Hemimysis anomala Survey & Monitoring Network
Reports
Click on map to access reports by geographic area.
*Fish Samples are samples taken from the gut contentsof fish which have been confirmed as Hemimysis anomala. Gut contents leave some uncertainty as to the exact location at which the fish may have consumed the shrimp.
Lake Erie
Dunkirk, NY (Dunkirk Steam Station) Lat 42.4919 Lon -79.3469. April 5, 2007. 1 collected and reported to USGS.
Kingsville, Ontario.(Lat 42.02573 Lon -82.73188 ) August 20, 2007 bottle traps set about 25-50 cm above the bottom for 12-14 hours overnight and a night sampling with a zooplankton net set on the bottom of the lake and waited 1-2 min before bring it up slowly to the surface. ID confirmed by Dept. Fisheries and Oceans Canada.
Port Dover, Ontario. In gut contents of a white perch in samples from midway between Port Dover and the Stelco/Nanticoke industrial complex (42.770833N, -80.120833E) in approximately 5.5m of water. August 1, 2006. Lake Erie Management Unit, Ontario Ministry of Natural Resources tentatively confirmed ID by telson photos. Gut contents leave some uncertainty as to the exact location at which the fish may have consumed the shrimp; however, given that the stomach contents weren't greatly digested, it is probable that the fish did not travel very far after eating before being captured.
Port Stanley, Ontario. Lat 42.65798 Lon -81.21184 ) August 22, 2007 bottle traps set about 25-50 cm above the bottom for 12-14 hours overnight and a night sampling with a zooplankton net set on the bottom of the lake and waited 1-2 min before bring it up slowly to the surface. ID confirmed by Dept. Fisheries and Oceans Canada.
Presque Ile Bay, Erie, PA No Hemimysis anomala detected. Summer-fall 2007 bottle traps.
Toledo, OH. No Hemimysis anomala detected. Boat basin across from Lake Erie Center (approximately 41 deg 41.43' N, 83 deg 23.92' W) on November 12, 2006. Dipnet sweeps along the walls both lake-side and inside and along the rocky area.
Lake Huron
Goderich, Ontario - August 6 & 7, 2008. A few hundred caught in bottle traps set overnight. Confirmed by DFO.
Kincardine, Ontario - Station H1A (outside near end of north pier at Penatangore River mouth in Lake Huron, approx. 3 m deep) & Station H1B – (inside of pier in river water discharging into lake, approx. 2 m deep; higher turbidity (sediment); armour stone nearby) ~44.17812N, 81.64305W. June 10, 2008 dozens collected via net hauls & bottle traps set overnight . Confirmed by Fisheries and Oceans Canada.
Port Elgin, Ontario - Station H2 (off end of concrete breakwall just inside marina, approx. 2 m deep, armour stone breakwall nearby; water quite transparent) ~ 44.44494N, 81.40508W. June 11, 2008 a few small individuals collected in net hauls and bottle traps set overnight. Confirmed by Fisheries and Oceans Canada.
Southhampton, Ontario - Station H3B (off end of concrete breakwall on south side of Saugeen River mouth within river discharge, approx. 4 m deep, armour stone breakwall nearby; water highly turbid) ~44.50081N, 81.37408W. June 11, 2008 a few small individuals and one gravid female collected in net hauls and bottle traps set overnight. Confirmed by Fisheries and Oceans Canada.
Thunder Bay, Alpena, MI - No Hemimysis anomala detected. May 2007, plankton tows and bottle traps in nearshore waters.
Lake Huron - Georgian Bay
Bying Inlet / Britt Dock, Ontario. No Hemimysis anomala detected during Dept. Fisheries and Oceans Canada survey. Lat 45.52731 Lon -80.50436. July 10, 2007.
Midland docks, Ontario. No Hemimysis anomala detected during Dept. Fisheries and Oceans Canada survey. Lat 44.7535 Lon -79.88862 . July 11, 2007.
Parry Sound CG dock, Ontario. No Hemimysis anomala detected during Dept. Fisheries and Oceans Canada survey. Lat 45.34348 Lon -80.04179. July 9, 2007.
