ASSESSMENT




Larval


Tributary streams and lentic areas of the Great Lakes systematically are assessed for abundance of larval sea lampreys to determine when lampricide treatments are required and effectiveness of past treatments. The surveys primarily are conducted with backpack electrofishing gear in water 1m deep or less and with deepwater electrofishing gear or granular formulation of the lampricide Bayer 73 in water deeper than 1m. The analysis estimates the number of larvae and maps their distribution in each stream in the current year, and estimates the number of transforming larvae that will leave the stream in the following year.

Streams considered candidates for lampricide treatment in 1996 were surveyed in 1995 to provide statistically reliable estimates (+/- 50% of the mean) of larval density and amounts of habitable substrates. Survey plots were randomly selected, catch of larvae was corrected for gear efficiency, and length of larvae was standardized to the end of the growing season. Estimated mean density of larvae in the survey plots was expanded by estimated total amount of substrates that was inhabited by larvae. A curve for probability of transformation derived from historical data estimated the number of larvae that will transform and leave the stream in 1996. The streams scheduled for treatment in 1996 are ranked on an estimated cost per kill of transformer.


Lake Superior Larval Assessment




Table 8.  Status of Lake Superior tributaries that have been treated for sea lamprey larvae, 1986-95.

Stream Last Last Residuals Oldest Larval Transformer Treated Surveyed Found Reestablished Estimate Estimate Year Class In 1995 for 1996

UNITED STATES Waiska R. May-88 1995 No 1993 Pendills Cr. Sep-88 1995 No 1992 Galloway Cr. Jun-92 1995 No 1993 Tahquamenon R. Jul-90 1995 No 1991 Betsy R. Aug-94 1995 Yes 1995 L. Two Hearted R. Jul-91 1995 No 1992 Big Two Hearted R. Oct-95 (1) Sucker R. Jul-94 1995 Yes 1994 Sable Cr. Sep-89 1995 No 1990 Sullivans Cr. Jul-87 1995 No 1991 Beaver Lake Outlet Sep-87 1995 No 1990 Miners R. Aug-92 1995 No 1993 Furnace Cr. Aug-92 1995 No 1994 Au Train R. Jul-90 1995 No 1991 77,714 3,817 Rock R. Jul-90 1994 No 1994 Chocolay R. Aug-94 1995 Yes 1994 Carp R. Jul-88 1995 No 1991 4,481 116 Harlow Creek Oct-92 1995 No 1993 Little Garlic R. Oct-89 1995 No 1990 6,196 375 Big Garlic R. Jul-93 1995 No 1993 16,553 0 Iron R. Jun-91 1995 Yes 1991 17,658 509 Salmon Trout R. Jun-95 (1) Pine R. Oct-87 1995 No 1993 Huron R. Sep-94 (1) Ravine R. Aug-87 1994 No 1993 Silver R. Sep-93 1995 Yes 1994 Falls R. Aug-95 (1) Sturgeon R. Oct-94 (1) Traverse R. Aug-94 1995 Yes 1994 Salmon Trout R. Aug-92 1995 No 1992 6,428 0 Misery R. Sep-93 1995 No 1994 East Sleeping R. Jun-95 (1) Firesteel R. Oct-92 1995 Yes 1993 105,359 2,912 Ontonagon R. Sep-92 1995 Yes 1993 250,164 13,061 Potato R. Jun-90 1995 No 1993 15,808 16 Cranberry R. Jun-90 1995 No 1993 98,218 311 Bad R. Sep-95 (1) Red Cliff Cr. Jun-94 1995 No None Sand R. Oct-91 1995 No None Brule R. Aug-92 1995 No 1992 19,763 80 Middle R. Sep-94 1994 No None Amnicon R. Oct-94 1994 No None Nemadji R. (Black R.) Aug-93 1995 No 1993 St. Louis R. Sep-87 1993 No 1988

Stream Last Last Residuals Oldest Larval Transformer Treated Surveyed Found Reestablished Estimate Estimate Year Class In 1995 for 1996

