Douglas Johnson (Former Employee)
Science and Products
Filter Total Items: 318
[Book review] Estimating the size of animal populations, by J. Gordon Blower, Laurence M. Cook and James A. Bishop [Book review] Estimating the size of animal populations, by J. Gordon Blower, Laurence M. Cook and James A. Bishop
Review of: Estimating the Size of Animal Populations by J. Gordon Blower; Laurence M. Cook; James A. Bishop. George Allen and Unwin Ltd., London, U.K. 1981. 128 pp. $16.95.
Authors
Douglas H. Johnson
[Book review] Population Systems: a General Introduction, by Alan A. Berryman [Book review] Population Systems: a General Introduction, by Alan A. Berryman
Review of: Population Systems: A General Introduction. By Alan A. Berryman. Plenum Press, New York, N.Y. and London, U.K. 1981. xv, 222pp. $16.95 (cloth).
Authors
Douglas H. Johnson
[Book review] The wooing of earth, by Rene Dubos [Book review] The wooing of earth, by Rene Dubos
Review of: The wooing of Earth. René Jules Dubos. Scribner, 1980. University of Michigan. 183 pages. ISBN: 0684165015, 9780684165011.
Authors
Douglas H. Johnson
Variability in nest survival rates and implications to nesting studies Variability in nest survival rates and implications to nesting studies
We used four reasonably large samples (83-213) of Mallard (Anas platyrhynchos) and Blue-winged Teal (A. discors) nests on an interstate highway right-of-way in southcentral North Dakota to evaluate potential biases in hatch-rate estimates. Twelve consecutive, weekly searches for nests were conducted with a cable-chain drag in 1976 and 1977. Nests were revisited at weekly intervals. Four...
Authors
A.T. Klett, Douglas H. Johnson
Forty-fifth breeding bird census - mixed prairie Forty-fifth breeding bird census - mixed prairie
Abstract has not been submitted
Authors
Douglas H. Johnson, C. A. Faanes, J.M. Andrew
Population modeling for furbearer management Population modeling for furbearer management
The management of furbearers has become increasingly complex as greater demands are placed on their populations. Correspondingly, needs for information to use in management have increased. Inadequate information leads the manager to err on the conservative side; unless the size of the 'harvestable surplus' is known, the population cannot be fully exploited. Conversely, information beyond...
Authors
Douglas H. Johnson
Determination of age and whelping dates of live red fox pups Determination of age and whelping dates of live red fox pups
No abstract available.
Authors
Alan B. Sargeant, Stephen H. Allen, Douglas H. Johnson
The use of multivariate statistics in studies of wildlife habitat The use of multivariate statistics in studies of wildlife habitat
No abstract available.
Authors
Douglas H. Johnson
Forty-fourth breeding bird census - Kentucky blue grass prairie and mixed prairie I-V, VIII Forty-fourth breeding bird census - Kentucky blue grass prairie and mixed prairie I-V, VIII
Abstract has not been submitted
Authors
Douglas H. Johnson, J.M. Callow
Improved population estimates through the use of auxiliary information Improved population estimates through the use of auxiliary information
When estimating the size of a population of birds, the investigator may have, in addition to an estimator based on a statistical sample, information on one of several auxiliary variables, such as: (1) estimates of the population made on previous occasions, (2) measures of habitat variables associated with the size of the population, and (3) estimates of the population sizes of other...
Authors
Douglas H. Johnson
Summarizing remarks: estimating relative abundance (Part I) Summarizing remarks: estimating relative abundance (Part I)
No abstract available.
Authors
Douglas H. Johnson
The comparison of usage and availability measurements for evaluating resource preference The comparison of usage and availability measurements for evaluating resource preference
Modern ecological research often involves the comparison of the usage of habitat types or food items to the availability of those resources to the animal. Widely used methods of determining preference from measurements of usage and availability depend critically on the array of components that the researcher, often with a degree of arbitrariness, deems available to the animal. This paper...
