The morphological diversity of Garra barreimiae

Arthur Pichler; Harald Ahnelt; Sandra Kirchner; Helmut Sattmann; Elisabeth Haring; Stephan Handschuh; Jörg Freyhof; Reginald Victor; Luise Kruckenhauser - Central Research Laboratories, Laboratory of Molecular Systematics, Museum of Natural History Vienna; Department of Integrative ZoologyUniversity of Vienna; Department of Theoretical Biology University of Vienna; 1st Zoological Department, Museum of Natural History Vienna; 3rd Zoological Department, Museum of Natural History ViennaViennaAustria; VetImaging, VetCore Facility for Research University of Veterinary Medicine Vienna (Vienna Austria); Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB)BerlinGermany; Department of BiologySultan Qaboos University Muscat Oman

Garra barreimiae (Fowler and Steinitz, Bull Res Counc Isr 5B:262–289, 1956) is a freshwater fish that lives throughout the Hajar Mountains of Oman and the United Arab Emirates. Previously, four different genetic clades (West clade, Central Clade, North clade and East clade) have been identified within this species. This study observes morphological differences between these clades using morphometrics and meristics as well as micro CT imaging, further strengthening the assumption that the taxon of G. barreimiae should be restricted to one of the genetic clades detected. Although many morphometric and meristic characteristics are highly variable within the clades, the West clade fits the original description of G. barreimiae and is distinguishable by its higher number of fifteen to seventeen gill rakers on the lower limb of the first gill arch (compared to the other clades with ten to fourteen gill rakers), its seven branched pelvic fin rays (in contrary to the other clades with eight branched pelvic fin rays) and its number of vertebrae, with typically nineteen precaudal and one intermediate vertebrae, compared to eighteen precaudal and two intermediate vertebrae in the Central and North clade and seventeen precaudal and two intermediate vertebrae in the East clade.

How Amira-Avizo Software is used

Image processing and analysis was done using Amira 6.