Brant Goose (Branta bernicla) Science Article 8 abstract In an area north of the Pyasina delta in Taimyr (Russia), nest distribution, nest initiation and breeding success of Brent Geese Branta bernicla bernicla were studied in six successive summer seasons from 1990-1995 in relation to lemming and Arctic Fox Alopex lagopus abundance. Lemming abundance conformed to […]
Tag: Brant Goose
The significance of female body stores for egg laying and incubation in Dark-bellied Brent Geese Branta bernicla bernicla
Brant Goose (Branta bernicla) Science Article 10 abstract The probability of successful breeding by Brent geese in the Arctic appears to be positively correlated with the mass of females when they depart from spring staging areas in North-western Europe. To clarify the mechanism behind this relationship we investigated the significance of flown-in female body stores […]
Inland pastures are an appropriate alternative for salt-marshes as a feeding area for spring-fattening Dark-bellied Brent Geese Branta bernicla.
Brant Goose (Branta bernicla) Science Article 9 abstract On the Dutch Wadden Sea island Texel, spring-fattening Dark-bellied Brent Geese Branta bernicla fed almost exclusively inland on improved grasslands, whereas the remainder of the flyway population utilised coastal salt-marshes elsewhere in the Wadden Sea. There are indications that inland pastures are ‘second choice habitat’ during this […]
Dark-bellied Brent Geese Branta bernicla bernicla in Britain, 1976-1987.
Brant Goose (Branta bernicla) Science Article 5 abstract The numbers of Dark-bellied Brent Geese wintering in Britain have increased from 47 500 in 1976-77 to 90-95 000 in the early and mid-1980s. The proportion of the European population in Britain had been largely constant during this time, at 40-48%, though reaching 56-59% in some winters. […]
Food exploitation patterns by Brent Geese Branta bernicla during spring staging.
Brant Goose (Branta bernicla) Science Article 4 abstract The exploitation pattern of a salt marsh community by Brent Geese in spring is discussed. The two main vegetation types on the salt marsh, one dominated by Puccinellia maritima and the other characterized by the presence of Plantago maritima and Triglochin maritima, are grazed very intensively, so […]
The applicability of age ratio and brood size counts in population dynamic studies of the Brent Goose Branta bernicla bernicla.
Brant Goose (Branta bernicla) Science Article 3 abstract In wintering Brent Geese, annual assessments of the proportion of juveniles and the mean brood size have been made since the 1950s, allowing population dynamic analyses. Field procedures have never been quantitatively explored and were studied in four areas along the Dutch Wadden Sea in 1975/76. Juveniles […]
Historical changes in black brant Branta bernicla nigricans use on Humboldt Bay, California
Brant Goose (Branta bernicla) Science Article 1 abstract We examined 70 years (1931-2000) of black brant Branta bernicla nigricans abundance on Humboldt Bay, California. We used linear regression to convert count data to a standard variable (use-days) for evaluating hypotheses that explain temporal trends in brant use. Winter and spring brant-days on Humboldt Bay declined […]
Differences in migratory pattern and habitat choice between social classes of the Brent Goose Branta bernicla bernicla.
Brant Goose (Branta bernicla) Science Article 2 abstract Age ratio (% juveniles) counts of Brent Goose flocks provide a crude index of their social composition (families versus subadults and failed breeders). In 1975/76, the possible impact of habitat and season was studied in four areas along the Dutch Wadden Sea. Sightings of birds colour-ringed in […]
Regulation of numbers of Dark-bellied Brent Geese Branta bernicla bernicla on spring staging sites.
Brant Goose (Branta bernicla) Science Article 6 abstract The usage of the Boschplaat salt-marsh on Terschelling over a 30-year period by Brent Geese Branta b. bernicla, is compared with that on improved grassland on Texel. Natural salt-marsh turns out to be a preferred spring staging habitat. Spring feeding on grassland is a new phenomenon. An […]
The possible importance of nutritional requirements for Dark-bellied Brent Geese in the seasonal shift from winter cereals to pasture.
Brant Goose (Branta bernicla) Science Article 7 abstract The use by Brent Geese of five pairs of winter cereal and pasture fields at Pagham Harbour, West Sussex, England was measured from November 1991 through the end of March 1992. A switch from winter cereals to pasture was observed between November and December. Monthly vegetation samples […]