Biological Survey — Erie-Xiagara Watershed 



43 



Occasional shore seining with 150 foot seine to supplement the 

 off-shore work. 



In order to facilitate the work the field program was divided 

 into two parts, the young fish collections (Petersen and Helgoland 

 trawls) and the limnological collections being taken on alternate 

 weeks. This allowed the laboratory staff two weeks to complete 

 the more time-consuming work on the chemical, bacteriological, 

 and plankton analyses. 



Table II. — Navette Stations 



