scholarly journals Migration chronology and movements of adult American black ducks Anas rubripes wintering in Nova Scotia, Canada

2021 ◽  
Author(s):  
Liam E. Peck ◽  
Matthew D. English ◽  
Gregory J. Robertson ◽  
Shawn R. Craik ◽  
Mark L. Mallory
Keyword(s):  
Nova Scotia ◽  
Anas Rubripes ◽  
American Black ◽  
Migration Chronology

American Black Duck (Anas rubripes)

2000 ◽  
Author(s):  
Jerry R. Longcore ◽  
Daniel G. McAuley ◽  
Gary R. Hepp ◽  
Judith M. Rhymer
Keyword(s):  
Anas Rubripes ◽  
Black Duck ◽  
American Black ◽  
American Black Duck

American Black Duck (Anas rubripes)

2000 ◽  
Author(s):  
Jerry R. Longcore ◽  
Daniel G. McAuley ◽  
Gary R. Hepp ◽  
Judith M. Rhymer
Keyword(s):  
Anas Rubripes ◽  
Black Duck ◽  
American Black ◽  
American Black Duck

A 24-Hour Time-Energy Budget for Wintering American Black Ducks (Anas rubripes) and its Comparison to Allometric Estimations

Waterbirds ◽  
2014 ◽  
Vol 37 (3) ◽  
pp. 264-273 ◽  
Author(s):  
Orrin E. Jones ◽  
Christopher K. Williams ◽  
Paul M. Castelli
Keyword(s):  
Energy Budget ◽  
Anas Rubripes ◽  
American Black

Effects of a carbaryl-induced depression in invertebrate abundance on the growth and behavior of American black duck and mallard ducklings

1984 ◽  
Vol 62 (3) ◽  
pp. 452-456 ◽  
Author(s):  
Malcolm L. Hunter Jr. ◽  
Jack W. Witham ◽  
Hilary Dow
Keyword(s):  
Active Ingredient ◽  
Growth Rates ◽  
Anas Platyrhynchos ◽  
Anas Rubripes ◽  
Black Duck ◽  
Invertebrate Abundance ◽  
American Black ◽  
American Black Duck ◽  
And Behavior ◽  
Rate Of Movement

Aerially spraying ponds with carbaryl (Sevin-4-oilR) at 840 g active ingredient/ha reduced biomass and numbers of macroinvertebrates and decreased the growth rates of American black duck, Anas rubripes, and mallard. Anas platyrhynchos, ducklings in Maine. Ducklings on sprayed ponds spent more time searching for food and less time resting, and their rate of movement around the ponds was greater than for ducklings on unsprayed ponds.

Behaviour of unpaired male black ducks (Anas rubripes) during the breeding season in a Nova Scotia tidal marsh

1979 ◽  
Vol 57 (12) ◽  
pp. 2421-2428 ◽  
Author(s):  
Norman R. Seymour ◽  
Rodger D. Titman
Keyword(s):  
Nova Scotia ◽  
Breeding Season ◽  
Tidal Marsh ◽  
Tidal Estuary ◽  
Anas Rubripes ◽  
Pair Bonds ◽  
Communal Area

Behaviour of unpaired male black ducks throughout the breeding season was studied for 3 years (1973, 1974, 1978) in the marsh of a tidal estuary near Antigonish, Nova Scotia. Males remained primarily on a communal area in the marsh. Reproductively oriented activities occurred from late March until late May and peaked in frequency and intensity in early April. Most frequently daily display occurred from 0800 to 1300 hours. Unpaired males joined pairs singly or in groups but only grouped birds courted females. Unpaired males were tolerated on territories and some single males associated with pairs for several days. Groups joined pairs that foraged on the communal area, often persisting with them and disrupting their activity. Males appeared to prefer to court introduced unpaired females over paired females, which were always with their mates. Some males appeared successful in forming pair bonds with introduced females. Males did not attempt to rape females either on territories or the communal area and mallard (A. platyrhynchos) and pintail (A. acuta) males courted female black ducks.

Habitat-related variation in movements and fledging success of American black duck broods in northeastern Nova Scotia

1996 ◽  
Vol 74 (6) ◽  
pp. 1158-1164 ◽  
Author(s):  
Norman Seymour ◽  
Winston Jackson
Keyword(s):  
Nova Scotia ◽  
Tidal Marsh ◽  
Freshwater Wetlands ◽  
Fledging Success ◽  
Black Duck ◽  
Brood Movement ◽  
American Black ◽  
American Black Duck ◽  
In Transit ◽  
Three Rivers

Female American black ducks (Anas rubripes) are known to move their broods from low- to high-nutrient rearing sites. We studied the extent of brood movement and fledging success in a northeastern Nova Scotia watershed. Annually, about half the broods moved either overland or along three rivers from small, widely dispersed oligotrophic–mesotrophic wetlands to a large hypertrophic tidal marsh. Mean brood size at fledging was 3.50 in the tidal marsh but 7.05 at the dispersed freshwater wetlands. Females that remained at dispersed sites fledged more ducklings than females that moved to the marsh. Attrition occurred predominantly in the marsh or in transit. Females fledged fewer young when they raised broods at the marsh than when the same females raised broods at inland sites. Females were as successful at nutrient-poor sites as at nutrient-rich sites. The study suggests that concentrating birds in nutrient-rich sites may be counterproductive in terms of female reproductive fitness and population recruitment.

Comparative productivity of American black ducks and mallards nesting on Chesapeake Bay islands

1992 ◽  
Vol 70 (2) ◽  
pp. 225-228 ◽  
Author(s):  
David G. Krementz ◽  
Daniel B. Stotts ◽  
Grey W. Pendleton ◽  
James E. Hines ◽  
Vernon Stotts
Keyword(s):  
Chesapeake Bay ◽  
Clutch Size ◽  
Anas Platyrhynchos ◽  
Nest Success ◽  
Laying Date ◽  
Success Rates ◽  
Anas Rubripes ◽  
Breeding Populations ◽  
American Black ◽  
Bay Islands

We estimated laying dates, clutch sizes, and nest success rates of sympatrically breeding populations of American black ducks (Anas rubripes) and mallards (Anas platyrhynchos) on Chesapeake Bay islands between 1986 and 1989. Neither average laying date nor clutch size differed between black ducks and mallards. Nest success rates were higher for mallards in 2 of 4 years, but were area dependent.

Sign in / Sign up

Export Citation Format

Share Document