Michigan Department of Education Competitive Grant Evaluation of
Dan O’Keefe, Ph.D. - Ottawa County · 2013-11-27 · Dan O’Keefe, Ph.D. Michigan Sea Grant ....
Transcript of Dan O’Keefe, Ph.D. - Ottawa County · 2013-11-27 · Dan O’Keefe, Ph.D. Michigan Sea Grant ....
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Dan O’Keefe, Ph.D. Michigan Sea Grant
MSU Extension
November 25, 2013
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Overview Asian carp update
Invaders on the horizon
Grand River fish in 2013
Bighead carp caught by Illinois River commercial fishermen (INHS Photo)
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Asian carp species prohibited in Michigan
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Asian Carp Two filter feeding species in Chicago
Bighead Carp Silver Carp
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Silver Carp
Bighead Carp
Gill Rakers for Filter Feeding
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Asian Carp Two species that do not filter feed
Grass Carp Black Carp
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Grass Carp
- Consumes huge quantities of aquatic plants (100 lbs/day)
- Can severely impact fish and wildlife habitat
- Feeds on desirable plants and not nuisance plants
- Can lead to nuisance algae blooms (digests <50% of food)
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Grass Carp
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Silver Carp
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Silver Carp eDNA
2009 eDNA
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2012 eDNA
2013 eNA
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Eradication: Complete removal of an exotic species
Control: Long term management of exotic
species to reduce (not eliminate!) harm
AQUATIC SPECIES INVASION TIMELINE
CO
NTR
OL C
OST
S →
ARE
A IN
FEST
ED →
TIME →
MULTIPLE INTRODUCTIONS
ESTABLISHED LOCAL
POPULATION
POPULATIONS IN MANY HABITATS
ESTABLISHED THROUGHOUT GREAT LAKES
AND TRIBUTARIES
ERADICATION POSSIBLE (for some species)
ERADICATION IMPOSSIBLE (partial control is only option)
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Can Asian carp reproduce in Great Lakes?
According to the literature...
• Temperature: >64° F
• Rise in water level or turbidity
• >60 miles of free-flowing river upstream of lake/bayou
• Some exceptions noted…
Silver carp ~ 240 hours
Large, warm rivers with abundant backwaters and few dams provide habitat
for all life stages of carp.
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Kolar et al. (2005)
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New Findings on Asian Carp Reproduction
• Temperature affects length of river needed (USGS 2013)
• Rise in water level may not be needed (Goforth et al. 2013)
• Wabash River, IN, smallest known spawning river
• Grass carp have spawned in 14 miles of Sandusky R.
Silver carp ~ 240 hours
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Observed Spawning
activity
Adult Population Front Distances from Lake Michigan 37 miles Dispersal barriers
55 miles Adult Population Front
62 miles Presence of Adults/Potential Spawning
62 miles Verified Spawning
Areas of Concern 1) Verified Spawning Marseilles Pool 2) Verified Identification of AC eggs and larvae near Henry Illinois
Characterizing Risk 2013
ACRCC slide
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Asian carp markets Domestic markets
Live bighead carp get best price Large frozen bigheads and silvers
Chinese export markets Mostly large bighead carp Heads prized for soup ~30 million pounds/year
Big River Fish Co. photo
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Results of Illinois River population modeling… Bigheads are likely to be more vulnerable to decline
than silvers… Bigheads make up 90% of commercial catch Silvers make up 74% of population
0.5 0.6 0.7 0.8 0.9
0.0
0.5
1.0
1.5
2.0
2.5
Silver carp
0.5 0.6 0.7 0.8 0.9
Bighead carp
0.5 0.6 0.7 0.8 0.9
eql75% of eql50% of eql
Aggregate
Explotation rate
Prop
ortio
nP
ropo
rtion
of i
nitia
l pop
ulat
ion
at e
nd o
f sim
ulat
ion
Slide adapted from Brian Roth, MSU
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Even at high harvest (u = 0.9), aggregate Asian carp populations won’t disappear if you harvest only adults or only juveniles
But if you harvest both…
5 10 15 20 25
050
010
0015
0020
00 u = Se
5 10 15 20 25
050
010
0015
0020
00 u Se
5 10 15 20 25
050
010
0015
0020
00 u Se
Simulation year
Bio
mas
s (m
t)
Slide adapted from Brian Roth, MSU
Results of Illinois River population modeling…
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Great Lakes Spotted Muskellunge
(a.k.a. Muskie)
Top predator native to west MI
Extirpated in many habitats
Fall 2013 stocking - 2,670 Lk. Macatawa
- 3,000 Grand River - 3,857 White Lake - 6,876 Muskegon Lake - 1,043 Mona Lake
Lake St. Clair is widely regarded as the world’s best muskie fishery.
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Kyle Anderson Sept. 27, 2009, Torch Lake
50 pounds, 8 ounces
Joseph Seeberger October 13, 2012, Lake Bellaire
58 pounds; 59 inches
Michigan’s Record Muskie
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Alewife
Young Gizzard Shad
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ALEWIFE
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Acknowledgements Dr. Brian Roth, MSU Kevin Irons, INHS Big River Fish Co. Phil Moy, WISG Jim Bredin, ACRCC Lynn Vaccaro, MISG
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www.miseagrant.umich.edu/news/sw
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Visit Michigan Sea Grant YouTube Channel!