Scales of larval settlement in marine fishes and invertebrates Elizabeth Madin, Jenn Caselle and Robin Pelc 26 May 2005.

Scales of larval settlement in marine fishes and invertebrates

Elizabeth Madin, Jenn Caselle and Robin Pelc

26 May 2005

Outline

Objectives

Progress to date

Data

Planned work

Points for discussion

Outline

Objectives

Progress to date

Data

Planned work

Points for discussion

Objectives

1. Gather life history data to inform F3 model parameterization:a) fishesb) invertebrates

2. Use existing data to determine scales of decorrelation in larval settlement:a) spatial b) temporal

Outline

Objectives

Progress to date

Data

Planned work

Points for discussion

Progress to date

Objective 1:

Gather life history data to inform F3 model parameterization

Progress to date

Focal species:

- Kelp bass (Paralabrax clathratus)- Kelp rockfish (Sebates atrovirens)- Cabezon (Scorpaenichthys marmoratus)- Urchins (S. purpuratus; S. franciscanus)- Abalone (Haliotis rufescens)- Lobster (Panulirus spp.)

Progress to date:data gathered

• Larval PLD • Spawning season• Spawning character • Fecundity (# larvae/female)• Spawning cues/habitats• Precompetency period• Competency period• Larval dispersal locations • Natural mortality rate of adults (m)• Form(s) of density-dependence• Data sources

Progress to date:data gathered

• Habitat

• Duration of releases

• Realized dispersal distance

• Spatial scale of releases these data don’t seem to exist for most species relevant to F3

Progress to date

Objective 2:

Use existing data to determine scales of decorrelation in larval settlement

Progress to date

- Initial (de-)correlation analyses explored

- Some data quality and analytical issues need resolution

- Currently revising these analyses to allow for more reliable, robust conclusions

Outline

Objectives

Progress to date

Data

Planned work

Points for discussion

Data

1. PISCO SMURF settlement data

2. Other settlement datasets

Measuring fish recruitment: SMURFs

Kelp Bass

QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.

Yellowtail/Olive Rockfish

Copper Rockfish

Data: PISCO

Kelp Rockfish

QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.

Gopher/Black & Yellow RF

Sampling design

-2004

Raw data:

(small subset)

PISCO SMURF (ongoing)- Location: California- Species: Pacific fishes; some inverts

mean settlers

per SMURF

- per site

- per sampling period

- per species/

spp. group

Sum of KGBs SiteSample Period CumANA-LAND ANA-SOUTH ANA-WIN AQM ARCH CAM RCK CARP COJO

0 0 01 0 02 0 03 0 04 0 05 0 06 0 07 0 08 0 09 0 0

10 0 011 0 012 0 2 013 0 5.5 014 0 12 8.6666666715 0 2.33333333 19.333333316 0 0 017 0 0.33333333 018 0 0.33333333 019 0 0.33333333 020 0 0 021 0 0 022 0 0 023 0 0 024 0 0 025 0 0 026 0 0 027 0 0 028 0 0 029 0 0 0 030 0 0 0 031 0 0 0 032 0 0.66666667 1 033 0 0 0.33333333 034 0 0.33333333 0.33333333 035 0 0.33333333 0.5 036 0 0 0.5 037 0 0 0 038 0 0 0 039 0 0 0 3040 0 0 0 041 0 0 0 0 042 3.5 5 3.33333333 1.5 043 1.5 9 2.33333333 10 044 5 7.66666667 6.33333333 7 045 7.66666667 29 7 25.3333333 046 2.33333333 8 1.66666667 2 047 1 0 0 0 048 0 1.66666667 0.33333333 0 049 0 0 0 0 050 0 0 0 0 051 0 0 0 0 052 0 0 0 0 053 0 0 0 0 2454 0 0 0 0 055 0 0 0 0 0

(blank)Grand Total 0 22.3333333 85.8333333 21 28 30 45.8333333 24

Data: PISCO

Kelp Rockfish

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

CARPNAPLES

AQM

ANA-WINSCORP

PEL HAZ

SRI-CARRSMI-NORTHANA-SOUTH

VALLEYGULL

SRI-SOUTHSMI-SOUTH

Num/Smurf/Sample Period

20032004

NORTH (E-W)MAINLAND (E-W)

SOUTH (E-W)

Data: PISCO

Data

1. PISCO SMURF settlement data

2. Other settlement datasets

Data: Caffey (1985)

Location: Australia (NSW)Species: barnacles (Tesseropora rosea)

Data: Caffey (1985)

Settlement of Barnacles in NSW

0123456789

Oct-79Jan-80Apr-80Jul-80Oct-80Jan-81Apr-81Jul-81Oct-81Jan-82Apr-82

Date

Number of settlers

Scotts Head

Nobby's Head

Green Point

Cape Banks

Warden Head

Dolphin Pt.

Nundera Pt.

Data: Ebert et al. (1994)

D: Gaviota

E: Ellwood Pier

F: Stearn’s Wharf

G: Dana Point

H: SIO

I: Ocean Beach

Location: CaliforniaSpecies: urchins (Strongylocentrotus franciscanus and S. purpuratus)

Data: Ebert et al. (1994)

0

20

40

60

80

100

120

140

910111213141516171819202122232425262728293031323334353637383940414243444546474849505152532345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152532345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152531234567891011121314151617181920212223242526272829

1990 1991 1992 1993

Date

Number of Settlers

DANAPNT

GAVIOTA

OCNBCH

SBELL

SBSTWRF

SIO

sum purps

Year Week

Site

S. purpuratus settlement

Data: Ebert et al. (1994)

0

10

20

30

40

50

60

910111213141516171819202122232425262728293031323334353637383940414243444546474849505152532345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152532345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152531234567891011121314151617181920212223242526272829

1990 1991 1992 1993

Date

Number of Settlers

DANAPNT

GAVIOTA

OCNBCH

SBELL

SBSTWRF

SIO

red sums

Year Week

Site

S. franciscanus settlement

Data: Robertson (unpub’d)

Location: Panama (San Blas Archipelago)Species: Ocean surgeon (Acanthurus bahianus)

Outline

Objectives

Progress to date

Data

Planned work

Points for discussion

Planned work

Incorporate new data:

- Latest (2004) PISCO data

- Other datasets (if possible) (Gaylord; VanTresca; Roberston)

Planned work

New analyses:

- More robust (de-)correlation analyses

- Apply spatial statistical techniques

(e.g., semivariograms/covariograms, kriging(?))

Planned work: Spatial stats

Planned work

Further data exploration: - analogous analyses for SST data

- partitioning PISCO dataset by year (i.e., to filter out interannual variation)

- prewhitening (i.e., to filter out large scale climatic variation)

- examine potential larval/oceanographic interactions (spatial; temporal)

Planned work

Comparison with results of related studies:

- Myers et al. (1997)

settlement decorrelation (fishes); global

- Field and Ralston (in review)settlement decorrelation (fishes); west coast

- Broitman et al. (in press) recruitment variability (intertidal inverts); SCI

Outline

Objectives

Progress to date

Data

Planned work

Points for discussion

Points for discussion

- Calculation of ‘non-linear’ PISCO pairwise site distances:

- weighting by current/flow data?

- other methods?

- Suggestions of other useful analyses?

Conclusion

- PLD and other life history characteristics may influence the scales of spatial and temporal decorrelation in larval settlement

- Spatial decorrelation plots may inform the probability distribution (kernel) of larval dispersal in specific regions

Scales of larval settlement in marine fishes and invertebrates

Elizabeth Madin, Jenn Caselle and Robin Pelc

26 May, 2005