) and collected chick diet data (2021, 2022) using observations and photos. Cape Parry murres foraged relatively close to the colony (4.5 ± 3.3 km) and mostly within the marine boundaries of the Anguniaqvia Niqiqyuam Marine Protected Area (ANMPA). Core-use foraging areas (50% utilization distribution [UD] of dive locations) and diving depths (up to 70 m) coincided with the relatively shallow waters near Cape Parry. There was no difference between sexes in foraging locations, but there was a clear difference between sexes in foraging times, as has been reported in other studies. Dive bouts at night, mostly performed by males, consisted of more frequent, shallower dives compared with daylight diving. Dive bout duration and calculation of murre diving efficacy suggest foraging effort (“time spent feeding”) was similar between day and night. Adults delivered fish up to 142 mm in length to their chicks, with a majority (81%‒90%) consisting of pelagic Arctic Cod Boreogadus saida, benthic Daubed Shanny Leptoclinus maculatus, and benthic Sandlance Ammodytes spp., with a higher proportion of Artic Cod delivered in 2022 compared to 2021. Morphometric measurements placed Cape Parry females closer to Atlantic than Pacific colonies, and Cape Parry males were positioned between the two geographic groups. In summary, this study provides the first spatial and foraging ecology data for the Cape Parry population of Thick-billed Murres, which is crucial for management and evaluating the adequacy of the ANMPA in supporting this species.
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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 | 0.001 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.005 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.002 |
| Research integrity | 0.001 | 0.001 |
| 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 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".