Nova J. Silvy

Between February 1975 and June 1977 a total of 5,302 observations of Attwater's prairie chicken (Tympanuchus wpido attwateri) activities was made. These observations included 3,698 sightings at booming grounds and 1,604 other sightings (nests, broods, roost forms and individual birds). These data were analyzed according to vegetation type usage. The birds extensively utilized four of eight major vegetation types plus artificially' maintained areas. Of the major vegetation types, the clumped midgrass received the greatest use (88%). Their preference for a vegetation type was apparently...

The relationship between the number of individuals marked to cost and accuracy of Lincoln Index estimates for a wild population of Key deer (Odocoileus vir· ginianus clavium) of known size was examined. Data indicated that when 50% of the population was marked. there was a greater chance for an accurate estimate; also the cost to trap and mark deer was lowest.

Habitat types and structural features of the habitat were correlated with bobwhite (Colinus virginianus) whistle counts along 133 random transects in Texas. The probable biological significance of these parameters was ascertained by their interrelationships and from the literature. Bobwhite whistle counts were correlated with habitat types that provided adequate food, cover, nest sites, and song posts. If a habitat parameter provided one or more of these requisites and was limited or in excess, it was usually significantly correlated with bobwhite whistle counts. Mesquite (Prosopis spp.)...