. . . "Indirect manifestation of cormorant (Phalacrocorax carbo (L.)) predation on pond fish stock"@en . "1961-9502" . "[91A0F241988D]" . "FR - Francouzsk\u00E1 republika" . . "Indirect manifestation of cormorant (Phalacrocorax carbo (L.)) predation on pond fish stock"@en . "RIV/60076658:12610/08:00008918" . "4"^^ . . . "4"^^ . "Ad\u00E1mek, Zden\u011Bk" . "Knowledge and Management of Aquatic Ecosystems" . "Nep\u0159\u00EDm\u00E9 d\u016Fsledky predace kormor\u00E1na velk\u00E9ho (Phalacrocorax carbo (L.)) na obs\u00E1dky rybn\u00EDk\u016F"@cs . "Piscivorous predators; fish wounding; fish condition; image analysis; carp pond culture."@en . . . . "11"^^ . "Indirect manifestation of cormorant (Phalacrocorax carbo (L.)) predation on pond fish stock" . "000264465800001" . . . "Flaj\u0161hans, Martin" . "Kortan, Ji\u0159\u00ED" . . "1" . . "389" . "Indirect manifestation of cormorant (Phalacrocorax carbo (L.)) predation on pond fish stock" . . . "RIV/60076658:12610/08:00008918!RIV09-MSM-12610___" . . "12610" . "Pia\u010Dkov\u00E1, Veronika" . . "Z(MSM6007665809)" . "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. Healed wounds reduce the commercial value of afflicted fish and stress may impact fish body and health condition. Fulton\u00B4s condition coefficient (FCC) was calculated for wounded and healthy two?year old carp originating from five South Moravian (Czech Republic) fishponds. Significant (P = 0,0011) differences in FCC were found between non-wounded (1,48 ? 0,11, n = 19) and wounded mirror common carp, Cyprinus carpio (1,33 ? 0,14, n = 19). However no differences (P >0,05) were recorded in scaly common carp between non-wounded (FCC 1,41 ? 0,25, n = 33) and wounded (FCC 1,46 ? 0,47, n = 33) fish of the same age and size category. A computer assisted image analysis was applied to describe the extent of such injuries. In the case of two-year old mirror, scaly and bighead carp (Aristichthys no" . "Nep\u0159\u00EDm\u00E9 d\u016Fsledky predace kormor\u00E1na velk\u00E9ho (Phalacrocorax carbo (L.)) na obs\u00E1dky rybn\u00EDk\u016F"@cs . . "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. Healed wounds reduce the commercial value of afflicted fish and stress may impact fish body and health condition. Fulton\u00B4s condition coefficient (FCC) was calculated for wounded and healthy two?year old carp originating from five South Moravian (Czech Republic) fishponds. Significant (P = 0,0011) differences in FCC were found between non-wounded (1,48 ? 0,11, n = 19) and wounded mirror common carp, Cyprinus carpio (1,33 ? 0,14, n = 19). However no differences (P >0,05) were recorded in scaly common carp between non-wounded (FCC 1,41 ? 0,25, n = 33) and wounded (FCC 1,46 ? 0,47, n = 33) fish of the same age and size category. A computer assisted image analysis was applied to describe the extent of such injuries. In the case of two-year old mirror, scaly and bighead carp (Aristichthys no"@en . . "371900" . "\u0160kody zp\u016Fsoben\u00E9 preda\u010Dn\u00EDm tlakem kormor\u00E1na velk\u00E9ho na ryb\u00EDch obs\u00E1dk\u00E1ch jsou v\u00FDsledkem nejen p\u0159\u00EDm\u00E9 predace, tj. konzumu ryb, ale tak\u00E9 dal\u0161\u00EDch vliv\u016F jako je zra\u0148ov\u00E1n\u00ED a stresov\u00E1n\u00ED ryb. Pokud nedojde k \u00FAhynu a takto zp\u016Fsoben\u00E1 zran\u011Bn\u00ED se zahoj\u00ED, ryby p\u0159esto ztr\u00E1cej\u00ED tr\u017En\u00ED hodnotu. Stres u ryb m\u016F\u017Ee v\u00E9st ke zhor\u0161en\u00ED t\u011Blesn\u00E9 a zdravotn\u00ED kondice. Fulton\u016Fv koeficient kondice (FCC) byl vypo\u010Dten a porovn\u00E1v\u00E1n pro zran\u011Bn\u00E9 a zdrav\u00E9 ryby z 5 jihomoravsk\u00FDch rybn\u00EDk\u016F. Vysoce pr\u016Fkazn\u00FD rozd\u00EDl (P = 0,0011) v FCC byl shled\u00E1n mezi nezran\u011Bn\u00FDmi (1,48 ? 0,11, n = 19) a zran\u011Bn\u00FDmi (1,33 ? 0,14, n = 19) rybami u dvoulet\u00E9ho kapra lysce Cyprinus carpio, narozd\u00EDl od \u0161upinat\u00E9ho kapra stejn\u00E9 hmotnostn\u00ED a velikostn\u00ED kategorie, u kter\u00E9ho rozd\u00EDl mezi zdrav\u00FDmi jedinci (FCC 1.41 ? 0,25, n = 33) a zran\u011Bn\u00FDmi (FCC 1.46 ? 0.47, n = 33) nebyl prokazateln\u00FD (P >0.05). K vyhodnocen\u00ED rozsahu poran\u011Bn\u00ED t\u011Bla jedinc\u016F byla pou\u017Eita po\u010D\u00EDta\u010Dov\u00E1 anal\u00FDza obrazu. V p\u0159\u00EDpad\u011B \u0161upinat\u00E9ho a lys\u00E9ho kapra byla ran\u011Bn\u00ED identifikov\u00E1na na 1,93 a 0,89 % povrchu t\u011Bla"@cs . .