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Breeding-season survival of mallard females in the Prairie Pothole Region of Canada / James H. Devries, John J. Citta, Mark S. Lindberg, David W. Howerter, and Michael G. Anderson.

By: Contributor(s): Material type: TextTextSeries: Journal of Wildlife Management. 67(3) 551-563 Publication details: 2003.Description: illustrations ; 28 cmLOC classification:
  • DEV
Online resources: Summary: As part of the PrairieH abitatJ oint Venture (PHJV)H abitatA ssessmentP roject,w e radiomarkeda nd trackedd aily2 ,249 female mallardd ucks (Anasp latyrhynchoins) the PrairieP othole Region (PPR)o f Canada.W e conductedo ur studya t 19 different5 4- to 78-km2s ites for 1 yearp er site from 1993t o 1998.W e estimatedf emale survivapl robabilityd uringt he 90-dayp eriodf ollowinga rrivaol n the breedinga reaa nd employedi nformation-theoretica pproachest o select among competingm odels thatd escribedf actorsa ffectings urvivapl robabilityW. ei nvestigated the relationship between female survival and 3 periods of the nesting season, female age (yearling vs. older), uplandh abitatt reatmentsl,o ngitude,a nd habitatv ariablesO. ur model estimateso f female survivapl robability ranged between 0.62 (SE = 0.028) and 0.84 (SE = 0.018) and averaged 0.76 (SE = 0.004) for the 90-day period. The best approximatingm odel indicatedt hat female survivawl as (1) lowestw hen most femalesw ere nesting, and (2) depended on longitudea nd percentw etlandh abitats uch thats urvivawl asl owesta t westerns itesw ith low wetland densities. Management efforts to reduce wetland loss, especially in western regions of the Canadian PPR, may positivelyi nfluence female survivalU. pland habitatr estorationsd esigned to improven est survivalm ay not have a concurrenti mpacto n female survivaul nless a significantp ortiono f the nestingp opulationi s affected.

Includes bibliographical references (pages 561-563).

As part of the PrairieH abitatJ oint Venture (PHJV)H abitatA ssessmentP roject,w e radiomarkeda nd
trackedd aily2 ,249 female mallardd ucks (Anasp latyrhynchoins) the PrairieP othole Region (PPR)o f Canada.W e
conductedo ur studya t 19 different5 4- to 78-km2s ites for 1 yearp er site from 1993t o 1998.W e estimatedf emale
survivapl robabilityd uringt he 90-dayp eriodf ollowinga rrivaol n the breedinga reaa nd employedi nformation-theoretica
pproachest o select among competingm odels thatd escribedf actorsa ffectings urvivapl robabilityW. ei nvestigated
the relationship between female survival and 3 periods of the nesting season, female age (yearling vs.
older), uplandh abitatt reatmentsl,o ngitude,a nd habitatv ariablesO. ur model estimateso f female survivapl robability
ranged between 0.62 (SE = 0.028) and 0.84 (SE = 0.018) and averaged 0.76 (SE = 0.004) for the 90-day period.
The best approximatingm odel indicatedt hat female survivawl as (1) lowestw hen most femalesw ere nesting,
and (2) depended on longitudea nd percentw etlandh abitats uch thats urvivawl asl owesta t westerns itesw ith low
wetland densities. Management efforts to reduce wetland loss, especially in western regions of the Canadian PPR,
may positivelyi nfluence female survivalU. pland habitatr estorationsd esigned to improven est survivalm ay not
have a concurrenti mpacto n female survivaul nless a significantp ortiono f the nestingp opulationi s affected.

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