Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Joshua J. Traylor"'
Publikováno v:
The Journal of Wildlife Management. 76:1135-1144
Large increases in several populations of North American arctic geese have resulted in ecosystem-level effects from associated herbivory. Consequently, some breeding populations have shown density dependence in recruitment through declines in food av
Autor:
Daizaburo Shizuka, Katherine R. Mehl, Bruce E. Lyon, Wendy L. Reed, Courtney L. Amundson, Joshua J. Traylor, Todd W. Arnold, Jeffrey T. Pelayo
Publikováno v:
Waterbirds. 34:312-318
Individualized markers that allow organisms to be identified without recapture are invaluable for studies of survival, movement, and behavior. Nape tags consisting of brass safety pins with unique combinations of two or three colored plastic beads we
Publikováno v:
Behavioral Ecology and Sociobiology. 62:1085-1097
Young waterfowl can frequently join foster females shortly after hatch, resulting in post-hatch brood amalgamation. Much uncertainty remains about physiological or ecological factors that motivate adoption including potential costs and benefits to fo
Autor:
C. Swoboda, Katherine R. Mehl, Ray T. Alisauskas, Mark Wayland, Joshua J. Traylor, E. Neugebauer, Dana K. Kellett
Publikováno v:
Environmental Pollution. 150:329-337
Sea duck populations have declined in North America. Contaminants, especially metals, have been listed as possible contributing factors. Sea ducks are long-lived. Thus, individuals chronically exposed to elevated metal levels may be at greatest risk.
Autor:
Joshua J. Traylor, Ray T. Alisauskas
Publikováno v:
The Auk. 123:67-81
In waterfowl, offspring survival and the effects of extrinsic (i.e. weather, hatching date) and intrinsic (i.e. physical and nutritional traits of individual females and ducklings, brood sizes) factors on it are poorly understood. In 2000 and 2001, w
Autor:
Dana K. Kellett, Ray T. Alisauskas, Katherine R. Mehl, Kiel L. Drake, Joshua J. Traylor, Shona L. Lawson
Publikováno v:
The Auk. 122:313-318
We investigated body-mass dynamics during incubation of Long-tailed Ducks (Clangula hyemalis) nesting in Canada’s central Arctic, 1998–2003. Long-tailed Duck females (n = 37) lost 7% of pre-incubation body mass during incubation; on average, fema
Publikováno v:
The Auk. 121:950-962
Population surveys indicate a trend of declining abundance of scoters (Melanitta spp.) in North America. Little is known about changes in life-history traits that may be responsible for the recent population decline of White-winged Scoters (Melanitta
Autor:
Dana K. Kellett, Cindy Swoboda, Joshua J. Traylor, Kiel L. Drake, Mark Wayland, Ray T. Alisauskas, Katherine R. Mehl
Publikováno v:
Environmental toxicology and chemistry. 27(3)
Populations of several species of North American sea ducks have declined in the past few decades. Exposure to environmental contaminants, particularly metals, has been proposed as one of many possible factors contributing to these declines. Populatio
Publikováno v:
The Journal of Wildlife Management. 76:1731-1731
Autor:
Wayland M; Environment Canada, Saskatoon, Saskatchewan, Canada. mark.wayland@ec.gc.ca, Drake KL, Alisauskas RT, Kellett DK, Traylor J, Swoboda C, Mehl K
Publikováno v:
Environmental toxicology and chemistry [Environ Toxicol Chem] 2008 Mar; Vol. 27 (3), pp. 698-704.