Waterfowl Status Report, 1975 ; Waterfowl Status Report, 1976

Waterfowl Status Report, 1975 ; Waterfowl Status Report, 1976
Author: James R. Goldsberry
Publisher:
Total Pages: 344
Release: 1980
Genre: Bird populations
ISBN:

This report contains information obtained from the 1974-75 midwinter waterfowl survey, the 1975 waterfowl breeding population and production surveys, and the waterfowl harvest surveys for the 1974-75 hunting season.

Waterfowl Status Report, 1976

Waterfowl Status Report, 1976
Author: William W. Larned
Publisher:
Total Pages: 88
Release: 1980
Genre: Bird populations
ISBN:

This report contains information obtained from the 1975-76 midwinter waterfowl survey, the 1976 waterfowl breeding population and production surveys, and the waterfowl harvest surveys for the 1975-76 hunting season.

Waterfowl Status Report, 1977

Waterfowl Status Report, 1977
Author: Carney S. Smith
Publisher:
Total Pages: 88
Release: 1981
Genre: Bird populations
ISBN:

This report contains information obtained from the 1976-77 midwinter waterfowl survey, the 1977 waterfowl breeding population and production surveys, and the waterfowl harvest surveys for the 1976-77 hunting season.

Technique for Structuring Wildlife Guilds to Evaluate Impacts on Wildlife Communities

Technique for Structuring Wildlife Guilds to Evaluate Impacts on Wildlife Communities
Author: Henry L. Short
Publisher:
Total Pages: 40
Release: 1982
Genre: Biotic communities
ISBN:

This paper describes a technique for ordering wildlife information according to physical strata and vegetative structure so that a variety of statistical analyses can be accomplished. Individual wildlife species are assigned to cells in a species-habitat matrix on the basis of feeding and breeding activities within physical strata in representative types of vegetative cover: the cells within the species-habitat matrix are assigned numeric values. The statistical analyses are thus based on the areas that individual species occupy within the species-habitat matrix. Computer graphics are used to represent the structure of wildlife communities and cluster analysis routines are used to describe the potential wildlife guilds that may exist in different vegetative communities. Different numbers of wildlife guilds will occur in species and presumably also of wildlife guilds present within a type of cover is modified by physical attributes of the vegetation within that cover type. The products of this analytical technique may be suitable for evaluating habitat quality, impact assessments, regional inventories and assessments of wildlife resources, and land-use planning activities.

Organochlorine Residues in Eggs of Alaskan Seabirds

Organochlorine Residues in Eggs of Alaskan Seabirds
Author:
Publisher:
Total Pages: 48
Release: 1982
Genre: Birds
ISBN:

One egg from each of 440 clutches of eggs of 19 species of Alaskan seabirds collected in 1973-76 was analyzed for organochlorine residues. Both frequency of occurrence and concentration of residues in the eggs differed geographically and by species, apparently reflecting non-uniform distribution of organochlorines in the environment, dissimilar feeding habits and migration patterns of the species, or metabolic differences among the species.