LIST OF FIGURES 



Page 

 Figure 1. Poster utilized in 19h7 and 19U8 to request the 

 aid of the public in reporting sea lamprey 

 spawning runs 9 



Figure 2. Questionnaire utilized during the inventory by 



field personnel for reporting sea lamprey runs 10 



Figure 3. Distribution of migrating and spawning sea 

 lampreys observed or reliably reported in 

 llichigan streams in 19h7 and 19hQ 12 



Figure k- Lower Falls, Ocqueoc River, Presque Isle County, 



■vriiich lampreys negotiate upstream. May 17, 19U7...» 16 



Figure 5. Upper Falls, Ocqueoc River, Presque Isle County, 



which lampreys negotiate upstream. May 17, 19U7.... 16 



Figure 6. Foote Dam on the Au Sable River, Iosco County 18 



Figure 7. Diagrams of Carp Creek sea lamprey treir 22 



Figure 8 . Carp Creek weir, May $, 19h7 23 



Figure 9. Carp Creek weir. May 5, 19li7. Looking downstream... 23 



Figure 10. Carp Creek weir at low water stage. July 1, 19U7... 2U 



Figure 11. Ocqueoc River sea lamprey weir. View from 



doimstream 29 



Figure 12. Ocqueoc River sea lamprey weir. View from 



upstream 29 



Figure 13. Sea lampreys captured in a gill net in Ocqueoc 



Lake, June 2 5, 19U7 32 



Figure lii. Observer standing on the alluvial fan in Hammond 

 Bay off the mouth of Carp Creek where sea lam- 

 preys were first observed on April lU, 19U7 35 



Figure l5. Number of sea lampreys taken each day in the Carp 

 Creek weir between April 22 and July 13, 19U7, 

 and the mean water temperature and water gauge 

 readings for this period 36 



Figure 16. Number of sea lampreys taken each day in the Carp 

 Creek weir between April 7 and July 15, 19U8, and 

 the mean water temperature and water gauge read- 

 ings for this period 37 



IV 



