"RIV/60076658:12610/07:00007826" . . "Ad\u00E1mek, Zden\u011Bk" . "1" . "43" . "12610" . "Cormorant; Phalacrocorax carbo; fish wounding; fish predators"@en . "Bulletin V\u00DARH Vod\u0148any" . . . . "Secondary losses on fish production caused by feeding activity of great cormorant (Phalacrocorax carbo sinensis)"@en . . . "47-54" . . . "Zv\u00FD\u0161en\u00FD v\u00FDskyt kormor\u00E1na velk\u00E9ho Phalacrocorax carbo sinensis L., spojen\u00FD s hn\u00EDzd\u011Bn\u00EDm, je na \u00FAzem\u00ED \u010Cesk\u00E9 republiky zaznamen\u00E1v\u00E1n od 80. t\u00FDch let. Tento jev je spojen s postupnou expanz\u00ED populace kormor\u00E1na do cel\u00E9 Evropy. Predace migruj\u00EDc\u00EDch seversk\u00FDch populac\u00ED kormor\u00E1n\u016F na rybnik\u00E1\u0159sk\u00FDch objektech se stala v\u00E1\u017En\u00FDm probl\u00E9mem, a to p\u0159edev\u0161\u00EDm v dob\u011B jarn\u00EDch a podzimn\u00EDch tah\u016F. Krom\u011B konzumu ryb pat\u0159\u00ED ke \u0161kod\u00E1m zp\u016Fsoben\u00FDm preda\u010Dn\u00EDm tlakem kormor\u00E1na tak\u00E9 zra\u0148ov\u00E1n\u00ED a stresov\u00E1n\u00ED ryb. Ryby, kter\u00E9 se kormor\u00E1novi nepoda\u0159\u00ED ulovit, proto\u017Ee mu unikly ze zob\u00E1ku, nebo kter\u00E9 nedok\u00E1zal polknout kv\u016Fli velikosti, maj\u00ED r\u016Fzn\u011B hlubok\u00E1 poran\u011Bn\u00ED, kter\u00E1 jsou n\u00E1sledn\u011B \u010Dastou p\u0159\u00ED\u010Dinou infekce a \u00FAhynu. Zran\u011Bn\u00ED, kter\u00E1 se zahoj\u00ED pak sni\u017Euj\u00ED tr\u017En\u00ED hodnotu ryb. Rozsah t\u011Bchto zran\u011Bn\u00ED na jedinc\u00EDch byl vyhodnocen pomoc\u00ED anal\u00FDzy obrazu. Av\u0161ak mnohem d\u016Fle\u017Eit\u011Bj\u0161\u00ED je celkov\u00E9 vyhodnocen\u00ED po\u010Dtu poran\u011Bn\u00FDch a uhynul\u00FDch ryb v rybochovn\u00FDch objektech. Ekonomick\u00E9 ztr\u00E1ty zp\u016Fsoben\u00E9 zra\u0148ov\u00E1n\u00EDm ryb moho dos\u00E1hnout 25 - 100 % ztr\u00E1t zp\u016Fsoben\u00FDch p\u0159\u00EDm\u00FDm ko"@cs . "Sekund\u00E1rn\u00ED \u0161kody na ryb\u00E1ch zp\u016Fsoben\u00E9 potravn\u00ED aktivitou kormor\u00E1na velk\u00E9ho (Phalacrocorax carbo sinensis)" . "P(GA206/03/0532), P(GP206/03/D064), S, Z(MSM6007665809)" . . . "RIV/60076658:12610/07:00007826!RIV08-MSM-12610___" . "An increasing occurrence of cormorants Phalacrocorax carbo sinensis L. associated with increased nesting in the Czech Republic has been recorded since the end of 80\u00B4s. This is considered as consequence of permanent expansion of this species over the whole of Europe. Predation of migrating northern cormorant populations on commercial fishponds is considered to be a serious problem especially during the periods of spring and autumnal migration. The damage to fisheries caused by cormorant predation pressure consists of losses due to direct predation and subsequent