Morphological characteristics of molecularly identified intergeneric hybrids of Gobio and Romanogobio gudgeons

0374950 - ÚBO 2012 SK eng A - Abstract
Nowak, M. - Mendel, Jan - Popek, W.
Morphological characteristics of molecularly identified intergeneric hybrids of Gobio and Romanogobio gudgeons.
1st International Conference on Fish Diversity of Carpathians: book of abstracts. Stará Lesná: Institute of Zoology SAS, 2011. s. 24. ISBN 978-80-970326-1-6.
[International Conference on Fish Diversity of Carpathians /1./. 22.09.2011-23.09.2011, Stará Lesná]
R&D Projects: GA ČR GP206/09/P608
Institutional research plan: CEZ:AV0Z60930519
Keywords : Romanogobio * Gobio * hybrid
Subject RIV: EG - Zoology

Hybridisation is a very frequent phenomenon among the European gudgeons. Despite that identification in the field, especially of smaller individuals (< 50 mm SL) is considered rather difficult, several morphological characters allow distinction between “pure” Gobio or Romanogobio species and their hybrids. Probably the most striking is colour pattern on the caudal fin – in hybrids the fin is usually notably spotted (similarly to Gobio spp.), but the spots are regularly arranged, forming nearly V-shaped pattern (unique to Romanogobio spp.). Epidermal crest on the dorsal scales, characteristic to Romanogobio, in hybrids is usually absent or restricted only to mid-dorsal line of scales. Also the shape of the body is mediate – more slender than in Gobio, but notably deeper than in Romanogobio. In very small individuals the most effective character is the position of a dark blotch on the dorsum.
Permanent Link: http://hdl.handle.net/11104/0207744