Charles J. Henny (Former Employee)
Science and Products
If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.
If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.
Filter Total Items: 213
An analysis of the population dynamics of selected avian species, with special reference to changes during the modern pesticide era An analysis of the population dynamics of selected avian species, with special reference to changes during the modern pesticide era
No abstract available.
Authors
Charles J. Henny
Population ecology of the mallard: I. A review of previous studies and the distribution and migration from breeding areas Population ecology of the mallard: I. A review of previous studies and the distribution and migration from breeding areas
This report, the first of a series of reports on a comprehensive analysis of population data on the? millIard at? the continental level, provides background information including a review of the history of waterfowl management and a resume of previous studies of the mallard. The breeding range of the mallard was subdivided into 16 major and 44 minor reference areas. Each area is...
Authors
David R. Anderson, Charles J. Henny
Aerial surveys of waterfowl production in North America, 1955-71 Aerial surveys of waterfowl production in North America, 1955-71
No abstract available.
Authors
Charles J. Henny, David R. Anderson, Richard S. Pospahala
Population ecology and environmental pollution: Red-tailed and Cooper's hawks Population ecology and environmental pollution: Red-tailed and Cooper's hawks
No abstract available.
Authors
Charles J. Henny, H. M. Wight
Population ecology of the great blue heron with special reference to western Oregon Population ecology of the great blue heron with special reference to western Oregon
Great Blue Heron (Ardea herodias) begin nesting in western Oregon about 1 month earlier than reported from the Philadelphia region and about 2 months earlier than reported from Southern Alberta. The number of young fledged per nesting pair in Oregon was 2.04 in 1970 which was nearly identical to the 1.91 believed necessary to maintain a stable population in the northern United States...
Authors
Charles J. Henny, M.R. Bethers
Hawk migration over White Marsh, Maryland Hawk migration over White Marsh, Maryland
The average number of hawks observed per hour in autumn migration between 1951-1954 and 1958-1961 at White Marsh, Maryland, was compared. The counts indicated that the status of the ten species observed may be divided into three categories: (1) relatively stable species (red-tailed hawk), (2) declining species (sparrow hawk, red-shouldered hawk, osprey, marsh hawk, and broad-winged hawk)...
Authors
C.D. Hackman, Charles J. Henny
Determining parameters for populations by using structural models Determining parameters for populations by using structural models
A method for calculating parameters necessary to maintain stable populations is described and the management implications of the method are discussed. This method depends upon knowledge of the population mortality rate schedule, the age at which the species reaches maturity, and recruitment rates or age ratios in the population. Four approaches are presented which yield information about...
Authors
Charles J. Henny, W.S. Overton, H. M. Wight
Retention of extra-wide, lock-on, and regular bands on waterfowl Retention of extra-wide, lock-on, and regular bands on waterfowl
In tests of three types of bands -- extra-wide bands, lock-on bands, and regular U.S. Fish and Wildlife Service bands -- little difference was noted in the retention qualities of the three types on waterfowl. Therefore, there appeared to be no advantage in using either the extra-wide or the lock-on type of band rather than the regular band now in use by waterfowl banders on this...
Authors
R. K. Martinson, Charles J. Henny
Retention of extra-wide, lock-on, and regular bands on waterfowl Retention of extra-wide, lock-on, and regular bands on waterfowl
No abstract available.
Authors
R. Kahler Martinson, Charles J. Henny
Non-USGS Publications**
Henny, C.J., Wight, H.M., 1969, An endangered osprey population- Estimates of mortality and production: Auk, v. 86, p. 188-198.
Henny, C.J., 1969, Geographical variation in mortality rates and production requirements of the Barn Owl (Tyto alba ssp.): Bird-Banding, v. 40, no. 4, p. 277-290.
Chapman, J.A., Henny, C.J., Wight, H.M., 1969, The status, population dynamics, and harvest of the dusky Canada goose: Wildlife Monographs, no. 18, p. 1-48.
Chapman, J.A., Henny, C.J., 1968, Records of surf scoters found inland in Oregon: Murrelet, v. 49, no. 1, p. 11.
Henny, C.J., 1967, Estimating band-reporting rates from banding and crippling loss data: Journal of Wildlife Management, v. 31, no. 3, p. 533-538.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.
