The Effects of Elevated Population Density on North American Red Squirrel (Tamiasciurus hudsonicus) Behavior
Notice bibliographique
Résumé
Urbanization is one of the most significant drivers of changes in wildlife population densities, as it often results in habitat fragmentation, degradation, and loss, decreasing the suitability of habitat for wildlife. Many species in urban areas experience higher population densities compared to undisturbed areas. My study is predicated on an experiment that elevated the population density of wild North American red squirrels (Tamiasciurus hudsonicus). The purpose of this study was to investigate the behavioral changes as a result of this increase in population density and whether any resulting behavioral changes are a result of natural selection, as opposed to behavioral plasticity. I leveraged a long-term behavioral database from the Kluane Red Squirrel Project to assess the differences in two behaviors (activity and aggression) recorded from squirrels in a standardized behavioral assay (open-field trial and mirror-image simulation) between the high-density experimental area and lower-density control areas. I then performed behavioral tests on individuals from the high-density area to assess how the number of maternal generations an individual’s lineage had experienced in the high-density area affected activity level, aggression, and docility. Previous studies show that female red squirrels that were more aggressive and less active in conditions where competition was elevated had higher reproductive success. Because of this, I predicted a decrease in activity level and increase in aggression with elevated population density. Because these behaviors have been shown to be genetically heritable in red squirrels, I predicted this would be a result of natural selection and there would be an increase in the frequency of these behaviors with increasing maternal generation time in the area of elevated density. My results showed squirrels from the area with elevated population density were significantly less active than those from the control areas. There was no relationship with aggression between density levels, or with any behavior and maternal generation time. These results show that elevated population density could influence behavior but suggests that perhaps these changes are due to behavioral plasticity rather than natural selection.
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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) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 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 ».