Relationships between social components of breeding duck populations, production and habitat conditions in southern Manitoba / George S. Hochbaum and Leon T. Kummen.
Material type:
TextPublication details: Winnipeg, MB : 1982. Canadian Wildlife Service,Description: 11 p. : ill. ; 28 cmOnline resources: Abstract: During recent years there has been a decline in numbers of breeding waterfowl in southern Manitoba. The drop in numbers has been most pronounced since the drought period of the early 1960's. The depressed numbers have been most noticeable in Mallard and Canvasback and the problem may be regarded as having two attributes: high harvest rates,coupled with declining recruitment. In view of the fact that restrictive harvest frameworks may not increase survival rates, it will be necessary to enhance production to maintain population stability in the future.Declines in recruitment rates may be the result of alteration and loss of nesting habitat due to changes in agricultural practices occurring over the past 25 years. The identification of those components of waterfowl habitat which most strongly influence recruits and the ability to predict production levels will be necessary in order to develop effective habitat management programs. Program objectives 1. To develop the capability to pre
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Electronic Report
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Electronic Library | Non-fiction | HOC (Browse shelf(Opens below)) | Available | 1057 |
During recent years there has been a decline in numbers of breeding waterfowl in southern Manitoba. The drop in numbers has been most pronounced since the drought period of the early 1960's. The depressed numbers have been most noticeable in Mallard and Canvasback and the problem may be regarded as having two attributes: high harvest rates,coupled with declining recruitment. In view of the fact that restrictive harvest frameworks may not increase survival rates, it will be necessary to enhance production to maintain population stability in the future.Declines in recruitment rates may be the result of alteration and loss of nesting habitat due to changes in agricultural practices occurring over the past 25 years. The identification of those components of waterfowl habitat which most strongly influence recruits and the ability to predict production levels will be necessary in order to develop effective habitat management programs. Program objectives 1. To develop the capability to pre