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| Content Provider | Springer Nature Link |
|---|---|
| Author | Bensinger, Sylvie Kugelschafter, K. Eskens, U. Sobiraj, A. |
| Copyright Year | 2000 |
| Abstract | Die jährliche Reproduktionsleistung von Feldhasen (Lepus europaeus Pallas) wurde durch den Nachweis von Plazentationsstellen, die zuvor entsprechend angefärbt wurden erfasst.Die Probenentnahme erfolgte in den Jahren 1997 und 1998 im Zeitraum Oktober bis Dezember. Untersucht wurden 311 Uteri, 183 von adulten und 128 von juvenilen Häsinnen. 84% der adulten Weibchen waren nachweislich reproduktiv, bei den Junghäsinnen (unter einem Jahr) lag der Anteil bei 1%.Von den 30 nichtreproduktiven adulten Häsinnen wiesen 21 pathologische Uterusveränderungen auf. Auffällig war das hohe Durchschnittsalter der nichtreproduktiven, das bei über vier Jahren lag, im Vergleich zu den reproduktiven Tieren.Im Durchschnitt wurden 9,4 Plazentationsstellen pro Uterus bei den adulten Häsinnen (nichtreproduktive miteinbezogen) gezählt. Dieser Wert entspricht den aus der Literatur bekannten Angaben. Hinweise auf eine verminderte Fertilität weiblicher Tiere als Ursache für den kontinuierlichen Rückgang der Feldhasenpopulation konnten aus diesen Ergebnissen nicht abgeleitet werden.In the present study the reproduction performance of female European hares (Lepus europaeus) was estimated post mortem using the uterine placental scares as indicators for previous pregnancies. The determination was performed by counting the number of placentation sites after coloration (Bray andMarboutin, 1998).The sampling was carried out during the years 1997 and 1998 in the time period from October till December. Altogether 311 uteri, 183 uteri of adult and 128 of juvenile female hares could be examined. The age was calculated according to the eye lens weight. 84% of the adults and only 1 % of the juveniles showed reproduction.In 30 individuals no signs of pregnancies could be found. It was remarkable that 21 of them showed pathological alterations. All these animals were calculated to be older than four years old.On average 9,4 places of placentation could be counted per uterus in adult females (nonreproductives included). This value corresponds to the details found in the literature. In this respect no indications for a reduced fertility could be found.La faculté de reproduction annuelle du Lièvre d'Europe (Lepus europaeus Pallas, 1778) a été observée par le relevé des cicatrices placentaires préalablement colorées.La prise d'échantillons fut réalisée dans les années 1997 et 1998, d'octobre à décembre. 311 utérus ont été examinés, 183 provenant de sujets adultes et 128 de sujets juvéniles. 84% des femelles adultes étaient en phase de reproduction contre 1% chez les femelles juvéniles (soit âgées de moins d'un an).Des 30 hases adultes non-gestantes, 21 révélèrent des altérations pathologiques de l'utérus. L'âge moyen des femelles non-gestantes était notoirement plus élevé, soit plus de 4 ans, par rapport à celui des femelles en phase de reproduction. En moyenne, on releva 9,4 cicatrices placentaires par utérus chez les sujets adultes (en ce compris les femelles non-reproductives). Cette valeur correspond aux données connues de la littérature. On n'a pu déduire de ces résultats des indications sur une moindre fertilité des sujets femelles. |
| Starting Page | 73 |
| Ending Page | 83 |
| Page Count | 11 |
| File Format | |
| ISSN | 00442887 |
| Journal | European Journal of Wildlife Research |
| Volume Number | 46 |
| Issue Number | 2 |
| e-ISSN | 14390574 |
| Language | French |
| Publisher | Springer Berlin Heidelberg |
| Publisher Date | 2000-06-01 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Zoology Ecology Fish & Wildlife Biology & Management |
| Content Type | Text |
| Resource Type | Article |
| Subject | Ecology Animal Science and Zoology |
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