Douglas Johnson (Former Employee)
Science and Products
Filter Total Items: 318
A model of the productivity of the mallard duck A model of the productivity of the mallard duck
This paper describes a stochastic computer model that simulates recruitment of the mallard (Anas platyrhynchos) under different habitat conditions and management scenarios. The model incorporates several environmental phenomena and biological relations that affect mallard recruitment. Major events include arrival of mallards in the spring, daily survival of hens, initiation of nests...
Authors
Douglas H. Johnson, Donald W. Sparling, Lewis M. Cowardin
Are mallards declining in North America? Are mallards declining in North America?
No abstract available.
Authors
Douglas H. Johnson, T.L. Shaffer
[Book review] Statistics in ornithology, edited by B. J. T. Morgan and P. M. North [Book review] Statistics in ornithology, edited by B. J. T. Morgan and P. M. North
Review of: Statistics in Ornithology. B. J. T. Morgan and P. M. North (eds.). Berlin: Springer-Verlag, 1985. xxv + 418 pp. $29.60 (paperback).
Authors
Douglas H. Johnson
[Book review] The encyclopedia of birds, by Christopher M. Perrins and Alex L. A. Middleton [Book review] The encyclopedia of birds, by Christopher M. Perrins and Alex L. A. Middleton
Review of: The Encyclopedia of birds. Perrins, Christopher M.; Middleton, Alex L.A. New York, Facts on File, 1985. 463 p., illus. ISBN: 0-8160-1150-8.
Authors
Douglas H. Johnson
Evaluation of a mallard productivity model Evaluation of a mallard productivity model
A stochastic model of mallard (Anas platyrhynchos) productivity has been developed over a 10-year period and successfully applied to several management questions. Here we review the model and describe some recent uses and improvements that increase its realism and applicability, including naturally occurring changes in wetland habitat, catastrophic weather events, and the migrational...
Authors
Douglas H. Johnson, L.M. Cowardin, D. W. Sparling
Empirical Bayes estimates of duck population Empirical Bayes estimates of duck population
No abstract available.
Authors
Douglas H. Johnson
Science and Products
Filter Total Items: 318
A model of the productivity of the mallard duck A model of the productivity of the mallard duck
This paper describes a stochastic computer model that simulates recruitment of the mallard (Anas platyrhynchos) under different habitat conditions and management scenarios. The model incorporates several environmental phenomena and biological relations that affect mallard recruitment. Major events include arrival of mallards in the spring, daily survival of hens, initiation of nests...
Authors
Douglas H. Johnson, Donald W. Sparling, Lewis M. Cowardin
Are mallards declining in North America? Are mallards declining in North America?
No abstract available.
Authors
Douglas H. Johnson, T.L. Shaffer
[Book review] Statistics in ornithology, edited by B. J. T. Morgan and P. M. North [Book review] Statistics in ornithology, edited by B. J. T. Morgan and P. M. North
Review of: Statistics in Ornithology. B. J. T. Morgan and P. M. North (eds.). Berlin: Springer-Verlag, 1985. xxv + 418 pp. $29.60 (paperback).
Authors
Douglas H. Johnson
[Book review] The encyclopedia of birds, by Christopher M. Perrins and Alex L. A. Middleton [Book review] The encyclopedia of birds, by Christopher M. Perrins and Alex L. A. Middleton
Review of: The Encyclopedia of birds. Perrins, Christopher M.; Middleton, Alex L.A. New York, Facts on File, 1985. 463 p., illus. ISBN: 0-8160-1150-8.
Authors
Douglas H. Johnson
Evaluation of a mallard productivity model Evaluation of a mallard productivity model
A stochastic model of mallard (Anas platyrhynchos) productivity has been developed over a 10-year period and successfully applied to several management questions. Here we review the model and describe some recent uses and improvements that increase its realism and applicability, including naturally occurring changes in wetland habitat, catastrophic weather events, and the migrational...
Authors
Douglas H. Johnson, L.M. Cowardin, D. W. Sparling
Empirical Bayes estimates of duck population Empirical Bayes estimates of duck population
No abstract available.
Authors
Douglas H. Johnson