My name is Brian, and I like fish…..

all kinds of fish……..(cheesy, I know)

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

Native AdirondackFood Web

Non-native AdirondackFood Web

Master’s Thesis - Smallmouth Bass Removal

Pumpkinseed* Creek* Common* White* Brook* Brown Central*Chub Shiner Sucker Trout Bullhead Mudminnow

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ring

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r)

12C

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Ratio of 13C to 12C

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12C12C

12C 13C

13C

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12C12C

13C

12C

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12C

12C

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12C

Algae Cell

12C

12C

12C

13C12C

12C

735

19

FRACTIONATION

Water

13C

12C

12C

12C

12C

12C

12C

Algae Cell

12C

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12C

Zooplankton

13C

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12C

12C

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12C

12C

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13C

12C

12C12C

12C

12C 12C

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Fish

Benthic Invertebrate

13C

12C

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12C12C12C12C

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Algae Cell

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Algae Cell

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Zooplankton

13C

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Fish

Algae Cell Benthic Invertebrate

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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

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?

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)

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

? ?

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

20062005200420032002

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27

-22

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-13

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0 250 500 750 1000 1250 1500 1750

Distance from origin (µm)

δ18O

δ13C

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δ13C

δ18O

A B

My name is Matt…and I design “dry” suits

This very classroom Milwaukee:

Beer Capitol

Appleton, WI (As written about in The Onion)

Here there be fishes

http://lawrence.facebook.com/photo.php?pid=30032182&id=49200189&op=1&view=user&subj=49200189

What the…?!?

The Great Lakes of Yore

Great Lakes: Present Day

Diary of a Mad Alewife

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.

Alewife Diet by Substrate

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100%

Rock Sand

Substrate Type

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cen

t o

f S

tom

ach

s

Empty

Copepod

Amphipod

Terrestrial

Chironomid Adult

Chironomid Larve

Chironomid Pupae

Effects of Dreissenid Mussels

Photos from Great Lakes WATER Institute website, U.S. Fish and Wildlife, and Kornis sketch.

Help! I’m in the wrong Hemisphere!!!

1990 1994 1996 1998 2000 2003

• Invaders from Black and Caspian Seas• Multiple Spawning/Season• ~ 95% Hatch Rate• Zebra and Quagga Mussels as Prey• Facilitate Movement of Toxins

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