scholarly journals Wintering American Black Duck Ecology of Central Appalachia

2018 ◽  
Author(s):  
Sara E Yannuzzi
Keyword(s):  
Black Duck ◽  
Central Appalachia ◽  
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

Behavioral and Ecological Factors Contributing to American Black Duck-Mallard Hybridization

1984 ◽  
Vol 48 (3) ◽  
pp. 846 ◽  
Author(s):  
Lynn M. Brodsky ◽  
Patrick J. Weatherhead
Keyword(s):  
Ecological Factors ◽  
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

True metabolizable energy of American black duck foods

2015 ◽  
Vol 79 (2) ◽  
pp. 344-348 ◽  
Author(s):  
John M. Coluccy ◽  
Michael V. Castelli ◽  
Paul M. Castelli ◽  
John W. Simpson ◽  
Scott R. Mcwilliams ◽  
...  
Keyword(s):  
Metabolizable Energy ◽  
Black Duck ◽  
American Black ◽  
American Black Duck

Models of Production Rates in American Black Duck Populations

2006 ◽  
Vol 70 (4) ◽  
pp. 947-954 ◽  
Author(s):  
NATHAN L. ZIMPFER ◽  
MICHAEL J. CONROY
Keyword(s):  
Production Rates ◽  
Black Duck ◽  
American Black ◽  
American Black Duck

Effects of the blood parasite Leucocytozoon simondi on growth rates of anatid ducklings

1999 ◽  
Vol 77 (10) ◽  
pp. 1573-1578 ◽  
Author(s):  
Dave Shutler ◽  
C Davison Ankney ◽  
Adele Mullie
Keyword(s):  
Growth Rates ◽  
Slow Growth ◽  
Principal Component ◽  
Blood Parasite ◽  
Wild Stock ◽  
Wild Duck ◽  
Black Duck ◽  
Size Growth ◽  
American Black ◽  
American Black Duck

The blood parasite Leucocytozoon simondi is often associated with heavy mortality of ducks and geese, especially domestic ones, in North America. In contrast, in a previous study we found no mortality from L. simondi in our wild stock of mallard (Anas platyrhynchos) and American black duck (Anas rubripes) ducklings. However, because parasites can slow growth, which could extend the interval during which ducklings are susceptible to predators, we tested for parasite effects on growth rates. We analysed growth rates over the first 20 days of life, based on tarsus length, culmen, bill width, body mass, and a principal component of structural size. Growth rates of infected ducklings were not lower than those of uninfected ducklings. Similarly, more intense infections did not have a greater effect on growth rates. Hence, growth rates were not negatively affected by L. simondi, which suggests that effects of this parasite on wild duck populations have been overestimated.

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.

American Black Duck and Mallard Breeding Distribution and Habitat Relationships along a Forest–Agriculture Gradient in Southern Québec

2006 ◽  
Vol 70 (2) ◽  
pp. 450-459 ◽  
Author(s):  
CHARLES MAISONNEUVE ◽  
LUC BÉLANGER ◽  
DANIEL BORDAGE ◽  
BENOÎT JOBIN ◽  
MARCELLE GRENIER ◽  
...  
Keyword(s):  
Black Duck ◽  
Breeding Distribution ◽  
American Black ◽  
American Black Duck

The American Black Duck: Three Decades of Science-Based Adaptive Management

2018 ◽  
Vol 2 (1) ◽  
pp. 1-8
Author(s):  
Kevin M. Ringelman ◽  
Christopher K. Williams
Keyword(s):  
Salt Marshes ◽  
Seasonal Effects ◽  
Eastern United States ◽  
Coastal Salt Marshes ◽  
Black Duck ◽  
Breeding Grounds ◽  
American Black ◽  
Hunting Regulations ◽  
American Black Duck

The American black duck (Anas rubripes) population declined by 50% between 1955 and 1985, prompting more than three decades of intensive scientific research and strategic management. Analyses of band recovery data suggest that the historical declines may have been caused in part by harvest, but even with restrictive hunting regulations implemented in the mid 1980s, populations have not recovered. Increasing competition and hybridization with mallards (Anas platyrhynchos), coupled with habitat loss and fragmentation on northern breeding grounds are hypothesized to have contributed to a lower continental black duck population. Simultaneously, there is a concern that declines in the quantity and quality of wintering habitat—coastal salt marshes of the eastern United States—may have deleterious cross-seasonal effects on black duck demographics. Black ducks have a long legacy of intensive research and management, and ongoing threats to their populations make this a well-rooted and timely case study in science-based conservation.

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