CANADA West Davignon Cr. May-89 1995 No None 0 0 Little Carp R. Jun-93 1995 No 1994 400 0 Big Carp R. Jun-93 1995 No 1993 2,300 0 Cranberry Cr. Jun-90 1994 No None 0 0 Goulais R. Aug-95 (1) Haviland Cr. none (2) 1994 300 10 Harmony R. Jun-90 1995 Yes None 0 0 Chippewa R. Aug-90 1995 No 1991 6,800 0 Batchawana R. Jul-94 1995 Yes 1994 56,200 0 Carp R. Jun-94 1995 No None 0 0 Pancake R. Jul-93 1995 No 1993 20,681 0 Westman's Cr. none (2) 1995 - - 100 0 Agawa R. Aug-84 1995 Yes 1985 26,600 190 Gargantua R. Jun-95 (1) Michipicoten R . Aug-95 (1) White R. Sep-88 1995 No 1993 2,100 0 Pic R. Aug-90 1995 No 1991 488,300 1,180 Little Pic R. Sep-94 (1) Prairie R. Jul-94 1995 No None 0 0 Steel R. Jul-89 1995 No 1989 2,100 320 Pays Plat R. Aug-93 1995 Yes 1993 70,300 0 Gravel R. Jul-94 1995 Yes 1994 42,100 20 Little Gravel R. Jul-95 1995 No None Cypress R. Jul-94 1995 Yes 1994 25,300 0 Jackpine R. none (2) 1994 Jackfish R. Jul-92 1995 No 1992 86,200 300 Upper Nipigon R. Aug-92 1995 Yes 1992 287,800 280 Lower Nipigon R. Jul-83 1995 Yes pre 1990 146,700 1,200 Cash Cr. Jul-91 1995 No 1991 38,300 150 Polly Cr. Jul-87 1994 Yes 1989 Stillwater Cr. Jul-91 1995 No 1991 10,500 40 Black Sturgeon R. Jul-95 (1) Wolf R. Jul-94 1995 Yes 1994 15,200 0 Pearl R. Jul-91 1995 No 1991 5,700 0 MacKenzie R. Sep-78 1994 No pre 1990 Current R. none (2) 1994 Neebing-McIntrye Floodway Jul-94 1995 Yes 1994 26,300 40 Kaministiquia R. Aug-92 1995 Yes 1992 199,000 590 Cloud R. Jul-94 1995 No None Pine R. Jul-73 1994 No pre 1990 low 0 Pigeon R. Jul-94 1995 Yes None 3,500 140 1Not surveyed since last lampricide treatment. 2 Ma y have an associated lentic population.



Lake Michigan Larval Assessment

Table 10.  Status of Lake Michigan tributaries that have been treated for sea lamprey larvae, 1986-95



Stream Last Last Residuals Oldest Larval Transformer Treated Surveyed Found Reestablished Estimate Estimate Year Class In 1995 for 1996

