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Condition of coral reef fish larvae along the Florida Keys shelf: Martha J. Hauff, Su Sponaugle, Robert K. Cowen Rosenstiel School of Marine and Atmospheric Science University of Miami Implications for connectivity

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Page 1: Condition of coral reef fish larvae along the Florida Keys ......Condition of coral reef fish larvae along the Florida Keys shelf: Martha J. Hauff, Su Sponaugle, Robert K. Cowen

Condition of coral reef fish larvae along the Florida Keys shelf:

Martha J. Hauff, Su Sponaugle, Robert K. CowenRosenstiel School of Marine and Atmospheric Science

University of Miami

Implications for connectivity

Page 2: Condition of coral reef fish larvae along the Florida Keys ......Condition of coral reef fish larvae along the Florida Keys shelf: Martha J. Hauff, Su Sponaugle, Robert K. Cowen

Are reef fish populations open or closed?

Local Retention Panmixia

?

Page 3: Condition of coral reef fish larvae along the Florida Keys ......Condition of coral reef fish larvae along the Florida Keys shelf: Martha J. Hauff, Su Sponaugle, Robert K. Cowen

Larval condition affects:

• Larval survival

• Juvenile survival

• Population connectivity

So . . .

. . . Do larvae with different

dispersal histories have

different condition?

Page 4: Condition of coral reef fish larvae along the Florida Keys ......Condition of coral reef fish larvae along the Florida Keys shelf: Martha J. Hauff, Su Sponaugle, Robert K. Cowen

Three 18-day cruises on R/V Walton Smith June 2007 and August 2007, July 2008

Sampling Logistics

Paired MOCNESS and paired frame netSample discrete 20m depth bins (0-20, 20-40, 40-60, 60-80m)

Larvae sorted onboardTarget species cursorily identified and flash frozen

Environmental Data CollectionCTD

ADCP

Fluorescence

Transmittance

Dissolved oxygen

ARGOS drifters

Satellite imagery (SSH, ocean color)

Page 5: Condition of coral reef fish larvae along the Florida Keys ......Condition of coral reef fish larvae along the Florida Keys shelf: Martha J. Hauff, Su Sponaugle, Robert K. Cowen

Key Largo

Big Pine Key

FLORIDA

Loop Current

Sampling Scheme

Marquesas

Long Key

Page 6: Condition of coral reef fish larvae along the Florida Keys ......Condition of coral reef fish larvae along the Florida Keys shelf: Martha J. Hauff, Su Sponaugle, Robert K. Cowen

Measuring Condition

• ID and measure individual larvae, remove heads and guts and homogenize

• Use fluorometry to determine RNA/DNA

Clemmesen 1996

Page 7: Condition of coral reef fish larvae along the Florida Keys ......Condition of coral reef fish larvae along the Florida Keys shelf: Martha J. Hauff, Su Sponaugle, Robert K. Cowen

Thalassoma bifasciatumBluehead wrasse

Pseudogramma gregoryiReef bass

Sphyraena barracudaGreat barracuda

Xyrichtys spp.Razorfish (pearly, rosy, green)

Page 8: Condition of coral reef fish larvae along the Florida Keys ......Condition of coral reef fish larvae along the Florida Keys shelf: Martha J. Hauff, Su Sponaugle, Robert K. Cowen

Nearshore vs. Offshore Condition Thalassoma bifasciatum

a

b

Page 9: Condition of coral reef fish larvae along the Florida Keys ......Condition of coral reef fish larvae along the Florida Keys shelf: Martha J. Hauff, Su Sponaugle, Robert K. Cowen

Nearshore vs. Offshore Condition Xyrichtys spp.

a

b

Page 10: Condition of coral reef fish larvae along the Florida Keys ......Condition of coral reef fish larvae along the Florida Keys shelf: Martha J. Hauff, Su Sponaugle, Robert K. Cowen

Nearshore vs. Offshore Condition Pseudogramma gregoryi

Page 11: Condition of coral reef fish larvae along the Florida Keys ......Condition of coral reef fish larvae along the Florida Keys shelf: Martha J. Hauff, Su Sponaugle, Robert K. Cowen

Nearshore vs. Offshore Condition Sphyraena barracuda

Page 12: Condition of coral reef fish larvae along the Florida Keys ......Condition of coral reef fish larvae along the Florida Keys shelf: Martha J. Hauff, Su Sponaugle, Robert K. Cowen

Condition Among Transects

a

babab

ab

Page 13: Condition of coral reef fish larvae along the Florida Keys ......Condition of coral reef fish larvae along the Florida Keys shelf: Martha J. Hauff, Su Sponaugle, Robert K. Cowen

Temporal Variability

27-29°C

28-30°C

28-31°C

a a

b

Page 14: Condition of coral reef fish larvae along the Florida Keys ......Condition of coral reef fish larvae along the Florida Keys shelf: Martha J. Hauff, Su Sponaugle, Robert K. Cowen

Condition vs. Plankton Abundance

Page 15: Condition of coral reef fish larvae along the Florida Keys ......Condition of coral reef fish larvae along the Florida Keys shelf: Martha J. Hauff, Su Sponaugle, Robert K. Cowen

Sponaugle et al. 2009

Page 16: Condition of coral reef fish larvae along the Florida Keys ......Condition of coral reef fish larvae along the Florida Keys shelf: Martha J. Hauff, Su Sponaugle, Robert K. Cowen