Authors
Douglas H. Johnson
Science and Products
Filter Total Items: 318
[Book review] Estimating the size of animal populations, by J. Gordon Blower, Laurence M. Cook and James A. Bishop [Book review] Estimating the size of animal populations, by J. Gordon Blower, Laurence M. Cook and James A. Bishop
Review of: Estimating the Size of Animal Populations by J. Gordon Blower; Laurence M. Cook; James A. Bishop. George Allen and Unwin Ltd., London, U.K. 1981. 128 pp. $16.95.
Authors
Douglas H. Johnson
[Book review] Population Systems: a General Introduction, by Alan A. Berryman [Book review] Population Systems: a General Introduction, by Alan A. Berryman
Review of: Population Systems: A General Introduction. By Alan A. Berryman. Plenum Press, New York, N.Y. and London, U.K. 1981. xv, 222pp. $16.95 (cloth).
Authors
Douglas H. Johnson
[Book review] The wooing of earth, by Rene Dubos [Book review] The wooing of earth, by Rene Dubos
Review of: The wooing of Earth. René Jules Dubos. Scribner, 1980. University of Michigan. 183 pages. ISBN: 0684165015, 9780684165011.
Authors
Douglas H. Johnson
Variability in nest survival rates and implications to nesting studies Variability in nest survival rates and implications to nesting studies
We used four reasonably large samples (83-213) of Mallard (Anas platyrhynchos) and Blue-winged Teal (A. discors) nests on an interstate highway right-of-way in southcentral North Dakota to evaluate potential biases in hatch-rate estimates. Twelve consecutive, weekly searches for nests were conducted with a cable-chain drag in 1976 and 1977. Nests were revisited at weekly intervals. Four...
Authors
A.T. Klett, Douglas H. Johnson
Forty-fifth breeding bird census - mixed prairie Forty-fifth breeding bird census - mixed prairie
Abstract has not been submitted
Authors
Douglas H. Johnson, C. A. Faanes, J.M. Andrew
Population modeling for furbearer management Population modeling for furbearer management
The management of furbearers has become increasingly complex as greater demands are placed on their populations. Correspondingly, needs for information to use in management have increased. Inadequate information leads the manager to err on the conservative side; unless the size of the 'harvestable surplus' is known, the population cannot be fully exploited. Conversely, information beyond...
Authors
Douglas H. Johnson
Determination of age and whelping dates of live red fox pups Determination of age and whelping dates of live red fox pups
No abstract available.
Authors
Alan B. Sargeant, Stephen H. Allen, Douglas H. Johnson
The use of multivariate statistics in studies of wildlife habitat The use of multivariate statistics in studies of wildlife habitat
No abstract available.
Authors
Douglas H. Johnson
Forty-fourth breeding bird census - Kentucky blue grass prairie and mixed prairie I-V, VIII Forty-fourth breeding bird census - Kentucky blue grass prairie and mixed prairie I-V, VIII
Abstract has not been submitted
Authors
Douglas H. Johnson, J.M. Callow
Improved population estimates through the use of auxiliary information Improved population estimates through the use of auxiliary information
When estimating the size of a population of birds, the investigator may have, in addition to an estimator based on a statistical sample, information on one of several auxiliary variables, such as: (1) estimates of the population made on previous occasions, (2) measures of habitat variables associated with the size of the population, and (3) estimates of the population sizes of other...
Authors
Douglas H. Johnson
Summarizing remarks: estimating relative abundance (Part I) Summarizing remarks: estimating relative abundance (Part I)
No abstract available.
Authors
Douglas H. Johnson
The comparison of usage and availability measurements for evaluating resource preference The comparison of usage and availability measurements for evaluating resource preference
Modern ecological research often involves the comparison of the usage of habitat types or food items to the availability of those resources to the animal. Widely used methods of determining preference from measurements of usage and availability depend critically on the array of components that the researcher, often with a degree of arbitrariness, deems available to the animal. This paper...
Authors
Douglas H. Johnson