A retrospective insight into the potential effects of parasites on the eastern loggerhead shrike (Lanius ludovicianus spp.) captive-breeding program in southeastern Canada
Bibliographic record
Abstract
Recovery programs around the globe attempt to mitigate the current biodiversity crisis. Captive breeding programs (CBPs) are one of the tools to attempt conserving diverse threatened or endangered species. This study investigates the CBP of an endangered passerine species in southeastern Canada, the eastern loggerhead shrike (Lanius ludovicianus spp.; ELOSH) in the context of one of the most common sanitary challenges in captivity: parasitic infections. Endoparasites can cause damage directly and/or indirectly and may lead to restriction of growth and reproductive functions of their host. This thesis objective is to draw attention to the importance of host-parasite interactions in captive-breeding settings, as well as study the potential effects on breeding success, by collection and analysis of historical data. Two separate datasets were used to conduct the statistical analysis (1) one to describe the parasitic prevalence and abundance, and its effects on the captive population, and (2) another to examine the effects of such parasites in the reproductive output of ELOSH females. Male-biased and juvenile-biased parasitism were observed among the individuals parasitized by Capillaria sp. In females, the abundance of Capillaria sp. was the only significant factor negatively affecting their reproductive output. Altogether, the results highlight the importance of parasitic management in CBPs, especially for endangered species, where it is essential to prevent any further threats to an already scarce population.
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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 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".