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Morphological variation in introduced Iberian pumpkinseeds

Vila-Gispert A., Fox M., Zamora L. & Moreno-Amich R. Journal of Fish Biology (2007) 71, 163–181


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)


•

7 internal measures (gill rakers and pharyngeal toothplate dimensions)

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

Maximum length (GRL1)

Distance between gill rakers 2 & 3 (DBGR2/3)

Maximum width (GRW1)

  


•

7 internal measures (gill rakers and pharyngeal toothplate dimensions)

Maximum length Maximum width

    Maximum width

Maximum length


Po

Multivariate analysis with 11 external measures 6

Banyoles Boadella Looncall Lit Looncall Pel Pozec reserv Ribaroja Susqueda

4

Catalonian waterbodies here

Axis 2

2

}

0

-2

Looncall ecomorphs here

-4

-6

-4

-2

0

2

4

6

Axis 1

shorter shorter more anterior

caudal peduncle pectoral fins prepectoral distance

longer longer more posterior


Regional differences in body and fin morphology: caudal peduncle length

Canada (Looncall Lake ecomorphs)

Catalonian reservoirs and lake Mean difference in peduncle length: • 17% dorsal • 19% ventral


DFA with 7 internal measures Populations

4

Banyoles Boadella

Benthic feeding populations greater

Looncall Lit Looncall Pel Pozec reserv Ribaroja

2

Axis 2

Susqueda

distance between gill rakers

0

-2

lesser

-4

-6

-4

-2

0

2

4

6

Axis 1

smaller

pharyngeal toothplate

larger

Zooplankton feeding populations

Molluscivory


Differences in feeding structures fit with prey consumption patterns: distance between gill rakers

zooplankton feeders macroinvertebrate 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


 

    


Invasive

Native

Functional differences


Invasive

Native

Functional differences


















   


            


            


      


      


Profile for Consorci de l'Estany

3_Plasticitat_Peix_sol_Anna_Vila_web1  

Vila-GispertA., Fox M., Zamora L. & Moreno-AmichR. Journal of FishBiology(2007) 71, 163–181 The pumpkinseed in Europe •Multiple introduc...

3_Plasticitat_Peix_sol_Anna_Vila_web1  

Vila-GispertA., Fox M., Zamora L. & Moreno-AmichR. Journal of FishBiology(2007) 71, 163–181 The pumpkinseed in Europe •Multiple introduc...

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