SPECIFIC PREY ABUNDANCES

OTOLITH-DERIVED GROWTH DATA

BIOPHYSICAL MODELING

GUT CONTENTS

RNA/DNA

Page 17: Condition of coral reef fish larvae along the Florida Keys ......Condition of coral reef fish larvae along the Florida Keys shelf: Martha J. Hauff, Su Sponaugle, Robert K. Cowen

Conclusions

Lower condition in offshore larvae

Lower larval condition in Loop Current and off of Key Largo, higher larval condition off of the

middle and lower Keys

Higher condition in 2008 than 2007

Larval dispersal trajectory may affect condition and thus, patterns of population replenishment

Page 18: Condition of coral reef fish larvae along the Florida Keys ......Condition of coral reef fish larvae along the Florida Keys shelf: Martha J. Hauff, Su Sponaugle, Robert K. Cowen

Joel Llopiz

Laura Parsons

Katie Shulzitski

Claire Paris

Margie Oleksiak

Doug Crawford

Cedric Guigand

Claire Paris

Evan D’Alessandro

Dave Richardson

Adam Greer

Joan Holt

Danielle McDonald

Andy Bakun

Carie BicksonTom Murphy

Jason Downing

Capt. Shawn Lake and the crew of the

R/V F.G. Walton Smith

Rowlands Fellowship

Thank You:

Page 19: Condition of coral reef fish larvae along the Florida Keys ......Condition of coral reef fish larvae along the Florida Keys shelf: Martha J. Hauff, Su Sponaugle, Robert K. Cowen

Searcy and Sponaugle 2001

Page 20: Condition of coral reef fish larvae along the Florida Keys ......Condition of coral reef fish larvae along the Florida Keys shelf: Martha J. Hauff, Su Sponaugle, Robert K. Cowen

Cluster Analysis (June 2007)

N4

N5N6

O7

N14

N15

O18

N25

N26

O27

O28

N35

N36

O37

O38

N45

N46

O47

O49

N55N56

O57

O58O59

N64

N66

O67

O68O69

N74N75

N76

O77O78

O79

O80

O80A

O81O82

O83

O84

O90

O91

O92

O93

O94

O95

Z2Z3

Z4

Z5Z6

Z7

Z8

Z9

Z10

Z11

Z12

Z13

Z14

Z15Z16

Z17

Z18

Z19

Z20

Z21Z22

Z23

Z24

Z25

Z26

Z27

Z28

Z29Z30

Z31Z32Z33

Z34

Z35

Z36

Z37

Similarity (%)100 9698 9799

Page 21: Condition of coral reef fish larvae along the Florida Keys ......Condition of coral reef fish larvae along the Florida Keys shelf: Martha J. Hauff, Su Sponaugle, Robert K. Cowen

Next Steps

o Analyze additional taxa• Data for five other taxa, and many more samples from

all three cruiseso Look at R/D ratio in relation to other environmental

variables • Prey field• Multivariate environmental analysis• Gut contents

o Compare R/D to other indices of condition• Growth rates (otoliths)• Lipid components analysis (TAG:Sterol)o Look at condition in relation to modeled larval origins

Page 22: Condition of coral reef fish larvae along the Florida Keys ......Condition of coral reef fish larvae along the Florida Keys shelf: Martha J. Hauff, Su Sponaugle, Robert K. Cowen

Cluster Analysis (August 2007)

N4

N5

N6O7

O8O9

N14N15N16

O17

O18

O19

N24

N26

O27

O28

O29

N34N35N36

O37

O38

O39

N44

N45

N46

O47

O48

O49

N54

N55

N56

O57

O58

O59

N64

N65

N66

O67

O68

N74

N75

N76

O77

O78O79

O80O81

O82O83O85O86

O90

O91O92

O93

O94

O95

O96

X1X2

X3

X4

X5

X6

X7X8

X9

X10

X11

X12

X13

X14

X16

X17

X19X20X21

Similarity (%)100 9698 9799

Page 23: Condition of coral reef fish larvae along the Florida Keys ......Condition of coral reef fish larvae along the Florida Keys shelf: Martha J. Hauff, Su Sponaugle, Robert K. Cowen
Page 24: Condition of coral reef fish larvae along the Florida Keys ......Condition of coral reef fish larvae along the Florida Keys shelf: Martha J. Hauff, Su Sponaugle, Robert K. Cowen
Page 25: Condition of coral reef fish larvae along the Florida Keys ......Condition of coral reef fish larvae along the Florida Keys shelf: Martha J. Hauff, Su Sponaugle, Robert K. Cowen
Page 26: Condition of coral reef fish larvae along the Florida Keys ......Condition of coral reef fish larvae along the Florida Keys shelf: Martha J. Hauff, Su Sponaugle, Robert K. Cowen

Environmental Data Collection

CTD

ADCP

Fluorescence

Transmittance

Dissolved oxygen

ARGOS drifters

Satellite imagery

(SSH, ocean color)

Page 27: Condition of coral reef fish larvae along the Florida Keys ......Condition of coral reef fish larvae along the Florida Keys shelf: Martha J. Hauff, Su Sponaugle, Robert K. Cowen

Are reef fish populations open or closed?

Local Retention Panmixia

?Adult SpawningLarval Behavior/Swimming Ability

Larval MortalityPhysical Processes

Page 28: Condition of coral reef fish larvae along the Florida Keys ......Condition of coral reef fish larvae along the Florida Keys shelf: Martha J. Hauff, Su Sponaugle, Robert K. Cowen

LC

FC

YUC

CUB

Gulf of Mexico

GS

TG


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