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Author : Anonim
Publisher : Unknown
Page : 288 pages
File Size : 55,5 Mb
Release : 1949
Category : Waterfowl
ISBN : UOM:39015077585365
Author : Anonim
Publisher : Unknown
Page : 362 pages
File Size : 53,8 Mb
Release : 1952
Category : Waterfowl
ISBN : UOM:39015077585399
Author : Anonim
Publisher : Unknown
Page : 296 pages
File Size : 54,9 Mb
Release : 1972
Category : Animal ecology
ISBN : OSU:32435003108867
Author : Anonim
Publisher : Unknown
Page : 1062 pages
File Size : 46,7 Mb
Release : 1972
Category : Fishing
ISBN : WISC:89038480463
Author : Anonim
Publisher : Unknown
Page : 120 pages
File Size : 53,5 Mb
Release : 1956
Category : Wildlife conservation
ISBN : UOM:39015001470015
Author : Richard S. Pospahala,David Raymond Anderson,Charles J. Henny
Publisher : Unknown
Page : 84 pages
File Size : 54,7 Mb
Release : 1974
Category : Birds
ISBN : UCR:31210024953679
Author : Anonim
Publisher : Unknown
Page : 744 pages
File Size : 45,6 Mb
Release : 1972
Category : Wildlife conservation
ISBN : UOM:39015001248684
Author : Anonim
Publisher : Unknown
Page : 228 pages
File Size : 43,8 Mb
Release : 2024-07-01
Category : Waterfowl
ISBN : UOM:39015056611422
Author : Richard S. Pospahala
Publisher : Forgotten Books
Page : 86 pages
File Size : 42,9 Mb
Release : 2018-03-31
Category : Business & Economics
ISBN : 036571366X
Excerpt from Population Ecology of the Mallard, Vol. 2: Breeding Habitat Conditions, Size of the Breeding Populations, and Production Indices Climatic conditions have a considerable effect on the quality and quantity of waterfowl breed ing habitat which in turn influence waterfowl production and the distribution of birds on the breeding grounds. The effects of man's activities on waterfowl habitat, primarily through drain age, are also reviewed. The numbers of ponds are discussed in terms of climatic factors such as precipitation and temperature. Furthermore, annual numbers of May and July ponds in the prairie-parkland Area (southern portions of Alberta, Saskatchewan, and Manitoba) are dis cussed with respect to climatic conditions. Pi nally, relationships between breeding population density and indices to production are examined. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author : Anonim
Publisher : Unknown
Page : 314 pages
File Size : 51,6 Mb
Release : 1994
Category : Waterfowl
ISBN : UCSD:31822009180332
Author : F. A. Johnson
Publisher : Unknown
Page : 10 pages
File Size : 55,9 Mb
Release : 1990
Category : Bird populations
ISBN : MINN:31951D012217509
Author : Aleksandr Nikolaevich Formozov,I︠U︡. A. Isakov
Publisher : Unknown
Page : 280 pages
File Size : 43,8 Mb
Release : 1969
Category : Animal populations
ISBN : MINN:31951D01790560E
Author : Charles D. Evans,Arthur S. Hawkins,William H. Marshall
Publisher : Unknown
Page : 74 pages
File Size : 44,9 Mb
Release : 1952
Category : Bird populations
ISBN : UOM:39015077581281
Author : Anonim
Publisher : Unknown
Page : 656 pages
File Size : 55,9 Mb
Release : 1949
Category : Wildlife conservation
ISBN : UOM:39015001481475
Author : U.S. Fish and Wildlife Service
Publisher : Unknown
Page : 250 pages
File Size : 44,7 Mb
Release : 1948
Category : Fisheries
ISBN : CORNELL:31924055153401
