Models of production rates in American black duck populations
Article Abstract:
Predictive models of American black duck (Anas rubripes) production rates were developed as a function of biotic (black duck and mallard [A. platrhynchos] abundance) and abiotic factors (spring precipitation and temperature) across predefined breeding areas, from 1990 to 2001. Information criteria suggested that a model containing predictors for density-dependence, competition with mallards, spring precipitation, and temperature and stratum-specific coefficients was the best model of black duck production rates.
Publication Name: The Journal of Wildlife Management
Subject: Zoology and wildlife conservation
ISSN: 0022-541X
Year: 2006
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Winter movement dynamics of Black Brant
Article Abstract:
Study of winter movements of Black Brants in Mexico and southern California, USA, revealed that movement probabilities were negatively related to distance between winter sites, both within winters and between winters. Southward movement exhibited between winters was influenced by variation in habitat quality and a northward movement exhibited by them between months in winter was related to migration patterns.
Publication Name: The Journal of Wildlife Management
Subject: Zoology and wildlife conservation
ISSN: 0022-541X
Year: 2007
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