Auch in den arktischen Brutgebieten sind Wildgänse und ihre Brut durch Fressfeinde wie den Eisfuc... more Auch in den arktischen Brutgebieten sind Wildgänse und ihre Brut durch Fressfeinde wie den Eisfuchs (Alopex lagopus) oder die Eismöwe (Larus hyperboreus) gefährdet. In diesem Bericht wird am Beispiel von Weißwangengänsen (Branta leucopsis) das Verhalten der Vermeidung von Prädation auf Svalbard mit dem der auf Kolguyev brütenden Artgenossen untersucht. Die Unterschiede und Gemeinsamkeiten werden diskutiert.On the breeding grounds geese and their broods are threatened by predators like polar foxes (Alopex lagopus) or Glacous Gulls (Larus hyperboreus). In this review we compare antipredation behaviour of breeding and broad rearing Barnacle Geese (Branta leucopsis) on Svalbard and Kolguev. Similarities and differences are presented and discussed
Recent telemetry studies and older Finnish studies have purported that the remnants of the Fen-no... more Recent telemetry studies and older Finnish studies have purported that the remnants of the Fen-noscandian Lesser White-fronted Goose population (currently estimated at about 20 breeding pairs) first migrate east to the Kanin Peninsula or the mouth of Ob river, and even as far as the eastern part of the Taimyr Peninsula to moult. Subsequently, they migrate via northern Russia and the Baltic States to eastern Germany and from there via Hungary to Greece. It has also been suggested that the birds of the re-established Swedish Lesser White-front Goose population were imprinted on a completely new migratory route by their Barnacle Goose foster-parents. To study if this view is correct, historical literature sources as well as observations of Lesser White-fronted Geese in Sweden were collected and analysed. To exclude birds of the re-established Swedish population only data of the period 1900 – 1981 were used. A total of 353 observations of more than 3,600 individuals were collected and a...
Auch in den arktischen Brutgebieten sind Wildgänse und ihre Brut durch Fressfeinde wie den Eisfuc... more Auch in den arktischen Brutgebieten sind Wildgänse und ihre Brut durch Fressfeinde wie den Eisfuchs (Alopex lagopus) oder die Eismöwe (Larus hyperboreus) gefährdet. In diesem Bericht wird am Beispiel von Weißwangengänsen (Branta leucopsis) das Verhalten der Vermeidung von Prädation auf Svalbard mit dem der auf Kolguyev brütenden Artgenossen untersucht. Die Unterschiede und Gemeinsamkeiten werden diskutiert.On the breeding grounds geese and their broods are threatened by predators like polar foxes (Alopex lagopus) or Glacous Gulls (Larus hyperboreus). In this review we compare antipredation behaviour of breeding and broad rearing Barnacle Geese (Branta leucopsis) on Svalbard and Kolguev. Similarities and differences are presented and discussed
Recent telemetry studies and older Finnish studies have purported that the remnants of the Fen-no... more Recent telemetry studies and older Finnish studies have purported that the remnants of the Fen-noscandian Lesser White-fronted Goose population (currently estimated at about 20 breeding pairs) first migrate east to the Kanin Peninsula or the mouth of Ob river, and even as far as the eastern part of the Taimyr Peninsula to moult. Subsequently, they migrate via northern Russia and the Baltic States to eastern Germany and from there via Hungary to Greece. It has also been suggested that the birds of the re-established Swedish Lesser White-front Goose population were imprinted on a completely new migratory route by their Barnacle Goose foster-parents. To study if this view is correct, historical literature sources as well as observations of Lesser White-fronted Geese in Sweden were collected and analysed. To exclude birds of the re-established Swedish population only data of the period 1900 – 1981 were used. A total of 353 observations of more than 3,600 individuals were collected and a...
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