Tag: all of Branta

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 […]

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 […]

Foraging behavior and site selection of Barnacle Geese Branta leucopsis in a traditional and newly colonized spring staging habitat

Barnacle Goose (Branta leucopsis) Science Article 3 abstract For three weeks in May the Svalbard Barnacle Geese Branta leucopsis stop to feed on the archipelagos of the Helgeland district, up to 50 km out to sea off western Norway. However, since 1980 an increasing part of the population has moved to a newly exploited agricultural […]

The flight energetics of barnacle geese (Branta leucopsis) underwild and captive conditions

Barnacle Goose (Branta leucopsis) Science Article 2 abstract Experimental data on the relationship between mean heart rate (fH) and mean rate of oxygen consumption (VO2) ofcaptive barnacle geese during flights in a wind tunnel are reviewed in terms of their capacity to predict the mean VO2 of wildbarnacle geese, based on recordings of their fH […]

Estimation of annual adult survival rates of Barnacle Geese Branta leucopsis using multiple resightings of marked individuals.

Barnacle Goose (Branta leucopsis) Science Article 5 abstract Accuracy and feasibility of three different methods to estimate adult annual survival rates in a migratory population of Barnacle Geese Branta leucopsis are examined. Estimates from resightings of birds marked with coloured leg-rings prve to be the more accurate. Bothe estimates derived from recoveries of metal-ringed birds, […]

Breeding range translates into staging site choice: Baltic and Arctic Barnacle geese Branta leucopsis use different habitats at a Dutch Wadden Sea Island.

Barnacle Goose (Branta leucopsis) Science Article 8 abstract Habitat use of two populations of Barnacle Goose Branta leucopsis, one arctic and one temperate breeding, was studied on Schiermonnikoog, an island in the Dutch Wadden Sea, during winter and spring 1988/89. Although both populations have overlapping winter ranges, habitat choice on a smaller scale differed in […]

Heart rate and the rate of oxygen consumption of flying and walking barnacle geese (Branta leucopsis) and bar-headed geese (Anser indicus)

Barnacle Goose (Branta leucopsis) Science Article 1 abstract We tested the hypotheses that the relationship between heart rate (fH) and the rate of oxygen consumption (V . O,) differs between walking and flying in geese and that fH and O, have a U-shaped relationship with flight speed. We trained barnacle geese Branta leucopsis (mean mass […]

Site tenacity and mobility of staging Barnacle Geese

Barnacle Goose (Branta leucopsis) Science Article 6 abstract The within season site tenacity of staging Barnacle Geese Branta leucopsis was investigated using two years of observations of individually colour ringed birds in Schleswig Holstein/Germany. Arrays of observations of individual geese show that some birds move among areas in Schleswig Holstein within seasons. Movements occur over […]

Variation in growth of young and adult size in Barnacle Geese Branta leucopsis: Evidence for density dependence

Barnacle Goose (Branta leucopsis) Science Article 7 abstract A colony of Svalbard Barnacle Geese Branta leucopsis was studied near Ny Alesund, Spitsbergen. Breeding started in 1980 and the colony size followed a sigmoidal curve with little increase in numbers in the period 1992-1995. Over the period 1991-1995 gosling growth declined, mortality during growth increased and […]

Travels and traditions: long-distance dispersal in the Barnacle Goose Branta leucopsis based on individual case histories

Barnacle Goose (Branta leucopsis) Science Article 12 abstract Long-distance dispersal can have far-reaching consequences for the amount of gene flow between populations. However, individuals usually disperse to places well outside the study area, which makes long-distance dispersal hard to study. In this study, the fate of c. 4500 individually marked Barnacle Geese Branta leucopsis hatched […]