Brevort R. May 89 1995 No 1991 Paquin Cr. Oct 87 1995 No 1989 Hog Island Cr. Jun 92 1995 Yes 1992 3,436 195 Black R. Jun 91 1995 Yes 1991 524,392 266 Millecoquins R. Jun 95 1995 (1) Rock R. Jun 95 1995 (1) Crow R. May 86 1995 No None Hudson Cr. May 90 1995 No 1990 4,578 8 Swan Cr. Jul 92 1993 No None Milakokia R. Jun 94 1995 Yes 1994 Gulliver Lake Outlet Aug 88 1995 No 1994 Marblehead Cr. Aug 88 1995 No 1992 10,579 107 Manistique R. Aug 89 1995 No 1992 Deadhorse Cr. May 91 1995 No 1992 26,595 20 Parent Cr. Jun 91 1995 No 1994 Poodle Pete Cr. Jun 91 1995 No 1991 Valentine Cr. May 91 1995 No 1991 3,064 7 L. Fishdam R. Jul 92 1995 Yes 1993 Big Fishdam R. May 95 1995 No (1) Sturgeon R. May 94 1995 Yes 1994 Ogontz R. Jun 92 1995 Yes 1992 20,397 146 Whitefish R. Aug 95 1995 (1) Rapid R. Jun 95 1995 (1) Tacoosh R. May 92 1995 No 1993 17,163 150 Days R. Jun 94 1995 No 1994 Ford R. Apr 93 1995 Yes 1993 1,181,683 36,399 Bark R. Oct 92 1995 No None Cedar R. Sep 93 1995 Yes 1994 Bailey Cr. Sep 93 1995 Yes 1994 Beattie Cr. Jun 88 1995 No 1993 Peshtigo R. Jun 91 1995 No 1991 10,947 305 Oconto R. May 87 1995 No 1994 Hibbards Cr. May 95 1995 Yes None Whitefish Bay Cr. May 87 1994 No None East Twin R. May 95 1994 (1) Fischer Cr. May 87 1995 No None Carp Lake R. Sep 94 1994 Yes (1) Big Sucker Cr. May 89 1994 No 1989 Wycamp Lake Outlet Sep 88 1994 No 1993 Horton Cr. Sep 93 1995 Yes 1994 Boyne R. Aug 91 1995 No 1992 Porter Cr. Aug 94 1995 No 1995 Jordan R. Aug 92 1995 Yes 1993 Elk Lake Outlet Aug 88 1995 No 1989 Mitchell Cr. Jun 94 1995 No 1994 Boardman R. Hospital Cr. Jun 91 1995 Yes 1991 81,082 4,221 Lower Jul 91 1995 Yes 1991 Upper Aug 87 1994 No None Platte R. Jun 92 1995 No 1992 1,347,167 7,212 Betsie R. Jun 95 1995 No 1995 Big Manistee R. Jul 94 1995 Yes 1994 L. Manistee R. Jul 94 1995 Yes 1994 Gurney Cr. Sep 93 1994 Yes None Lincoln R. Jun 94 1995 Yes 1994 Pere Marquette R. Aug 95 1995 Yes None Pentwater R. Jul 92 1995 No 1993 34,051 34 Stoney Cr. Jul 87 1995 No None White R. Aug 95 1995 Yes None Muskegon R. Sep 92 1995 No 1993 6,078,224 235,835 Sand Cr. May 95 1995 No None Minnie Cr. May 95 1995 No None Bigelow Cr. May 95 1995 No None Grand R. Crockery Cr. Sep 91 1995 No 1992 Norris Cr. Jun 87 1995 No None Kalamazoo R. Bear Cr. May 92 1995 No None Sand Cr. May 92 1995 No None Mann Cr. Jun 88 1995 No 1992 Black R. Sep 93 1995 Yes 1994 Brandywine Cr. Jun 85 1995 No 1994 St. Joseph R. Paw Paw R. Sep 92 1995 No 1993 Pipestone Cr. Jul 88 1995 No None Blue Cr. Jul 88 1995 No 1991 Galien R. Jun 93 1995 No 1993 Trail Cr. May 92 1995 Yes None State Cr. May 86 1995 No None Burns Ditch Jun 93 1995 Yes None 1Not surveyed since last lampricide treatment.


Lake Huron Larval Assessment




Table 11.  Status of Lake Huron tributaries that have been treated for sea lamprey larvae, 1986-95.

Stream Last Last Residuals Oldest Larval Transformer Treated Surveyed Found Reestablished Estimate Estimate Year Class In 1995 for 1996

UNITED STATES L. Munuscong R. May 95 (1) Munuscong R May 86 1995 No 1992 12,041 821 Carlton Cr. May 86 1993 No 1988 Caribou Cr. May 91 1994 No None Albany Cr. May 94 1994 Yes None Trout Cr. May 94 1995 Yes None Beavertail Cr. May 91 1995 Yes 1992 9,319 202 Prentiss Cr. Oct 93 1995 Yes None McKay Cr. May 95 (1) Ceville Cr. May 94 1995 No None Hessel Cr. May 91 1995 No None Nuns Cr. Oct 88 1995 No 1993 4,378 805 Pine R. Jun 93 1995 Yes 1993 Carp R. May 93 1995 Yes 1993 698,835 12,791 Martineau Cr. Oct 93 1993 No None Cheboygan R. Maple R. Aug 92 1995 No 1993 Pigeon R. Aug 93 1995 Yes 1994 Sturgeon R. Aug 94 1995 No 1995 Laperell Cr. May 89 1994 No 1993 Meyers Cr. May 89 1994 No 1993 L. Pigeon R. Oct 88 1994 No None Elliot Cr. Jul 92 1995 Yes 1992 27,498 730 Greene Cr. May 92 1995 Yes 1992 13,932 545 Mulligan Cr. May 94 1995 Yes None Black Mallard Cr. May 92 1995 Yes 1992 46,952 5,368 Ocqueoc R. Lower only Aug 93 1995 Yes 1994 Upper only Sep 94 1995 Yes None Schmidt Cr. Aug 93 1994 Yes 1994 Trout R. Jun 93 1995 Yes 1993 Devils R. May 95 (1) Black R. May 94 1995 Yes 1994 Au Sable R. Jun 95 1995 Yes 1995 Pine R. Jun 87 1995 No None Tawas R. Silver Cr. Jun 92 1995 No 1992 Cold Cr. Jun 92 1995 No 1992 464,301 14,148 East Au Gres R. May 93 1995 No 1993 Au Gres R. May 93 1995 No 1993 14.698 Rifle R. Jul 93 1995 Yes 1993 Saginaw R. Shiawassee R. Oct 87 1995 No 1988 Chippewa R. Sep 95 1995 No None Pine R. Oct 88 1995 No 1989 Big Salt Cr. Oct 88 1995 No 1988 26,568 312 Carroll Cr. Oct 88 1995 No 1990 Big Salt R. May 93 1995 No 1993 Pine R. Apr 88 1994 No None

