Bibliographic record
Abstract
Many behaviours exhibited by free-living animals that are crucial for survival and reproduction involve elevated levels of activity or "workload".Individuals with higher workload ability should be able to cope with the high metabolic demands imposed by these behaviours better and consequently would have higher fitness.High workload could also result in costs such as impaired reproduction or reduced survival.However, the underlying physiological mechanisms that allow individuals to have higher workload ability, and the mechanisms underlying costs of high workload remain poorly understood.This thesis took an exercise perspective and investigated the physiological basis of aerobic capacity and workload ability in birds, using both a comparative, phylogenetic approach, as well as various laboratory-based experimental approaches.In surveying the literature, we identified several potential common physiological markers underlying individual variation in exercise performance and costs of exercise.We also found that hematological traits co-vary with life-history variables, and to a certain extent, energy metabolism in birds at the interspecific level.Additionally, we provided experimental evidence for physiological responses to flight at high attitude and showed that the relationship between hematocrit and flight performance is dependent on altitude.Lastly, we provided experimental evidence for behavioural and physiological adjustments to high workload and demonstrated that physiological adjustments to high workload can negatively impact reproduction.Taken together, this thesis uncovered several physiological mechanisms underlying workload ability and costs of high workload in birds.Future work should consider and integrate multiple physiological systems when studying the physiological basis of workload ability, and more generally, life-history trade-offs in animals.Ultimately, we hope that the knowledge we gain from this thesis can be used to complement studies in free living animals and aid in the design of field experiments.
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".