Reliability of Kill and Activity Estimates in the U.S. Waterfowl Hunter Survey


Book Description

A mail questionnaire survey of waterfowl hunters is conducted each year in the United States to provide information on waterfowl kill and hunter activity. We carried out a study using data from the 1971-73 and 1972-73 hunting seasons to determine the effectiveness of the present U.S. sampling and estimation techniques, and a number of modifications in both sampling and analysis is recommended.







Population Ecology of the Mallard


Book Description

Simple experiments and observations reveal the physical properties of light.