Stream Last Last Residuals Oldest Larval Transformer Treated Surveyed Found Reestablished Estimate Estimate Year Class In 1995 for 1996

CANADA St. Marys R. none 1995 pre 1990 3,400,000 Root R. Sep-95 (1) Garden R. Jul-94 1995 No 1994 280,700 0 Echo R. Jul-94 1995 Yes 1994 13,400 0 Sucker Cr. Jul-95 (1) Twotree R. May-90 1995 No 1993 1,200 0 Richardson Cr. Jun-89 1995 No 1990 1,600 290 Watson Cr. Jun-94 1994 No none 0 0 Gordon Cr. Jun-92 1995 Yes 1992 12,300 1,200 Brown's Cr. Sep-92 1995 No 1993 17,200 0 Koshkawong R. Jul-93 1995 No 1993 1,900 0 Unnamed (H-68) (2) Sep-75 1995 No pre 1990 Thessalon R.(upper) Sep-91 1995 Yes 1992 148,900 12 Thessalon R.(lower) Jun-92 1995 Yes 1992 129,600 63 Livingstone Cr. Aug-94 1995 No none 0 0 Mississagi R. Aug-95 (1) Blind R. May-84 1995 No pre 1990 100 0 Lauzon R. Jul-93 1995 Yes 1993 200 10 Spragge Cr. Oct-95 (1) none Serpent R. (main) Jul-93 1995 No none 0 0 Serpent R. (Grassy Cr.) Jul-93 1995 Yes 1993 2,600 220 Spanish R. Aug-94 1995 Yes 1994 62,161 630 Kagawong R. Aug-67 1991 No pre 1990 Silver Cr. May-94 1994 No none 0 0 Sand Cr. Oct-94 (1) Mindemoya R. Jun-93 1995 Yes 1993 97,000 0 Timber Bay Cr. Jun-93 1995 Yes 1993 23,700 0 Manitou R. May-94 1995 No 1994 400 0 Blue Jay Cr. May-94 1995 Yes none 0 0 Chikanishing R. Jun-95 (1) French R. (main) none 1992 pre 1990 French R. (Wanapitei). Aug-94 1995 No none 0 0 French R. (West Chan) Jun-92 1995 No 1992 3,800 30 Still R. Jun-88 1995 No 1989 23,600 900 Magnetawan R. Jul-93 1995 Yes 1993 76,600 280 Naiscoot R. Jun-93 1995 No 1993 70,200 0 Shebeshekong R (.)2 none 1993 pre 1990 Boyne R. Jun-95 (1) Musquash R. Aug-88 1995 No 1989 62,000 920 Coldwater R. (2) none 1994 Sturgeon R. Jun-95 (1) Nottawasaga R. Jun-93 1995 Yes 1993 1,851,900 2,400 Beaver R. (2) none 1995 Sauble R. Jun-85 1995 No pre 1990 21,900 2,940 Saugeen R. Jun-71 1995 No pre 1990 8,800 100 1 Not surveyed since last lampricide treatment. 2May have an associated lentic population.


Lake Erie Larval Assessment



Table 12.  Status of Lake Erie tributaries that have been treated for sea lamprey larvae, 1986-95.

