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European Eels ... the Story of their (tough) Life

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Auteurs

  • Dominique Adriaens
  • Jens De Meyer
  • Joachim Christiaens
  • Van Wassenbergh Sam
  • Anthony Herrel
  • Jonna Tomkiewicz
  • Peter Lauesen
  • Gregory Maes
  • Ron Dirks
  • Pascal Boeckx
  • Lieven Bervoets
  • Adrian Covaci
  • Govindan Malarvannan
  • Akihiro Okamura
  • Jelle Dhaene
  • Luc Van Hoorebeke
  • Barbara De Kegel

Afdelingen, onderzoeksgroepen en diensten

Details

Originele taal-2Engels
TitelAbstracts The Joint Meeting of Ichthyologists and Herpetologists, Austin 2017
Aantal pagina's2
Plaats productieAustin Texas
Publicatiedatum11-mei-2017
Artikel nummer0015
StatusGepubliceerd - 11-mei-2017
Event2017 Joint Meeting of Ichthyologists and Herpetologists. - Austin (Texas), Austin, Verenigde Staten van Amerika
Duur: 12-jul-201716-jul-2017
http://conferences.k-state.edu/JMIH-Austin-2017/

Abstract

Several species of Anguilla eels are known for their spectacular life history, with a cross Atlantic migration as they undergo their ontogenetic transformations. Confronted with all kind of challenges, including the one having to catch prey, European eels start as non-feeding preleptocephalus larvae. At early feeding, they are equipped with a seemingly poorly functional jaw system that supports odd-ball teeth. Once they reach the glass eel stage, migration starts up-river and phenotypic transformation starts towards the yellow eel phenotype. During this phase, a trophic segregation starts to emerge that is reflected in a divergent phenotype of broad- versus narrowheaded morphs. If everything goes well, they finally transform into silver eels that stop feeding and spend the rest of their life swimming and spawning, until death do them part. In this presentation, an overview is given of structural and functional challenges preleptocephali undergo with their protruding teeth and poorly ossified jaws. The implications of the divergent head phenotypes on feeding performance is discussed, linking it to genetically directed scenarios underlying this pattern. Mapping that ontotrophic ecology and pollution levels, suggests possible consequences on the closing of their life cycle.

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