Zimní predace vydry říční (Lutra lutra) na kaprových rybnících

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Otter (Lutra lutra) winter predation on carp ponds

Popis výsledku v původním jazyce

Otter (Lutra lutra) diet was studied by analysing of 180 spraints and 29 partly consumed fish remains found in winter around fishponds in South Bohemia. The proportion of fish found in spraints was 95.6% of all prey items, roach (Rutilus rutilus), topmouth gudgeon (Pseudorasbora parva) and common carp (Cyprinus carpio) being the most numerically abundant species. Carp dominated the diet by mass (47.8%), whilst roach and ?other commercial fish species? formed 21.8 and 15.3% of total biomass, respectively. Small fish (< 200 mm) predominated in the diet and only 4.0% of all fish found in spraints exceeded 300 mm TL. Large fish remains were very scarce in spraints and were best recorded from uneaten prey remains. The original length of carp corpses rangedbetween 283 and 530 mm TL, and the proportion of body mass consumed varied between 5.0 ? 90.1%. The length of pike remains ranged from 386 to 754 mm TL, of which 84.0% of body mass on average was consumed by otters.

Název v anglickém jazyce

Otter (Lutra lutra) winter predation on carp ponds

Popis výsledku anglicky

Otter (Lutra lutra) diet was studied by analysing of 180 spraints and 29 partly consumed fish remains found in winter around fishponds in South Bohemia. The proportion of fish found in spraints was 95.6% of all prey items, roach (Rutilus rutilus), topmouth gudgeon (Pseudorasbora parva) and common carp (Cyprinus carpio) being the most numerically abundant species. Carp dominated the diet by mass (47.8%), whilst roach and ?other commercial fish species? formed 21.8 and 15.3% of total biomass, respectively. Small fish (< 200 mm) predominated in the diet and only 4.0% of all fish found in spraints exceeded 300 mm TL. Large fish remains were very scarce in spraints and were best recorded from uneaten prey remains. The original length of carp corpses rangedbetween 283 and 530 mm TL, and the proportion of body mass consumed varied between 5.0 ? 90.1%. The length of pike remains ranged from 386 to 754 mm TL, of which 84.0% of body mass on average was consumed by otters.

Druh

D - Stať ve sborníku

CEP obor

GL - Rybářství

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2008

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Resource Management. Natural, human and material resources for the sustainable development of aquaculture

ISBN

978-83-60111-30-7

ISSN

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e-ISSN

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Počet stran výsledku

2

Strana od-do

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Název nakladatele

European Aquaculture Society

Místo vydání

Olsztyn, Polsko

Místo konání akce

Krakow, Polsko

Datum konání akce

15. 9. 2008

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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