Penetanguishene, Ontario No Hemimysis anomala detected during Dept. Fisheries and Oceans Canada survey. Lat 44.77424 Lon -79.93942. July 12, 2007.
Point Au Baril, Ontario. No Hemimysis anomala detected during Dept. Fisheries and Oceans Canada survey. Lat 45.5952 Lon -80.38296. July 10, 2007.
Snug Harbour, Ontario. No Hemimysis anomala detected during Dept. Fisheries and Oceans Canada survey. Lat 45.37448 Lon -80.3007. July 10, 2007.
Lake Michigan
Charlevoix, MI No Hemimysis anomala detected. Two areas were sampled with multiple triplicate 500 micron vertical net hauls and bottle traps at Charlevoix, Michigan during June 2007: (1) along the pier structure at the foot of Palmer St, on the western edge of the south breakwall immediately east of the red channel entrance navigation light for the channel between Lake Michigan and Lake Charlevoix (approx 45 19.166N, 86 15.774W) and (2) at the U.S. Coast Guard Station-Charlevoix, along the breakwall on the north side of the channel just before it opens into Lake Charlevoix (approx. 45 18.946N; 85 14.729W)
Chicago, IL. Approximately 1 nautical mile offshore of Jackson Harbor, GPS coordinates are N 41 47.390 W 87 33.483; depth at the location is 7 meters. 1 specimen collected 7/31/2007 during a night neuston net tow (500 um mesh) at the surface. No visible signs of a swarm were observed at the collection site. ID confirmed by Illinois Natural History Survey, specimen preserved in 90% ethanol. Second specimen collected 7/24/2007 approximately 1.3 miles south of the previous location.
Elk Rapids, MI. No Hemimysis anomala detected during Dept. Fisheries and Oceans Canada survey. Lat 44.90287 Lon -85.4171 . June 21, 2007.
Escanaba, MI.( Lat 45.7468 Lon -87.0466 ) June 24, 2007 night sampling with a zooplankton net set on the bottom of the lake and waited 1-2 min before bring it up slowly to the surface. ID confirmed by Dept. Fisheries and Oceans Canada.
Grand Haven, Michigan. Unconfirmed anecdotal reports matching the description of a swarm in the Harbor.
Ludington, MI. No Hemimysis anomala detected during Dept. Fisheries and Oceans Canada survey. Lat 43.9532 Lon -86.45477, Lat 43.95738 Lon -86.53419, Lat 43.95531 Lon -86.56854, & 43.96301 86.47289. June 20, 2007.
Milwaukee, WI. Seen by divers in 12 feet of water off of Bradford Beach (43 degrees 03 minutes 47.0 seconds, 87 degrees 52 minutes 01.87 seconds). Three collected on August 1, 2007 inside of round goby nests; including a gravid female. They saw a total of 15. They like the cavities under rocks, which is why they were probably inside of the goby nests. Confirmed by photo. (Lat 43.04635 Lon -87.88365 ) June 26, 2007 night sampling with a zooplankton net set on the bottom of the lake and waited 1-2 min before bring it up slowly to the surface. ID confirmed by Dept. Fisheries and Oceans Canada.
9/4/2007 - Donges Bay (15 miles north of Milwaukee Harbor at 43 degrees 15.42 N and 87 degrees 54.21 W). Trap and scuba observations with 2 in the trap and 3 seen while turning over rocks. Confirmed by Janssen.
9/27/2007 - Bradford Beach site. 15 individuals caught in a trap. Confirmed by Janssen.
Muskegon, Michigan. In the channel between Lake Michigan and Muskegon Lake. November 7, 2006. Reported and confirmed by NOAA GLERL staff. Large numbers of individuals formed swarms averaging 1540 ± 333 individuals/m2. The population included females (63%), males (35%) and juveniles (2%). Some females were in a reproductive condition.
Naubinway, MI. (Lat 46.08733 Lon -85.44372) June 22, 2007 bottle traps set about 25-50 cm above the bottom for 12-14 hours overnight and a night sampling with a zooplankton net set on the bottom of the lake and waited 1-2 min before bring it up slowly to the surface. ID confirmed by Dept. Fisheries and Oceans Canada.
