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| Content Provider | Springer Nature Link |
|---|---|
| Author | Hackländer, K. Frisch, Claudia Klansek, E. Steineck, Theodora Ruf, T. |
| Copyright Year | 2001 |
| Abstract | Im Jahr 1998 wurde die Kondition und Fruchtbarkeitsrate von 57 adulten Häsinnen(Lepus europaeus) aus sieben Revieren Niederösterreichs analysiert. Häsinnen aus Revieren mit geringer Populationsdichte unterschieden sich nicht hinsichtlich Körpergewicht, Gesundheitszustand oder Anzahl an Uterusnarben von Häsinnen aus Revieren mit hoher Populationsdichte. 82,5 % der Häsinnen waren reproduktiv. Reproduzierende Häsinnen warfen im Mittel 9,6 Jungtiere, maximal 19. Es bestand die Tendenz, dass in Revieren mit geringer Populationsdichte der Anteil nichtreproduzierender Häsinnen (27 %) größer war als in Revieren mit hoher Populationsdichte (7 %). Häsinnen aus Revieren mit geringer Populationsdichte waren aufgrund des niedrigen Jagddrucks älter. Mit dem Alter nahm die Wahrscheinlichkeit des Auftretens pathologischer Uterusveränderungen zu, die in fast allen Fällen mit Unfruchtbarkeit verbunden war. Reviere mit unterschiedlicher Populationsdichte unterschieden sich nicht hinsichtlich ihrer Habitatstruktur, ihrem Anteil an naturnahen oder extensiv bewirtschafteten Flächen. Die Jahresniederschlagsmenge war jedoch in Revieren mit geringer Populationsdichte größer. Die Ursache für Unterschiede in der Populationsdichte zwischen den untersuchten Revieren ist daher nicht in der Fruchtbarkeit der Häsinnen bzw. der Rammler zu suchen, sondern liegt vermutlich an der unterschiedlichen Junghasenmortalität, die durch Unterschiede in den klimatischen Bedingungen erklärt werden können.We examined the reproductive rate and health status of 57 adult female European hares (Lepus europaeus) in seven hunting districts in Lower Austria in the year 1998. Females from areas of different population density showed no differences regarding body weight, health status, or numbers of placental scars. 82,5 % of all females had placental scars. The mean number of placental scars of parous females was 9,6, the maximum was 19. There was a tendency toward a higher proportion of nonparous females in areas of below-average population density (27 %) than in areas of above-average population density (7 %). Because of lower hunting pressure, females from areas with below-average population density were older. With increasing age the proportion of females with pathological uteri increased. Nearly all of these pathological uteri were combined with infertility. Areas of different population densities did not differ in habitat structure or in the proportion of natural parts (e.g., fallow fields). Annual precipitation was higher in areas of low population density. We suggest that differences in population density in our study sites are not due to different fertility of females or males, but could be ascribed to different mortality rate in leverets due to different climatic conditions.En 1998, la condition physique ainsi que le taux de fertilité de 57 hases adultes(Lepus europaeus), provenant de 6 territoires de Basse-Autriche ont été analysés. Les hases originaires de populations de faible densité ne se démarquaient pas du point de vue masse corporelle, état sanitaire ou nombre de cicatrices utérines par rapport aux hases provenant de populations vivant à forte densité. 82,5 % des hases étaient en état de se reproduire et mettaient bas en moyenne 9,6 levrauts, au maximum 19. Une tendance se manifeste selon laquelle, dans les territoires avec faible densité de population, la proportion de hases ne se reproduisant pas (27 %) était plus élevée que dans les territoires où la densité de population était plus forte (7 %). Les hases de territoires à faible densité de population étaient, du fait d'une pression de chasse plus faible, plus âgées. La probabilité de l'apparition d'altérations pathologiques de l'utérus augmentait en fonction de l'âge, altérations entraînant le plus souvent une infertilité. Les territoires présentant des densités variables ne se distinguaient pas quant à la structure de l'habitat ni quant au nombre de surfaces naturelles ou gérées de façon extensive. La pluviosité annuelle était cependant plus importante dans les territoires avec une faible densité de population. La cause des différences de densité de population entre les territoires étudiés ne se situe donc pas au niveau de la fertilité des hases ou des bouquins mais sans doute dans des différences du taux de mortalité lesquelles pourraient s'expliquer par des différences d'ordre climatique. |
| Starting Page | 100 |
| Ending Page | 110 |
| Page Count | 11 |
| File Format | |
| ISSN | 00442887 |
| Journal | European Journal of Wildlife Research |
| Volume Number | 47 |
| Issue Number | 2 |
| e-ISSN | 14390574 |
| Language | French |
| Publisher | Springer-Verlag |
| Publisher Date | 2001-01-01 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Lepus europaeus fertility population density body weight health status placental scars Animal Ecology Zoology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Ecology Animal Science and Zoology |
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