Vol. 20, No. 12 
Page 3 
squirrels in 1974 were also well below norma 
squirrel harvest the next fall. 
in central Illinois and so was the 
act abundant 1°°* the * eat the 
and hickories insert supp, 
^ £S£ 2a s s ^ St El*i£ie_C h ?„ ckens^ to .Habitat Manipulation 
l. westemeier, 
D. R, Vance 
ecology anddsxaminhig “P' vlr I ^rTu! ^Hi J 1“ °" p . ra]r,e chicken nest 
analyses. All data delating Jo annual nesHnn li^ f° r lnclusion computer 
populations, and nest densities nf m-h • 9 ^ ort > nest success, mammal 
Si^le linear correlatSl ^iSi^ent, 5*" T ” lzed * 
annual abundance of prairie chicken mrU c ^lcu ated for each variable with 
Many correlation co.?f™c^ ™ui g n^L ^t 9 ^ 5 the 5 e ri "9- 
subsequent populations were significant ThnL ff d neSt Success to 
positively correlated with annual abundan ^ r vanab, f s significantly and 
total number of nests found (r = 0 79 M ne^V™ ® pra,rle chickens included 
chicks hatched (r = 0 . 899 ? hftcha^M lit de "! ,ty (l J °’ 631 )' number of 
number of hens seen on booming grounds (r = O^L) 1 C?’t^' • ^ th ® maxlmum 
Of eggs were not significantly correlated wi^h annual Ib^nSance? * rtM,t '' 
populations and nestdenstues^fdther birds'^rh rel f t . iri 9 indices of mammal 
matches (I . 0, 27) ; ed po’l ^i/ctr^i ^r 
significantly correlated^ tlTpra"^ 9 chickf" 5 "' 65 ° f ° ther avian species was 
Of the number of prairie chicken nests to the mM 5 " 0 ? 5 ' However, the ratio 
ground-nesting species was significant! * ^ * number of nests of other 
with nest success. , n other^rd. A the" " e9at ! vely correlated (r = 0 . 6 9 2 ) 
to nests of other ground-nesters increased prop ° rtlon of P ra 'rie chicken nests 
declined. This phenomenon was a 1 , uded ^o In MWrV^) : 2?' Pr6lrle Ch, ' Cke " S 
they indicatr v lh?ch a vl r tabl , ermarbrir rt t^ varlables are not definitive but 
to scrutinize habitat and weather var, ! ab?es ?n L\^ ' 0t *' a " al V sis - ^ intend 
finally summarized. a Sim, ' ar fashion when they are 
