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Thumbnail Icon [Personnel: Last_Name='JOHNSON', Middle_Name='H.', First_Name='DOUGLAS']

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4 Titles Match Your Query
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1. The comparison of usage and availability measurements for evaluating resource preference (PREFER) [NPWRC_PREFER]
The program PREFER performs calculations described in Johnson (1980) to determine the preference of J individuals for I components (for example, habitat types or kinds of foods) using availability ...

2. Importance of Individual Species of Predators on Nesting Success of Ducks in the Canadian Prairie Pothole Region [usgs_npwrc_nestingsuccess]
We followed 3094 upland nests of several species of ducks. Clutches in most nests were lost to predation. We related daily nest predation rates to indices of activity of eight egg-eating predators, ...

3. Incidental Catch of Marine Birds in the North Pacific High Seas Driftnet Fisheries in 1990. [usgs_npwrc_incidentalmarinecatc]
The incidental take of marine birds was estimated for the following North Pacific driftnet fisheries in 1990: Japanese squid, Japanese large-mesh, Korean squid, and Taiwanese squid and large-mesh ...

4. The Mallard Model [usgsbrdnpwrcd0000005]
Waterfowl managers face many difficult decisions about how to manage a particular area to maximize productivity of mallards (Anas platyrhynchos) and other upland nesting waterfowl. The Mallard Model ...

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