Rowleys Bay, WI. (Lat 45.21848 Lon -87.0328 ) June 25, 2007 night sampling with a zooplankton net set on the bottom of the lake and waited 1-2 min before bring it up slowly to the surface. ID confirmed by Dept. Fisheries and Oceans Canada.
Sheboygan, Wisconsin. March 10, 2007. Unverified findings in the stomach of a brown trout caught off a breakwall. Given the cold water temperatures, may have been Mysis relicta (identified in some recent scientific literature as Mysis diluviana).
Waukegan, IL.. In gut contents of a yellow perch in samples from a bit south of Waukegan Harbor about 1/2 to 3/4 of a mile offshore over rocky substrate in about 10 ft of water. September 25, 2006. Also in gut contents of Age-0 yellow perch collected in 9 m of water on August 15, 2006. Gut contents leave some uncertainty as to the exact location at which the fish may have consumed the shrimp.
West Traverse Bay, MI. No Hemimysis anomala detected. Two areas were sampled with multiple triplicate 500 micron vertical net hauls and bottle traps at the southern tip of west Traverse Bay during June of 2007: (1) along the seawall between Hall St and S. Cass St. (approx. (a) 44 46.007N, 85 37.506W; (b) 44 46.000N, 85 37.204W) and (2) on the wharf adjacent to the Great Lakes Campus of Northwestern Michigan University, near the foot of Barlow St (approx. 44 45.948N, 85 36.430W)
Lake Ontario
Bowmanville, Ontario. No Hemimysis anomala detected during Ontario Ministry of Natural Resources survey (night-time nearshore surface tows). September 2007.
Cobourg, Ontario. September 2007. Hemimysis present in night-time nearshore surface tows. Ontario Ministry of Natural Resources survey.
Collins Bay (Kingston), Ontario. No Hemimysis anomala detected during Ontario Ministry of Natural Resources survey (night-time nearshore surface tows). September 2007.
Hamilton Harbor, Burlington, Ontario. Two Hemimysis bottle traps deployed on June 14 and again on June 20 from the dock at north edge of Canada Centre for Inland Waters (CCIW) property (rocky reinforced shoreline, 2-3 m deep, water temperature 20-21C). One individual caught on each date, both male, ~8 mm long, showing red coloration and distinctive square telson with corner spines. Confirmed and reported by Kelly Bowen, Research Biologist, Great Lakes Lab for Fisheries & Aquatic Science, Fisheries & Oceans Canada.
Hamilton Harbor, Ont. CCIW. (Lat 43.29613 Lon -79.79768 ) June 15 & July 4, 2007 bottle traps set about 25-50 cm above the bottom for 12-14 hours overnight and a night sampling with a zooplankton net set on the bottom of the lake and waited 1-2 min before bring it up slowly to the surface. ID confirmed by Dept. Fisheries and Oceans Canada.
Long Point, Ontario. No Hemimysis anomala detected during Ontario Ministry of Natural Resources survey (night-time nearshore surface tows). September 2007.
Olcott, NY. One Hemimysis anomala was collected by bottle trap off the west pier at Olcott, NY on 6/27/07. The trap was deployed at the base of the pier (on the creek side) over rocky substrate on 6/26 (2:45 pm) and retrieved at 11:32am on 6/27. Trap was positioned approximately 1 meter down over 1.75 meters of water depth. The trap was baited with fish food (Tetra ColorFin Sinking Granules). Pictures show the distinctive square telson; overall length was approximately 6 mm. Organism was completely pink in color when first collected. Reported by Michael A. Goehle, Aquatic Nuisance Species Coordinator – Northeast Region, U.S. Fish & Wildlife Service, Amherst, NY.
Oswego, NY. Lake Ontario waters off Nine Mile Point near Oswego in 10-25 foot waters. May 2006. Found in surveys by Normandeau Associates, Inc. ID confirmed. Samples included both juvenile and adult Hemimysis. Anecdotal reports from water intake maintenance crews indicate that Hemimysis may have been in this vicinity as early as 2002.
8/21-22/2007 - West of Nine Mile Point. USGS set gillnets overnight over rocky substrate at apprx 6 m depth. Photo confirmed findings of Hemimysis anomalain alewife stomachs. One sample stomach contained apprx 150 individuals.
