"1"^^ . . . . "Neuvedeno."@en . . "0"^^ . . . "0"^^ . . . . "GA206/01/0586" . . "Occurence and biological consequences of hermaphroditism in the barbel Barbus barbus"@en . . . . . . "8"^^ . . . "2008-05-19+02:00"^^ . "Several interesting features were found during foregoing applicant's investigations of the barbel, Barbus barbus, e.g.: high predominance of males compared with females especially in the smaller size classes and younger age categories, and vice versa, almost the absolute female predominance in larger and older categories. Contemporally also an occurrence of intersexual individuals was registered, with morphological and histological signs suggesting undergoing process of sex reversal. Similar phenomenaboth of the protandric and protogynic sense, are relatively well known in many species and families of marine, as well as of tropical live-bearing fishes. Despite numerous intersexual specimens described in literature, in freshwater fishes of temperate zone the background and biological significance of these phenomena, in our opinion, were not studied adequately. The hypothese was pronounced by applicants, that the sex reversal as a natural phenomenon may under certain circumstances exist m the barbel"@en . "Byl prok\u00E1z\u00E1n protandrick\u00FD pohlavn\u00ED zvrat a intersexualita ve sledovan\u00E9 populaci Barbus barbus, jejich\u017E vz\u00E1cn\u00FD v\u00FDskyt v\u0161ak nem\u016F\u017Ee vysv\u011Btlit evidentn\u00ED asymetrii v pom\u011Bru pohlav\u00ED a ve v\u011Bkov\u00E9 a velikostn\u00ED struktu\u0159e populace. Jedn\u00E1 se z\u0159ejm\u011B o anom\u00E1lii, kter\u00E1"@cs . "8"^^ . "http://www.isvav.cz/projectDetail.do?rowId=GA206/01/0586"^^ . "P\u0159i d\u0159\u00EDv\u011Bj\u0161\u00EDch v\u00FDzkumech parmy obecn\u00E9 bylo navrhovatelem tohoto projektu zji\u0161t\u011Bno n\u011Bkolik zaj\u00EDmav\u00FDch a u jin\u00FDch druh\u016F na\u0161\u00ED fauny ryb neobvykl\u00FDch rys\u016F popula\u010Dn\u00ED struktury jako nap\u0159. vysok\u00E1 po\u010Detn\u00ED p\u0159evaha samc\u016F nad samicemi a to zvl\u00E1\u0161t\u011B v\u00FDrazn\u011B v ni\u017E\u0161\u00EDch velikostn\u00EDch skupin\u00E1ch a mlad\u0161\u00EDch v\u011Bkov\u00FDch t\u0159\u00EDd\u00E1ch a naopak postupn\u011B s v\u011Bkem a velikost\u00ED se zvy\u0161uj\u00EDc\u00ED a\u017E posl\u00E9ze absolutn\u00ED p\u0159evaha samic. Sou\u010Dasn\u011B byl zji\u0161t\u011Bn i v\u00FDskyt intersexu\u00E1ln\u00EDch jedinc\u016F s morfologickou a histologickou stavbou gon\u00E1d nasv\u011Bd\u010Duj\u00EDc\u00ED existenci procesu zvratu pohlav\u00ED. Tento jev, a to jak v protogynick\u00E9m tak i protandrick\u00E9m sm\u011Bru, je pom\u011Brn\u011B dob\u0159e zn\u00E1m u \u0159ady mo\u0159sk\u00FDch druh\u016F a \u010Deled\u00ED d\u00E1le i u sladkovodn\u00EDch \u017Eivorodek z tropick\u00E9 oblasti. Zat\u00EDm dle na\u0161eho soudu nedostate\u010Dn\u011B je tento jev zn\u00E1m u sladkovodn\u00EDch ryb m\u00EDrn\u00E9ho p\u00E1sma a to p\u0159es ji\u017E dosti po\u010Detn\u00E9 n\u00E1lezy intersexu\u00E1ln\u00EDch jedinc\u016F, je\u017E jsou hodnoceny sp\u00ED\u0161e jako morfologick\u00E9 anom\u00E1lie. Navrhovatel\u00E9 vyslovuj\u00ED hypot\u00E9zu, \u017Ee za ur\u010Dit\u00FDch okolnost\u00ED m\u016F\u017Ee v p\u0159\u00EDpad\u011B parmy obecn\u00E9 j\u00EDt o norm\u00E1ln\u00ED" . "V\u00FDskyt a biologick\u00FD v\u00FDznam hermafroditizmu u parmy obecn\u00E9, Barbus barbus" . .