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Biodiversity of Arctic fishes: first karyological information on Gaidropsarus argentatus (Reinhardt, 1837), a new piece to the puzzle
Ghigliotti, L.; Christiansen, J.S.; Fevolden, S.-E.; Pisano, E. (2012). Biodiversity of Arctic fishes: first karyological information on Gaidropsarus argentatus (Reinhardt, 1837), a new piece to the puzzle. Mar. Biol. Res. 8(10): 1032-1035. http://dx.doi.org/10.1080/17451000.2012.708419
In: Marine Biology Research. Taylor & Francis: Oslo; Basingstoke. ISSN 1745-1000; e-ISSN 1745-1019
Peer reviewed article  
Beschikbaar in  Auteurs 
Trefwoorden
    Biodiversity
    Fauna > Aquatic organisms > Aquatic animals > Fish
    Karyotypes
    PN, Arctic
    Gaidropsarus argentatus (Reinhardt, 1837) [WoRMS]
    Arctisch [Marine Regions]
    Marien/Kust
Author keywords
    Arctic rockling
Auteurs  Top 
  • Ghigliotti, L.
  • Christiansen, J.S.
  • Fevolden, S.-E.
  • Pisano, E.
Abstract
    Here we provide the first karyological characterization of the Arctic gadoid fish Gaidropsarus argentatus (Arctic rockling), through conventional and molecular cytogenetics. The analysis of six specimens collected along the coasts of Greenland during TUNU-MAFIG (Marine Fishes of North East Greenland – diversity and adaptation) expeditions, consistently indicated 48 chromosomes, with the karyotypic formula 12 m/sm+36 st/t and Fundamental Number (FN)=60. The description of the species-specific karyotype for a fish living in Arctic marine waters per se adds a significant piece of information to the necessary biological baseline for monitoring of biodiversity changes in polar regions. In addition, comparison of our data on the Arctic G. argentatus with those of the Mediterranean co-generic G. mediterraneus revealed a surprisingly high level of cytogenetic diversity between the two species (2n=48 vs. 2n=28), laying the basis for future analyses aimed at tracing the chromosomal evolution and diversification within this geographically widespread genus.
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