Author : David Lawrence Evans
Publisher :
Page : 76 pages
File Size : 21,69 MB
Release : 1982
Category : Birds of prey
ISBN :
Depletion of fisheries due to acid rain may pose a future threat to bald eagle and osprey populations in some regions. Loss of essential habitat has affected declines in the caracara and western burrowing owl and the disappearance of the norther aplomado falcon from the southern United States. Most populations of the ferruginous hawk, marsh hawk, and prairie falcon appear stable; habitat loss is the most critical factor in population changes.
Author :
Publisher :
Page : 156 pages
File Size : 35,70 MB
Release : 198?
Category :
ISBN :
Author : U.S. Fish and Wildlife Service
Publisher :
Page : 76 pages
File Size : 44,82 MB
Release : 1982
Category : Fishes
ISBN :
Author :
Publisher :
Page : 16 pages
File Size : 43,56 MB
Release : 1949
Category : Fishes
ISBN :
Author :
Publisher :
Page : 340 pages
File Size : 38,71 MB
Release : 1990
Category : Estuarine animals
ISBN :
Author : Jerome H. Stoudt
Publisher :
Page : 40 pages
File Size : 41,98 MB
Release : 1982
Category : Bird populations
ISBN :
A study of canvasback (Aythya valisineria) breeding populations, nest success, productivity, and habitat requirements was conducted from 1961 to 1972 on a 181.3 square kilometer area south of Minnedosa, Manitoba.
Author : Richard D. Atkinson
Publisher :
Page : 28 pages
File Size : 25,90 MB
Release : 1982
Category : Bird populations
ISBN :
Most mourning doves (Zenaida macroura) banded in eastern Missouri in 1968-76 and recovered outside the State moved south-southeast into Kentucky, Tennessee, Mississippi, Alabama, Georgia, Florida, and South Carolina. Most doves banded in central and western Missouri and recovered elsewhere moved south-southwest into Kansas, Oklahoma, Louisiana, Texas, Mexico, and Central America. Several central Missouri doves moved southeast.
Author :
Publisher :
Page : 136 pages
File Size : 33,72 MB
Release : 1982
Category : Bird banding
ISBN :
A banding program for mourning doves (Zenaida macroura) was conducted by the 14 Central Management Unit (CMU) States and the U.S. FIsh and Wildlife Service during 1967-74. Banding and recovery records, as well as data from annual call-count and harvest surveys, were subsequently analyzed by a subcommittee of the Central Migratory Shore and Upland Game Bird Technical Committee. This paper presents information on mourning dove habitat, hunting regulations, and harvest in the CMU; distribution and derviation of band recoveries in and from CMU; distribution of mourning dove harvest in Mexico and Central America; chronology of migration; survival and recovery rates; effects of hunting on CMU mourning dove populations; and indirect nationwide mourning dove population estimates.
Author : G. Vernon Byrd
Publisher : Washington, D.C. : U.S. Department of the Interior, Fish and Wildlife Service
Page : 24 pages
File Size : 17,9 MB
Release : 1983
Category : Birds
ISBN :
Report on a study of the only known breeding population of the endangered Aleutian Canada goose (Brauta canadensis leucopareia) from 1974 to 1977 at Buldir Island, a western Aleutian island, Alaska.
Author : Stephen A. Boyle
Publisher :
Page : 120 pages
File Size : 41,1 MB
Release : 1983
Category : National parks and reserves
ISBN :
Nonconsumptive outdoor recreation has increased greatly in recent years, and there is growing concern about the effects of such activities on wildlife and wildlife habitats. Unfortunately, information concerning these effects is scare and widely scattered. To stimulate research and assist resource planners and managers in utilizing available information, an annotated bibliography of human-wildlife interactions is provided. The report reviews interactions between wildlife and humans participating in nonconsumptive outdoor recreation activities. Also provided are indexes to authors, species, keywords and geographic regions; an annotated list of keywords; and a list of bibliographies on related topics.
