Resources related to Reproduction

Breeding Propensity of Female Harlequin Ducks

JOURNAL OF WILDLIFE MANAGEMENT 72(6):1388–1393; 2008)
Breeding propensity, the proportion of sexually mature females that initiate egg production,
can be an important demographic trait when considering reproductive performance and,
subsequently, population dynamics in birds. We measured egg production using yolk
precursor (vitellogenin and very-low-density lipoprotein) analyses and we measured nesting using radiotelemetry to quantify breeding propensity of adult female harlequin ducks (Histrionicus

Breeding Propensity of Female Harlequin Ducks

Origin and Availability of Large Cavities for Barrow’s Goldeneye (Bucephala islandica), a Species at Risk

Large secondary-nesting birds such as ducks rely on appropriate cavities for breeding. The main objective of this study was to assess the availability of large cavities and the potential of a managed boreal coniferous landscape to provide nesting trees within the breeding area of the eastern population of Barrow’s Goldeneye (Bucephala islandica), a cavity-nesting species at risk in Canada.

Origin and Availability of Large Cavities for Barrow’s Goldeneye (Bucephala islandica), a Species at Risk, Eastern Boreal Forest

Key Marine Habitat Sites for Migratory Birds in Nunavut and the Northwest Territories.

The Canadian Arctic contains much of Canada’s coastal and marine zones, and these areas support
tremendous numbers of marine birds. At the start of the 21st century, the Canadian marine zone is
the subject of much concern as a result of a variety of anthropogenic threats. The Canadian
Wildlife Service (CWS) is the federal agency responsible for the conservation of migratory bird
populations and their habitats in Canada. As part of its mandate, CWS has produced this report
identifying key marine habitat

Key Marine Habitat Sites for Migratory Birds in Nunavut and the Northwest Territories.

Birds at Risk: The Importance of Canada’s Boreal Wetlands and Waterways

This report looks at three natural areas in the boreal forest that are critical for birds,
but that are coming under pressure from industry, hydropower, and climate change.
We discuss some strong policy steps governments must take in order to protect the
watery forest and the great biodiversity of birds it supports.

Birds at Risk: The Importance of Canada’s Boreal Wetlands and Waterways

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