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| Content Provider | Springer Nature Link |
|---|---|
| Author | Gortázar, C. |
| Copyright Year | 1997 |
| Abstract | Die relative Häufigkeit von Fuchs(Vulpes vulpes) und Wildkaninchen(Oryctolagus cuniculus) wurde mit Hilfe von Nachtbeobachtungen im Ebrobecken in Spanien untersucht, wo die hämorrhagische Kaninchenkrankheit in den wildlebenden Kaninchenvorkommen endemisch ist. Von 1992 bis 1997 wurden an dreizehn Orten 500 Nachtzählungen vorgenommen, deren Ergebnisse in relative Häufigkeitsindizes konvertiert wurden (Tabellen 1,2). Es wurden örtliche Veränderungen in der jährlichen Fuchs- und Kaninchendichte festgestellt. Für das Kaninchen wurden sogar jährliche Schwankungen auf regionaler Ebene festgestellt. Keine der beiden Arten zeigt einen generalisierten Trend zur Bestandszuoder-abnahme (Abb.). Mögliche Ursachen der lokalen Häufigkeitsschwankungen und die ökologischen Folgen des Kaninchenrückgangs werden diskutiert.The relative abundance of red fox(Vulpes vulpes) and wild rabbit(Oryctolagus cuniculus) was studied by nightspotting in the Ebro Bassin, Spain, where rabbit haemorrhagic disease is enzootic in free-living rabbit populations. From 1992 to 1997, 500 nightcounts were performed at 13 localities, and the results were converted into relative abundance indexes (Tabl. 1, 2). Local changes in yearly red fox and rabbit abundance were detected. For the rabbit, even yearly differences in abundance on a regional scale were found. None of the two species shows a generalized trend of population growth or decrease (Fig.). Possible causes of local abundance changes, and the ecological consequences of rabbit decline are discussed.La fréquence relative du Lapin (Oryctolagus cuniculus) et du Renard (Vulpes vulpes) a été étudiée, en faisant appel à des observations nocturnes, dans le Bassin de l'Ebre en Espagne, où la maladie hémorragique virale du Lapin existe à l'état endémique. De 1992 à 1997, en treize endroits, 500 comptages nocturnes ont été effectués; leurs résultats ont été convertis en indices de fréquence relative (Tabl. 1 et 2). Des différences locales d'abondance des Lapin et Renard ont été relevées annuellement. Pour le Lapin, des variations annuelles ont même été constatées de région à région. Aucune des deux espèces ne manifeste de tendance générale à l'augmentation ou à la diminution (Fig.). Les causes possibles des variations locales ainsi que les conséquences écologiques de la régression du Lapin font l'objet d'une discussion. |
| Starting Page | 259 |
| Ending Page | 265 |
| Page Count | 7 |
| File Format | |
| ISSN | 00442887 |
| Journal | European Journal of Wildlife Research |
| Volume Number | 43 |
| Issue Number | 4 |
| e-ISSN | 14390574 |
| Language | French |
| Publisher | Springer-Verlag |
| Publisher Date | 1997-01-01 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Animal Ecology Zoology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Ecology Animal Science and Zoology |
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