1.4 -, 



1.2 _ 



0.0 _L 



% 



+ . • 



-• »- 



• • 





-//" 





300 400 500 600 700 800 900 1000 1100 1200 



Number of Adults - Spring (Nt) 



Figure 5.17 



Number of fawns per adult female in spring 

 plotted against the number of adults in the 

 population at birth pulse when the cohort was 

 born. Solid line is the actual regression 

 line, the dashed line represents theoretical 

 complete linear density-dependent fawn 

 survival . 



and deer density at birth pulse (r = -0.06, n = 27, Fig. 5.18) 

 or density 1 year prior to birth pulse (r = -0.33, n = 26, 

 Fig. 5.19). 



The 5 data points with highest mortality and lowest 

 density were for 1973-1977, when factors other than forage, 

 density, or deer condition apparently influenced fawn 

 mortality. When those years were excluded, a more general 

 increase of mortality with density was apparent. However, 

 even that relationship depended mostly on data points for the 

 very highest and lowest densities; mortality was extremely 

 variable through the middle range of densities. Other 

 information suggested that data points at both low and high 

 densities were influenced by coincident environmental 

 conditions rather than by deer density. 



152 



