- 5- 
2. Castrate--is booming provntoA?  What chan-e in 
secondary sez oharactors (neck olor, elasticity 
of esopbh^gs, length of pinnae, tail pattern, 
throat color, qebrow, weight)? Do injections of 
androgens bring maleness back? 
3  Inject with androgens during winter: if birds on 
decreased light are retarded, injoet half with 
androgens. 
14. lock male display by injections of oestrogens. 
5. Prevent sound of booming without other alteration-- 
is effectiveness as breeding  isplay irpaired? 
b. Breeding season bosvior--fe4L~les 
1. 'Rffoct of ligbt on development toward breeding--reduce 
natural light on one lot, increase light artificially 
on a second, no treatment on third. 
2. Injoct with androgens--is booming induced? Any other 
male behavior? That change in other secondary sex 
e)aracters (nook color, elasticity of esophagus, length 
of pinnae, tail pattern, throat color, qebrow, weight, 
oviduct, sise of cloaca)? Both quiescent and breeding 
females should be used. 
3. If birds on decreased light are retarded, inject half 
with oestrogens. 
o. Breeding season behvior--mmls tad femles 
1. Polygamous. polyandrous, promiscuous, or monogamous? 
2. Ue of decoys--rlde skins in female attitude; reaction 
of m lu to males injected wlth oestrogens. 
d. Relationship of booming grund and casual booming places to 
Mting PAd nesting. 
1. ? 
e. Mase stimlation 
1. Reduce numbers of sales on several large booming grounds 
2. Increase numbers of ales on small booming grounds, by 
holding penned males onth* booming ground at high and 
low of cycle. 
3. Pepeat (2) on booming ground where remnant populatione 
are declining.