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Vila-Gispert A., Fox M., Zamora L. & Moreno-Amich R.

Journal of Fish Biology (2007) 71, 163–181

Morphological variation in introduced Iberian pumpkinseeds

The pumpkinseed in Europe

• Multiple introductions dating as far back as the late 1800’s

• Presently one of the most common non-native fishes in Europe

• Known occurrence in 28 European countries

• Wide range of habitats ….

Morphological differences between littoral and

pelagic forms

Littoral forms• gibbose body form• more posterior fin

placement• longer pectoral fins• fewer gill rakers, more

widely spaced

Pelagic forms• more fusiform body form• more anterior fin

placement• shorter pectoral fins• gill rakers more tightly

spaced on gill arch

MORPHOMETRIC MEASURES• 11 external morphological measures of functional significance

(body depth, fin size and location, caudal peduncle length and depth)

Maximum length (GRL1)

Maximum width (GRW1)

Distance between gill rakers 1 & 2 (DBGR1/2)





Distance between gill rakers 2 & 3 (DBGR2/3)Maximum length (GRL1)




























• 7 internal measures (gill rakers and pharyngeal toothplatedimensions)

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Maximumlength

Maximumwidth

MaximumlengthMaximum

width

• 7 internal measures (gill rakers and pharyngeal toothplatedimensions)

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Multivariate analysis with 11 external measures

shortershorter caudal peduncle caudal peduncle longerlongershortershorter pectoral fins pectoral fins longerlonger

moremore anterior anterior prepectoralprepectoral distancedistance moremore posteriorposterior

-6 -4 -2 0 2 4 6

Axis 1

-4

-2

0

2

4

6

Axi

s 2

Po

BanyolesBoadellaLooncall LitLooncall PelPozec reservRibarojaSusqueda

Catalonianwaterbodies

here } Looncallecomorphs

here

Regional differences in body and fin morphology: caudal peduncle length

Catalonian reservoirs and lake

Canada (Looncall Lake ecomorphs)

Mean difference in peduncle length: • 17% dorsal• 19% ventral

DFA with 7 internal measures

smaller pharyngeal toothplate larger

distance distance between gill between gill

rakersrakers

greatergreater

lesserlesser

-6 -4 -2 0 2 4 6

Axis 1

-4

-2

0

2

4

Axi

s 2

PopulationsBanyoles

Boadella

Looncall Lit

Looncall Pel

Pozec reserv

Ribaroja

Susqueda

Benthicfeeding

populations

Zooplanktonfeeding

populations

Molluscivory

Differences in feeding structuresfit with prey consumption patterns:

distance between gill rakers

macroinvertebratefeeders

zooplankton feeders

Mean difference in spacing: 49%

16-43% difference in pharyngeal toothplate dimensions between high and low mollusc feeding pops

Genetic & phenotypic plasticity experiments:

Catalan vs Canadian genotypes

Photos: Y. Bhagat

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Functional differences

NativeInvasive

Functional differences

NativeInvasive

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