my name is brian, and i like fish….. all kinds of fish……..(cheesy, i know)
DESCRIPTION
My name is Brian, and I like fish….. all kinds of fish……..(cheesy, I know). Adirondack Fishery Research Program, SE Adirondacks. Cornell Biological Field Station, Oneida Lake. Cornell University , Cayuga Lake. Lake Ontario, Embayments. Rangely Chain, Rapid River, ME. - PowerPoint PPT PresentationTRANSCRIPT
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My name is Brian, and I like fish…..
all kinds of fish……..(cheesy, I know)
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Lancaster, PA - Susquehanna River
Cornell University , Cayuga Lake
Cornell Biological Field Station, Oneida LakeAdirondack Fishery Research Program, SE Adirondacks
New York Harbor, 911 Dredging
Rangely Chain, Rapid River, ME
Lake Ontario, Embayments
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Native AdirondackFood Web
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Non-native AdirondackFood Web
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Master’s Thesis - Smallmouth Bass Removal
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Pumpkinseed* Creek* Common* White* Brook* Brown Central*Chub Shiner Sucker Trout Bullhead Mudminnow
0
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Sp
ring
CP
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(#
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12C
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Ratio of 13C to 12C
12C
12C12C
12C 13C
13C
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Algae Cell
12C
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13C12C
12C
735
19
FRACTIONATION
Water
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13C
12C
12C
12C
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Algae Cell
12C
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Zooplankton
13C
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Fish
Benthic Invertebrate
13C
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12C12C
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12C12C12C12C
13C
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13C13C
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Algae Cell
13C
12C
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13C
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13C
12C
12C
12C
12C
12C
12C
Algae Cell
12C
12C
12C
Zooplankton
13C
12C
12C
12C
12C
12C
12C
12C
12C
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Fish
Algae Cell Benthic Invertebrate
13C
12C
12C
12C
12C12C
12C12C
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13C13C
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12C 12C
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13C13C
?
?
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What carbon supports lake food webs….
In Lake Support = In Lake Support = AUTOCHTHONYAUTOCHTHONY
??
Dissolved CO2
CO2
Terrestrial Support = Terrestrial Support = ALLOCHTHONYALLOCHTHONY
Stable isotopes can label autochthonous productionStable isotopes can label autochthonous production
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June 7:Sure was hot todayJune8: Maybe I’ll cruise out to pelagic, see what Fox is eatingJune 9: Got away from that big
silver boat again last night, that makes it 3 weeks in a row
Challenges of studying fish..….can’t see where they go
….what temperature do they prefer?
….what stream did they come from?
….what were they eating yesterday or last month?
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Need a record of what a fish does or experiences...
….the OTOLITH
http://perso.club-internet.fr/jflhomme/otolithes/desc_otolithe.html
COMPOSITION
Calcium Carbonate (Aragonite)
And a Protein Matrix
FUNCTIONS
Hearing/Vibrations
Orientation
(Frustrating fisheries students)
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What’s so unique about them?
Bob Jones, Old Dominion University
Accrete “proportional” to fish growth Remain chemically
and isotopically inert
Minor and Trace Elements
sodium, strontium, sulfur, nitrogen, barium,
iron…..plus at least 2 dozen more
Major Elements
calcium, oxygen, carbon
δ18O
Water Temperature
? Otolith Carbon ?
FOODWATER
? ?
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If we could just measure a small enough sample…..enter in Dr. Valley and WISC-SIMS
Micro mill 30um
Ion Probe 3-4um
Cameca IMS-1280
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20062005200420032002
21
23
25
27
-22
-19
-16
-13
-10
0 250 500 750 1000 1250 1500 1750
Distance from origin (µm)
δ18O
δ13C
-22
-20
-18
-16
-14
-12
-10
21 23 25 27
δ13C
δ18O
A B
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My name is Matt…and I design “dry” suits
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This very classroom Milwaukee:
Beer Capitol
Appleton, WI (As written about in The Onion)
Here there be fishes
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What the…?!?
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The Great Lakes of Yore
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Great Lakes: Present Day
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Diary of a Mad Alewife
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60.62
3.64
1
10
100
Rock Sand
Substrate Type
Mea
n N
um
ber
of
Ale
wif
es
Co
llec
ted
F=8.75, p=0.007n=12 on each substrate.Bars=Stnd. Error
56.5
2.4
1
10
100
Rock Sand
Substrate Type
Mea
n N
um
ber
of
Mid
ges
C
oll
ecte
d
F=20.36, p < 0.001n=12 on each substrate.Bars=Stnd. Error.
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Alewife Diet by Substrate
0%
20%
40%
60%
80%
100%
Rock Sand
Substrate Type
Per
cen
t o
f S
tom
ach
s
Empty
Copepod
Amphipod
Terrestrial
Chironomid Adult
Chironomid Larve
Chironomid Pupae
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Effects of Dreissenid Mussels
Photos from Great Lakes WATER Institute website, U.S. Fish and Wildlife, and Kornis sketch.
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Help! I’m in the wrong Hemisphere!!!
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1990 1994 1996 1998 2000 2003
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• Invaders from Black and Caspian Seas• Multiple Spawning/Season• ~ 95% Hatch Rate• Zebra and Quagga Mussels as Prey• Facilitate Movement of Toxins
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When Gobies Attack…
• Very Aggressive– Competes with Native Sculpin for Habitat and
Spawning Sites– Eats fish eggs and larvae (Yellow Perch, SM Bass,
Lake Trout)
Result of Goby Attack.Ok…Not Really…
http://www.glwi.uwm.edu/people/jjanssen/goby/index.html
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