indirect losses elicited by cormorant feeding activities resulting in fish wounding and stress. Stricken fish, which have escaped from cormorant attack or which cannot be swallowed due to their size, suffer from various deep and/or surface injuries, which are a frequent precursor to subsequent infection and mortality. Healed wounds reduce the commercial value of afflicted fish. Extend of these injures has been evaluated by the image analysis, b"@en . "CZ - \u010Cesk\u00E1 republika" . "[0A747A25BE9A]" . . "Kortan, Ji\u0159\u00ED" . "Sekund\u00E1rn\u00ED \u0161kody na ryb\u00E1ch zp\u016Fsoben\u00E9 potravn\u00ED aktivitou kormor\u00E1na velk\u00E9ho (Phalacrocorax carbo sinensis)" . . "Secondary losses on fish production caused by feeding activity of great cormorant (Phalacrocorax carbo sinensis)"@en . "Sekund\u00E1rn\u00ED \u0161kody na ryb\u00E1ch zp\u016Fsoben\u00E9 potravn\u00ED aktivitou kormor\u00E1na velk\u00E9ho (Phalacrocorax carbo sinensis)"@cs . . . . . "Sekund\u00E1rn\u00ED \u0161kody na ryb\u00E1ch zp\u016Fsoben\u00E9 potravn\u00ED aktivitou kormor\u00E1na velk\u00E9ho (Phalacrocorax carbo sinensis)"@cs . "2"^^ . "8"^^ . . . . "0007-389X" . "2"^^ . "449224" . "Zv\u00FD\u0161en\u00FD v\u00FDskyt kormor\u00E1na velk\u00E9ho Phalacrocorax carbo sinensis L., spojen\u00FD s hn\u00EDzd\u011Bn\u00EDm, je na \u00FAzem\u00ED \u010Cesk\u00E9 republiky zaznamen\u00E1v\u00E1n od 80. t\u00FDch let. Tento jev je spojen s postupnou expanz\u00ED populace kormor\u00E1na do cel\u00E9 Evropy. Predace migruj\u00EDc\u00EDch seversk\u00FDch populac\u00ED kormor\u00E1n\u016F na rybnik\u00E1\u0159sk\u00FDch objektech se stala v\u00E1\u017En\u00FDm probl\u00E9mem, a to p\u0159edev\u0161\u00EDm v dob\u011B jarn\u00EDch a podzimn\u00EDch tah\u016F. Krom\u011B konzumu ryb pat\u0159\u00ED ke \u0161kod\u00E1m zp\u016Fsoben\u00FDm preda\u010Dn\u00EDm tlakem kormor\u00E1na tak\u00E9 zra\u0148ov\u00E1n\u00ED a stresov\u00E1n\u00ED ryb. Ryby, kter\u00E9 se kormor\u00E1novi nepoda\u0159\u00ED ulovit, proto\u017Ee mu unikly ze zob\u00E1ku, nebo kter\u00E9 nedok\u00E1zal polknout kv\u016Fli velikosti, maj\u00ED r\u016Fzn\u011B hlubok\u00E1 poran\u011Bn\u00ED, kter\u00E1 jsou n\u00E1sledn\u011B \u010Dastou p\u0159\u00ED\u010Dinou infekce a \u00FAhynu. Zran\u011Bn\u00ED, kter\u00E1 se zahoj\u00ED pak sni\u017Euj\u00ED tr\u017En\u00ED hodnotu ryb. Rozsah t\u011Bchto zran\u011Bn\u00ED na jedinc\u00EDch byl vyhodnocen pomoc\u00ED anal\u00FDzy obrazu. Av\u0161ak mnohem d\u016Fle\u017Eit\u011Bj\u0161\u00ED je celkov\u00E9 vyhodnocen\u00ED po\u010Dtu poran\u011Bn\u00FDch a uhynul\u00FDch ryb v rybochovn\u00FDch objektech. Ekonomick\u00E9 ztr\u00E1ty zp\u016Fsoben\u00E9 zra\u0148ov\u00E1n\u00EDm ryb moho dos\u00E1hnout 25 - 100 % ztr\u00E1t zp\u016Fsoben\u00FDch p\u0159\u00EDm\u00FDm ko" . . .