Status of Coregonines in Lake Huron, 1999 Mark Ebener Chippewa
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Status of Coregonines in Lake Huron, 1999 Mark Ebener Chippewa/Ottawa Resource Authority Lloyd Mohr Upper Lakes Management Unit, Lake Huron, OMNR
Fish Community Objectives i) Maintain diversity ii) Sustainable Annual Harvest = 3.8 million kg iii) Restore lake herring iv) Protect rare deepwater ciscoes
ii) Sustainable Annual Harvest x10 6 kg Fish Community Objectives FCO
iii) Restore Lake Herring % Coregonine Harvest 1912 = 69% 1930 = 18% 1970 = 1% 1999 = 0.4% 1999 Harvest = 15,000 kg
iv) Protect Rare Deepwater Ciscoes Extinct Extinct Abundant
European settlers harvesting whitefish by 1760 Commercial fishing began in earnst about 1820 Canadian seine fishery for whitefish along Fishing Islands gill nets fished near Alpena about 1835 Peak whitefish harvest about 1890 mesh sizes declining from 5-6 inch stretch to 4 1/2 inch.
Lake Whitefish - Great Lakes Harvest,
waters 8 stocks 8 stocks modeled Canada Stocks under review in Canada WFH
Lake Whitefish - Abundance, i.e. Trap net CPUE U. S waters Canadian waters
Lake Whitefish - Recruitment Good to Excellent Fair to Poor
Lake Whitefish - Growth Changes OH-4/5 Mean age
Lake Whitefish - Growth Changes MH-1
Lake Whitefish - Condition Changes MH Year Weight in Kilograms 540 mm 500 mm 460 mm Mean Length
Lake Whitefish - Maturity Canadian Waters % Maturity
Lake Whitefish - Maturity Canadian Waters % maturity
Lake Whitefish - Total Mortality Age 5 WFH
Lake Whitefish - Total Mortality Age 9 WFH
Lake Whitefish - Synopsis Harvest targeted at lake whitefish - not normal Abundance peaked in mid 1990’s Strong year classes 1986 to 1991 Growth slowed significantly in past several years Condition declining Maturation has been curtailed Mortality decreasing over several years
Mary’s River Northshore.
Lake Herring - Recruitment Drummond Island Refuge
Lake Herring - Synopsis Little or no information Historical Saginaw Bay harvest non existent Strong year class 1994 Increasing abundance in northern regions Re-newed exploitation interests
S. main basin 1999 Harvest = 330,000 kg.
Deepwater Cisco - Recruitment Canadian Units Year class Inconsistent among units 1988 excellent all units poor main basin Increasing Georgian Bay
Deepwater Cisco - Condition MH-1
Deepwater Cisco - Abundance Canada - comml fishery
Deepwater Chub - Synopsis Harvest typical of historic Saginaw Bay replaced by Georgian Bay Strong year classes in Decreasing abundance in all regions Decreasing condition Water belly condition prevalent Concerns regarding above plus other diseases/parasites
main basin Canadian main basin Georgian Bay North Channel.
Round Whitefish - Synopsis Populations are Stable Underexploited Little Knowledge of Populations
Coregonine Summary - FCO Objectives uDiversity objective - met for 3 of 4 species unot being met for lake herring uHarvest objective - being exceeded uchub about right uwhitefish too much of total uround whitefish about right lake herring too little uLake herring objective - not being met in Saginaw Bay uDeepwater Cisco objective - not being met, probably can’t
Status of Coregonines in Lake Huron, 1999 Mark Ebener Chippewa
Status of Coregonines in Lake Huron, 1999 Mark Ebener Chippewa
PDF) Morphometric variation among spawning cisco aggregations in
Morphological and Ecological Differences Between Shallow- and Deep
Status of Coregonines in Lake Huron, 1999 Mark Ebener Chippewa
Mark EBENER, On-call emplotee
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