Ranging behaviour of yellow necked-mouse Apodemus flavicollis in an endemic area for TBE in Trentino, Italian Alps
Notice bibliographique
Résumé
This research is part of a long-term study on the host-vector-pathogen system of some tick-borne diseases, mainly tick-borne encephalitis (TBE), an emerging pathology transmitted in Europe by the tick Ixodes ricinus. The yellow-necked mouse Apodemus flavicollis, extensively distributed in the beech woodlands in Trentino (Eastern Italian Alps), plays a crucial role in the ecology of TBE as reservoir host of the immature stages of the vector of the causative agent of this disease; in particular, this species can amplify the TBE virus both through viremic and non-viremic transmission (i.e. between co-feeding ticks). Our previous results indicated sexually mature males as the functional group most accountable for disease transmission, due to their tick burden, in average higher than in females. The aim of the present study is therefore to assess the ranging behaviour of both sexes and evaluate if it could account for this difference. A telemetry study was carried out in a TBE focus (Valle dei Laghi - Trentino, National grid reference: 1651959E, 5093546N). The field trial was based on capture-mark-recapture and radio-tracking techniques. We set up a 6.7 ha trapping grid (18x18 traps, 15 m spaced) with Ugglan live traps, which were activated 5 nights/month, from May to November. Some of the yellow-necked mouse individuals captured between July and October were fitted with radio-collars (BD-2C transmitter, Holohil System Ltd., Canada). The weight of radio-collars (1.8g, power: 3.3 mA, average life span: 53 days) never exceed 6% of the mice body weight. Only resident animals were marked with radio-collars, as determined by the number and localisation of recaptures. After capture, mice were anaesthetized, fitted with the collar and then allowed to rouse from sleep and adapt to the radio-collar in a terrarium, to be released in the capture point the following morning. Four radio-tracking sessions of three weeks were completed from July to October 2005. Individuals were radio-tracked by homing-in, aiming at a precision of localisation of 3.5 m; animal movements were recorded from dusk to dawn, so that the interval between successive fixes was not less than 60 minutes. One fix/day/animal was also recorded in daylight, to localise burrows. Date, time, meteorological conditions, activity and, when possible, position below or above ground and behaviour were recorded along with the localisation. A total of 746 diurnal and 3256 nocturnal fixes from 39 mice, 26 males and 13 females, were recorded. From a minimum of 11 to a maximum of 18 individuals were simultaneously monitored during each radio-tracking session. The mean number of localizations per animal per session was 12,41 ± 0,84 for diurnal and 57,81 ± 8,00 for nocturnal fix. Home range were calculated as minimum convex polygon (MCP 95%) and Kernel probability distribution (Kernel 95%) by the software R, package Adehabitat; spatial analyses were performed by means of ArcGis 9.0. The mean size of male’s home range was 9057.01 m2 ± 1624.75 and 6530.94 m2 ± 1207.16 for kernel 95% and MCP 95% respectively; for females, it was 5143.39 m2 ± 782.21 and 3627.10 m2 ± 665.93 for kernel 95% and MCP 95% respectively; the mean home range size, both for Kernel and MCP, highly differed between sexes (Mann-Whitney U-Test: Z= 3.14, p< 0.01; Z= -3.03, p< 0.01).
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 machine sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Le volet Gemma est une étiquette directe du modèle pour chaque travail de la base, lue sur la notice réduite au titre. Le volet Codex est un classifieur appris des 10 348 étiquettes directes de Codex et calibré sur les taux pondérés de l'échantillon; les champs sans appui suffisant ne portent aucun appel Codex. Le mode candidate est l'union des deux volets; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont pas des étiquettes humaines.
Scores du classifieur distillé par catégorie (deux têtes)
| 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 | 0,001 | 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) | 0,001 | 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 source (Gemma direct ou Codex distillé), 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 ».