other than Shatter 's report and general discussions by Applegate 

 {19h7, 19h9), only one other published report of sea lamprey spavjn- 

 ing runs in the upper Great Lakes has been presented; IfecKaye and 

 MacGillivray (19h9) give data on the numbers of migrant sea lampreys 

 captured in several types of traps in six Ontario streams tributary 

 to the North Channel of Lake Hiiron. 



Carp Creek inve s ti gations 



(1) Carp Creek 



Carp Creek is tributary to Hammond Bay of northern Lake Huron, 

 f lo-wing into that bay about four and one-half miles north of the 

 outlet of the Ocqueoc River. The primary drainage area of this 

 creek lies mthin Sections 1, 2, and 3.-. T36W;; R2E, Presque Isle County. 

 Carp Creek proper is 1.5 miles in length between its estuary and its 

 origin in Carp Lake. The latter is about 70 acres in surface area 

 and has a maximum depth of Zk inches.* The shoreline on nearly all 

 sides is encroaching. Approximately six square miles of STwampland 

 drains into Carp Lake primarily as surface drainage. No discrete 

 year-aroxmd streams flow into the lake, as many recent maps would lead 

 one to believe. 



The potential sea lamprey spawning areas of the Carp Creek drain- 

 age basin lie in the 1.5 miles of the creek proper between Carp Lake 

 and its mouth. This portion of the stream has a moderate overall 

 gradient. Gravelly riffle areas alternate with deeper pools (1 to 

 U feet) which have a barren clay bottom. Little shifting sand is 

 present until the creek enters the beach line just upstream from the 

 estuary. Cover, composed predominantly of cedar* and birch, is heavy, 

 and more than a mile of the stream lies in dense shade. Reportedly, 

 in very dry years Caip Creek is reduced to a mere trickle in mid- 

 summer but local opinions on this matter are very conflicting. During 

 19U7> a- moderate volume of flow was present throughout the entire 

 summer months. Although classified as a "trout stream", hi^ water 

 temperatures in summer (78 degrees F, to 82 degrees F. ) give little 

 evidence of suitable trout habitat. The color of the water is typ- 

 ical of many northern streams draining swampland, being generally 

 quite tea-colored. Water chemistrys varied little during the spring 

 months. A typical analysis on June 29, 19U7n a windless^ partly 

 overcast day, was as follows (previous weather clear): 



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