Pickering, Ontario. Hemimysis were found in intake water samples from November 22 and December 6, 2006 at Pickering Nuclear Generating Station on Lake Ontario, east of Toronto. The intake brings in near-surface water directly from an artificial bay in front of the station. Similar samples were taken periodically throughout 2006, but no Hemimysis were detected.
The specimens ranged from approx 8 to 12 mm total length. Thirteen individuals were found in the Nov. 22 sample, and a single individual was found in the Dec.6 sample. The identification was made based on the shape of the telson. The samples were collected for Bob Hester of the Ontario Power Generation by David Stanley of Golder Associates, and identified by Ted Schaner of the Ontario Ministry of Natural Resources.
Presqu'ile, Ontario. September 2007. Hemimysis present in night-time nearshore surface tows. Ontario Ministry of Natural Resources survey.
Whitby, Ontario. September 2007. Hemimysis present in night-time nearshore surface tows. Ontario Ministry of Natural Resources survey.
Lake St. Clair
Grosse Point, MI No Hemimysis anomala detected during NOAA GLERL survey at Alfred Brush Ford Park (Lat 42.21N Lon 82.56W) on November 27, 2007
Lighthouse Cove and Belle River Marina, Ontario. No Hemimysis anomala detected during Dept. Fisheries and Oceans Canada survey. Lat 42.31807 Lon -82.45358 & Lat 42.30158 Lon -82.70885. July 25, 2007.
Mt Clemens, MI No Hemimysis anomala detected during NOAA GLERL survey of DNR boat launch (Lat 42.36N Lon 82.46W) on November 27, 2007
Detroit River
Amherstburg, Ontario. No Hemimysis anomala detected during Dept. Fisheries and Oceans Canada survey. Lat 42.09995 Lon -83.11225. July 18, 2007.
Bolles Harbor, MI No Hemimysis anomala detected during NOAA GLERL at DNR fishing pier (Lat 42.52N Lon 82.23W) on November 28, 2007
LaSalle, Ontario. No Hemimysis anomala detected during Dept. Fisheries and Oceans Canada survey. Lat 43.23697 Lon -83.10705. July 17, 2007.
Trenton, MI No Hemimysis anomala detected during NOAA GLERL at Elizabeth Park Marina (Lat 42.08N Lon 82.11W) on November 28, 2007
Windsor, Ontario. No Hemimysis anomala detected during Dept. Fisheries and Oceans Canada survey. Lat 42.33953 Lon -82.92711 & Lat 42.32206 Lon -83.032. July 16-17, 2007.
Wyandotte, MI No Hemimysis anomala detected during NOAA GLERL survey off the pier at Bishop Park (Lat 42.12N Lon 82.09W) on November 28, 2007
St. Clair River
Algonac, MI No Hemimysis anomala detected during NOAA GLERL survey of boat slips (Lat 42.38N Lon 82.31W) on November 26, 2007
Marine City, MI No Hemimysis anomala detected during NOAA GLERL survey of boat launch (Lat 42.42N Lon 82.30W) on November 26, 2007
Port Huron, MI No Hemimysis anomala detected during NOAA GLERL survey of Boat Slips near the Port Huron Yacht Club (Lat 42.59N Lon 82.25W) on November 26, 2007
Port Lambton, Ontario. No Hemimysis anomala detected during Dept. Fisheries and Oceans Canada survey. Lat 42.65733 Lon -82.50691. July 25, 2007.
Sarnia, Ontario. No Hemimysis anomala detected during Dept. Fisheries and Oceans Canada survey. Lat 43.00125 Lon -82.41345, Lat 42.98287 Lon -82.41361 & Lat 42.99056 Lon -82.41939. July 23-24, 2007.
St. Clair, MI No Hemimysis anomala detected during NOAA GLERL survey of boat launch (Lat 42.49N Lon 82.29W) on November 26, 2007
Welland Canal
Port Colbourne, Ontario. Lat 42.88112 Lon -79.24925 ) August 22, 2007 bottle traps set about 25-50 cm above the bottom for 12-14 hours overnight and a night sampling with a zooplankton net set on the bottom of the lake and waited 1-2 min before bring it up slowly to the surface. ID confirmed by Dept. Fisheries and Oceans Canada.