If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.
Filter Total Items: 213
An analysis of the population dynamics of selected avian species, with special reference to changes during the modern pesticide era An analysis of the population dynamics of selected avian species, with special reference to changes during the modern pesticide era
No abstract available.
Authors
Charles J. Henny
Population ecology of the mallard: I. A review of previous studies and the distribution and migration from breeding areas Population ecology of the mallard: I. A review of previous studies and the distribution and migration from breeding areas
This report, the first of a series of reports on a comprehensive analysis of population data on the? millIard at? the continental level, provides background information including a review of the history of waterfowl management and a resume of previous studies of the mallard. The breeding range of the mallard was subdivided into 16 major and 44 minor reference areas. Each area is...
Authors
David R. Anderson, Charles J. Henny
Aerial surveys of waterfowl production in North America, 1955-71 Aerial surveys of waterfowl production in North America, 1955-71
No abstract available.
Authors
Charles J. Henny, David R. Anderson, Richard S. Pospahala
Population ecology and environmental pollution: Red-tailed and Cooper's hawks Population ecology and environmental pollution: Red-tailed and Cooper's hawks
No abstract available.
Authors
Charles J. Henny, H. M. Wight
Population ecology of the great blue heron with special reference to western Oregon Population ecology of the great blue heron with special reference to western Oregon
Great Blue Heron (Ardea herodias) begin nesting in western Oregon about 1 month earlier than reported from the Philadelphia region and about 2 months earlier than reported from Southern Alberta. The number of young fledged per nesting pair in Oregon was 2.04 in 1970 which was nearly identical to the 1.91 believed necessary to maintain a stable population in the northern United States...
Authors
Charles J. Henny, M.R. Bethers
Hawk migration over White Marsh, Maryland Hawk migration over White Marsh, Maryland
The average number of hawks observed per hour in autumn migration between 1951-1954 and 1958-1961 at White Marsh, Maryland, was compared. The counts indicated that the status of the ten species observed may be divided into three categories: (1) relatively stable species (red-tailed hawk), (2) declining species (sparrow hawk, red-shouldered hawk, osprey, marsh hawk, and broad-winged hawk)...
Authors
C.D. Hackman, Charles J. Henny
Determining parameters for populations by using structural models Determining parameters for populations by using structural models
A method for calculating parameters necessary to maintain stable populations is described and the management implications of the method are discussed. This method depends upon knowledge of the population mortality rate schedule, the age at which the species reaches maturity, and recruitment rates or age ratios in the population. Four approaches are presented which yield information about...
Authors
Charles J. Henny, W.S. Overton, H. M. Wight
Retention of extra-wide, lock-on, and regular bands on waterfowl Retention of extra-wide, lock-on, and regular bands on waterfowl
In tests of three types of bands -- extra-wide bands, lock-on bands, and regular U.S. Fish and Wildlife Service bands -- little difference was noted in the retention qualities of the three types on waterfowl. Therefore, there appeared to be no advantage in using either the extra-wide or the lock-on type of band rather than the regular band now in use by waterfowl banders on this...
Authors
R. K. Martinson, Charles J. Henny
Retention of extra-wide, lock-on, and regular bands on waterfowl Retention of extra-wide, lock-on, and regular bands on waterfowl
No abstract available.
Authors
R. Kahler Martinson, Charles J. Henny
Non-USGS Publications**
Henny, C.J., Wight, H.M., 1969, An endangered osprey population- Estimates of mortality and production: Auk, v. 86, p. 188-198.
Henny, C.J., 1969, Geographical variation in mortality rates and production requirements of the Barn Owl (Tyto alba ssp.): Bird-Banding, v. 40, no. 4, p. 277-290.
Chapman, J.A., Henny, C.J., Wight, H.M., 1969, The status, population dynamics, and harvest of the dusky Canada goose: Wildlife Monographs, no. 18, p. 1-48.
Chapman, J.A., Henny, C.J., 1968, Records of surf scoters found inland in Oregon: Murrelet, v. 49, no. 1, p. 11.
Henny, C.J., 1967, Estimating band-reporting rates from banding and crippling loss data: Journal of Wildlife Management, v. 31, no. 3, p. 533-538.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.