Notice bibliographique
Résumé
Birds demonstrate incredible intra- and interspecific diversity in various egg traits. In particular, there is considerable diversity in egg shape across bird species from nearly spherical to extremely pyriform (pointed) eggs. This variation in avian egg shape has long fascinated researchers and numerous efforts have been made to quantify egg shape traits and examine the possible evolutionary drivers and functions of the observed patterns of avian egg diversity. Previous studies have attempted to examine egg shape at various taxonomic scales and the evidence from these studies collectively suggest that avian egg shape diversity might be driven by two main sources: (i) indirect selection via anatomical constraints or life history trait changes, and/or (ii) direct adaptive selection during the incubation period. However, it is still unclear as to how important these drivers of egg shape diversity are and how their importance might alter at different taxonomic scales. Furthermore, current studies on avian egg shape lack a universally agreed method of accurately quantifying all egg shapes, which makes comparing studies and assimilating overall patterns of egg shape diversity challenging. \n \nThis thesis presents published work that aims to contribute further to the understanding of avian egg shape diversity. Firstly, the thesis presents a paper highlighting a novel automated image analysis method that more accurately quantifies egg shape, compared to previous modelling methods, that could be used by all future studies. Second, the thesis presents several papers examining the adaptive function of the extremely pyriform egg of the Common Guillemot (Uria aalge). In these papers, evidence is presented that brings in to question the plausibility of the previously popular ‘rolling-in-an-arc’ adaptive explanation. Instead, three new alternative adaptive hypotheses for the Common Guillemot’s pyriform egg are presented: (i) mechanical damage prevention/limitation; (ii) faecal-debris contamination limitation, and (iii) increased stability. Based on current available evidence, it is concluded that the stability hypothesis is currently the strongest supported adaptive explanation for the Common Guillemot’s pyriform egg shape. Thirdly, the thesis presents a published paper that looked to examine potential drivers of egg shape patterns at a broader taxonomic scale. Here, the paper examined patterns of egg shape in alcids (Alcidae) and penguins (Spheniscidae), two taxa containing species with considerable variations in egg shape and incubation environments and behaviours. In this study, evidence is presented that highlights the importance of incubation site characteristics as a driver of egg shape variation, something not evident in some other studies at broader taxonomic scales.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,001 | 0,001 |
| Bibliométrie | 0,000 | 0,001 |
| Études des sciences et des technologies | 0,000 | 0,001 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,002 | 0,001 |
| Intégrité de la recherche | 0,001 | 0,001 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,009 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».