Stream Last Last Residuals Oldest Larval Transformer Treated Surveyed Found Reestablished Estimate Estimate Year Class In 1995 for 1996

UNITED STATES Delaware Cr. Oct-86 1995 No None Cattaraugus Cr. Oct-94 1995 Yes 1995 Halfway Br. Oct-86 1994 No None Canadaway Cr. Oct-86 1994 No None Crooked Cr. Oct-90 1995 No 1991 Raccoon Cr. Oct-90 1994 No 1991 Conneaut Cr. Oct-95 1995 No None Grand R. Apr-87 1995 No 1991 CANADA East Cr. Jun-87 1995 No None Catfish Cr. Jun-87 1995 No None Big Otter Cr. May-91 1995 No None South Otter Cr. Oct-86 1995 No None Clear Cr. May-91 1995 No None Big Cr. May-92 1995 No 1992 42,230 9,916 Forestville Cr. May-89 1995 No None Normandale Cr. May-87 1995 No None Fishers Cr. Jun-87 1995 No 1994 54 0 Young's Cr. May-91 1995 No None



Lake Ontario Larval Assessment



Table 13.  Status of Lake Ontario tributaries that have been treated for sea lamprey larvae, 1986-95

Stream Last Last Residuals Oldest Larval Transformer Treated Surveyed Found Reestablished Estimate Estimate Year Class In 1995 for 1996

UNITED STATES Black R. Jun-91 1995 No 1995 Stony Cr. Sept-82 1995 No None South Sandy Cr. May-93 1995 No 1993 64,157 1,223 Skinner Cr. May-93 1995 No 1995 Lindsey Cr. May-94 1995 Yes 1994 22,945 1,032 Blind Cr. May-76 1995 No None Little Sandy Cr. May-95 1995 No 1995 Deer Cr. May-95 1995 Salmon R. May-95 1995 Yes 1995 Grindstone Cr. Apr-94 1995 Yes 1994 Snake Cr. May-95 1995 Sage Cr. Apr-78 1995 No None Little Salmon R. May-94 1995 Yes 1994 Butterfly Cr. May-72 1995 No None Catfish Cr. May-93 1995 No 1993 2,314 126 Oswego R. System Black Cr. May-81 1995 No None Big Bay Cr. Sep-93 1995 No None Scriba Cr. May-84 1995 No None Fish Cr. June-95 1995 Yes 1995 Carpenters Br. May-94 1994 No None Hall Br. Never 1995 No None Cold Spring Br. Never 1995 No None Crane Br. Never 1995 No None Putnam Br. Never 1995 No 1990 5,991 1,353 Scaneateles Cr. Never 1995 No None Rice Cr. May-72 1992 No None Nine Mile Cr. May-95 1995 Sterling Cr. May-94 1995 No 1994 Blind Sodus Cr. May-78 1995 No None Red Cr. Apr-94 1994 No None Wolcott Cr. May-79 1993 No None Sodus Cr. May-95 1995 No None Third Cr. Aug-72 1995 No None First Cr. May-95 1995 Salmon Cr. May-93 1995 No 1993 16,764 652 Oak Orchard Cr. May-/88 1994 No None

Stream Last Last Residuals Oldest Larval Transformer Treated Surveyed Found Reestablished Estimate Estimate Year Class In 1995 for 1996

CANADA Ancaster Cr. Apr-77 1994 No 1990 Bronte Cr. Jun-95 1995 No 1995 Sixteen Mile Cr. Jun-82 1994 No pre - 1990 Credit R. May-91 1995 Yes 1991 43,487 25,212 Rouge R. May-94 1995 No none Duffins Cr. Jun-93 1995 No 1993 1,441 112 CarruthersCr. Sep-76 1992 No none Lynde Cr. Sep-95 1995 Oshawa Cr. Apr-93 1995 Yes 1993 50,911 7,860 Farewell Cr. Sep-95 1994 Bowmanville Cr. Jun-95 1995 No 1995 Wilmot Cr. Apr-93 1995 Yes 1993 42,701 2,127 Graham Cr. May-86 1995 No 1993 6,362 792 Port Britain Cr. May-91 1995 No 1991 2,413 1,150 Gage Cr. May-71 1989 No none Cobourg Cr. Aug-92 1995 No 1992 10,737 801 Covert Cr. Apr-94 1994 No none Grafton Cr. May-88 1995 No 1994 Shelter Valley Br. Sep-86 1995 Yes 1992 13,397 4,296 Colborne Cr. Jun-95 1994 Salem Cr. Sep-94 1994 No 1995 Proctors Cr. Jun-95 1995 Smithfield Cr. Sep-86 1994 No none Mayhew Cr. Aug-92 1995 No 1993 1,896 25 Salmon R. Jun-94 1994 No none

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