Blue-winged Teal (Anas discors) Science Article 1 abstract True metabolizable energy (TME) is a measure of avian dietary quality that accounts for metabolic fecal and endogenous urinary energy losses (EL) of non-dietary origin. The TME is calculated using a bird fed the test diet and an estimate of EL derived from another bird (Paired Bird […]

Black-bellied Tree-Duck (Dendrocygna autumnalis) Science Article 1 abstract There are two distinguishable subspecies of the Black-bellied Whistling-Duck, one in South America to eastern Panama and one from western Panama through Central America to the southernmost United States. The type locality of the species is the West Indies, but there is little evidence that birds from […]

Barrows Goldeneye (Bucephala islandica) Science Article 4 abstract We studied the timing, duration, and rate of wing molt of male Barrow’s Goldeneye (Bucephala islandica). The mean daily change in primary feather length was 2.6%, which is consistent with rates reported for other waterfowl species. The mean length of the flightless period was 31 days (range: […]

Barrows Goldeneye (Bucephala islandica) Science Article 6 abstract Naturally occurring stable isotopes in foodwebs can be used to determine the relative contributions of endogenous and exogenous nutrients to avian eggs in cases where birds move between isotopically distinct biomes or habitats to breed. We measured 13C and 15N values in somatic muscle tissues and eggs […]

Barrows Goldeneye (Bucephala islandica) Science Article 2 abstract Moult characteristics and habitat selection of postbreeding male Barrow’s Goldeneye (Bucephala islandica) in northern Yukon van de Wetering, D. E, M.Sc. thesis, Simon Fraser Univ., Burnaby, BC, Canada. Download article download full text (pdf)

Barrows Goldeneye (Bucephala islandica) Science Article 1 abstract The world distribution of Barrow’s Goldeneye (Bucephala islandica) consists of threeseparate populations: 150 000 to 200 000 birds in western North America (Eadie et al 2000),a resident population of 2000 in Iceland (Gardarsson 1978), and approximately 4500 birds ineastern North America (Savard and Dupuis 1999; Robert et […]

Barrows Goldeneye (Bucephala islandica) Science Article 5 abstract Processes underlying parental care decisions and creching behaviour: clarification of hypotheses Hannu Poysa and Markku Milonoff, Ann. Zool. Fennici 36: 125-128 Fennici 36: 125-128 Download article download full text (pdf)

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 […]

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 […]

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, […]