Opis deformacija glave šarana (Cyprinus carpio Linnaeus, 1758).

Head deformities in cultured fish reduce their growth rate and survival, as well as degrading their external morphology, all of which can lead to considerable economic losses. While spinal deformities in cultured common carp have been analyzed in detail, relatively little is known about the prevalence, types or causes of head deformities. The aim of this study was to determine the prevalence of head bone deformities in 52 common carp, aged 2 years old, with spinal disorders from a farm in Croatia. Deformities were detected by clinical analysis, followed by detailed bone analysis, using X-rays and stereomicroscopy. Of the 52 fish, 8 (15.4 %) were found to have head deformities. Most deformities were bilateral and primarily affected the jaw arch and opercular string bone. Genetics and mechanical stress are proposed as possible causes of these deformities.Deformacije glave u uzgajanih riba smanjuju njihov rast i preživljavanje te narušavaju vanjski izgled što dovodi do znatnih ekonomskih gubitaka. Deformacije kralježnice uzgajanog šarana istražene su vrlo detaljno dok se o učestalosti, vrsti ili uzrocima deformacija glave malo zna. Cilj ovog istraživanja bio je utvrditi prevalenciju deformacija glave u 52 dvogodišnja šarana s jednog ribnjačarstva u Hrvatskoj kojima su utvrđene deformacije kralježnice. Deformacije su otkrivene kliničkim pregledom te istražene rendgenološki i uz pomoć lupe. Od 52 šarana 8 (15,4 %) ih je imalo i deformacije glave. Većina deformacija je bilateralna, a najčešće su bile zahvaćene kosti čeljusnog luka i operkularnog niza. Genetska predispozicija i mehaničko djelovanje navedeni su kao mogući uzroci utvrđenih promjena