A survey of the streams of the eastern tip of the Upper Penin- 

 sula from the Sault Ste. Marie to St. Ignace was made by me in 

 June, 19hQ. Reports had previously been sparse or lacking for 

 this area. Twenty "watersheds and/or small streams were examined 

 including five on Dmrnmond Island. With one exception, no sea 

 lampreys or evidence of sea lampreys "were found. Generally, in 

 all of the "watersheds examined in this area, the streams had a 

 loiT gradient and the current "was sluggish in both tributaries and 

 main channel. Bottom tj^Jes Tvere almost exclusively silt, sand, 

 or clay in varjiLng combinations. Silt loads "i-ere hea"vy in the 

 larger watersheds. Stream characteristics in this area (eastern 

 Chippe"wa and Maclcinac coiinties) are quite uns\iitable for sea 

 lamprey spawning. 



On this survey, sea lampreys were found in Taylor Creek, a 

 tributary of the l,!unuscong River, Unlike the balance of this vrater- 

 shed which vras examined, Taylor Creek had a moderate gradient, 

 clear "water, and areas of rock, rubble, and gravel riffle. Spawning 

 acti"vity observed ivbs limited. 



Easier access, moderate flood conditions, and extensive areas 

 suitable for sea lamprey spawning facilitated the inventory of 

 streams in the northern half of the southern peninsula (Region 2), 

 I believe that we have definitely located the sites of the major 

 spasming runs in this area. Unfortunately we have very little 

 accurate data as to the actual magnitude of most of these. The 

 recoi-xis on magnitude are largely crude estimates (Appendix A, 

 Table 1). 



Generally speaking, sea lamprey spavniing runs occur in every 

 major LUchigan river system in the Lake Michigan basin: The 

 St. Joseph, Kalamazoo, Grand, Muskegon, Pere Marquette, Manistee, 

 Platte, Boardman, Manistique, and Menominee. These rivers support 

 the largest runs observed in this basin. In northern Lalce Hxiron 

 (north of Saginavr Bay) all major drainages attracted spa"vming 

 migrants: the Rifle, Au Gres, Au Sable, Thunder Bay, Ocqueoc, and 

 Cheboygan. Again, these were tiie largest runs observed in this 

 area. 



Establishment in inland lakes 



Until this inventory, there was some conjecture as to whether 

 the sea lamprey could, or vrould, become es"tablished in some of our 

 larg"e and rather deep inland lakes althou^ the species is kno'wi 

 from certain of the Finger Lakes in New York. Proof follows that 

 small populations of this fish are passing their adult, parasitic 



- 13 - 



