Notes

Outline

Status of Aquatic Nuisance Species in Lake Huron
in 1999


	Jerry McClain
	U. S. Fish & Wildlife Service
	Fishery Resources Office
	Alpena, Michigan 49707

>140 Species in the Great Lakes
80+ in Lake Huron


					40 Plants
					20 Fish
					10 Invertebrates
					10 Algae

Introduction Pathways




		Ballast Water
		Open waterways (Passive)
		Movement of Boats
		Baitfish Dumping

High Profile Exotics Found in Lake Huron


	Mollusks
		Zebra mussel
		Quagga mussel

Eurasian ruffe
(Gymnocephalus cernuus)

Relative Abundance of
Eurasian Ruffe in Thunder Bay
from Fall Bottom Trawling Surveys

Percent of Total Catch Comprised of
Eurasian Ruffe in Thunder Bay
from Fall Bottom Trawling Surveys

Round goby
(Neogobius melanostomus)

Relative Abundance of
Round Goby in Thunder Bay
from Fall Bottom Trawling Surveys

Percent of Total Catch Comprised of
Round Goby in Thunder Bay
from Fall Bottom Trawling Surveys

Round Goby Abundance at Three
Lake Huron Locations

Offshore Depth Distribution of Round Gobies
Southern Lake Huron - Fall 1999

Zebra mussel
(Driessena polymorpha)

Slide 14

Management Measures
Used in Lake Huron


	Ballast control
	Education
	Monitoring/Research
	Regulation
	Legislation

Summary


	Introductions are difficult to control
	Control efforts can be expensive and planning difficult
	Eradication impossible in large open systems
	Prevention is the best measure
	Awareness is necessary for success
	Cooperation is important