Appendix 6.3(11) Concluded 



Transect width is one-quarter mile. These transects were originally es- 

 tablished by Chabreck et al. (1968b) for the purpose of mapping vegetation 

 types in the Louisiana coastal area. Eleven species of ducks and coots 

 were counted. 



Weather permitting, flights are attempted on a monthly basis, although 

 there is a great deal of variability in both time between surveys and the 

 number of days required to complete a single survey. With few exceptions, 

 the interval between surveys was 9 to 46 days and the time required to com- 

 plete a survey ranged from 5 to 14 days. There were no flights from March 

 to July (with the exception of 1971 when surveys were flown all months ex- 

 cept July) . The primary application of the survey has been in setting 

 hunting regulations; therefore, census emphasis has been placed on migra- 

 tory species that constitute the bulk of Louisiana's waterfowl population. 

 Survey coverage is complete for all years between September and January, 

 and much of the graphical output uses only this interval. 



97 



