|Cytogenetics of the bathydraconid fish Gymnodraco acuticeps (Perciformes, Notothenioidei) from Terra Nova Bay, Ross Sea|
|Pisano, E.; Mazzei, F.; Derome, N.; Ozouf-Costaz, C.; Hureau, J.-C.; di Prisco, G. (2001). Cytogenetics of the bathydraconid fish Gymnodraco acuticeps (Perciformes, Notothenioidei) from Terra Nova Bay, Ross Sea. Polar Biol. 24(11): 846-852. dx.doi.org/10.1007/s003000100291|
|In: Polar Biology. Springer-Verlag: Berlin. ISSN 0722-4060, more|
Cytogenetics; Cytology; Evolution; Fish; Genetics; Karyotypes; Marine environment; Gymnodraco acuticeps Boulenger, 1902 [WoRMS]; PS, Ross Sea [gazetteer]; Marine
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In the framework of the I.C.E.FISH (International Collaborative Effort on Antarctic Fish Adaptive Evolution) project, during the 1998-1999 season at the Italian shore-based Terra Nova Bay Station, the broad fields of adaptation and evolution of the fish suborder Notothenioidei were tackled through the integration of many disciplines. As a representative contribution of I.C.E.FISH, a cytogenetic study of the bathydraconid fish Gymnodraco acuticeps is reported. The Bathydraconidae is a heterogeneous notothenioid taxon whose intra-family relationships are very uncertain. The conventional karyotype and the location of nuclear ribosomal genes, by means of fluorescence in situ hybridisation, contributed to species-specific characterisation and provided the basis for comparative analyses. The karyotype of G. acuticeps consists of 48 chromosomes (2 metacentric, 2 submetacentric and 44 acrocentric); major ribosomal cistrons correspond to a large region in a single chromosome pair. Mapping of the available karyotypic data on a molecular phylogenetic tree provided information on chromosomal diversification during the cladogenesis of the bathydraconids.