USGS - science for a changing world

Northern Prairie Wildlife Research Center

  Home About NPWRC Our Science Staff Employment Contacts Common Questions About the Site

Survival of Radiomarked Canvasback Ducklings in Northwestern Minnesota

Tables


gif -- Survival Curves of Radiomarked Canvasback Ducklings
Figure 1. Survival curves of radiomarked canvasback ducklings at the Agassiz National Wildlife Refuge, 1987-90. Curves labeled with CENSOR indicate survival values when symptomless transmitter failures were treated as censored and curves labeled with DEATH indicate survival values when symptomless transmitter failures were treated as deaths. Sample sizes were as follows: 1987, 10 females, 12 males; 1988, 20 females, 23 males; 1989, 52 females, 44 males; 1990, 33 females, 23 males.

 

gif -- Relation of Canvasback Duckling Mortalities with Weather Patterns
Figure 2. Relation of canvasback duckling mortality with weather patterns at the Agassiz National Wildlife Refuge, 1989. The solid line depicts daily mean temperatures. Shading extends below cloud on days with precipitation. Daily mortality rates of canvasback ducklings are represented by solid bars.

 

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: http://www.npwrc.usgs.gov/resource/birds/radiomrk/figures.htm
Page Contact Information: Webmaster
Page Last Modified: Friday, 01-Feb-2013 19:50:27 EST
Reston, VA [vaww55]