Do otters target the same fish species and sizes as anglers? A case study from a lowland trout stream (Czech Republic)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F17%3A10370201" target="_blank" >RIV/00216208:11310/17:10370201 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1051/alr/2017011" target="_blank" >http://dx.doi.org/10.1051/alr/2017011</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/alr/2017011" target="_blank" >10.1051/alr/2017011</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Do otters target the same fish species and sizes as anglers? A case study from a lowland trout stream (Czech Republic)

Popis výsledku v původním jazyce

Stocking of hatchery-reared fish into streams is a common practice in fisheries industry as it provides catches for recreational anglers and support for native fish populations. The Eurasian otter Lutra lutra is one of the most important freshwater piscivorous predators in Europe. Impact of otters on stocked fish is a source of conflict between fisheries industry and environmental protection. This study aimed to describe differences between otter diet and catches of anglers on a lowland trout stream with salmonid stocking. Otter diet was studied during winter, using spraint analysis. Fish dominated otter diet (85% of biomass). Gudgeon Gobio gobio was the most important otter prey (38% of biomass). Catches of otters and catches of anglers on the stream were significantly different. Otters mostly preyed upon small-growing fish species of medium or no angling value while anglers took large-growing fish species of medium and high angling value. Otters took fish with average weight of 10 g while anglers took fish with average weight of 290 g. Stocked salmonids made up 13% of estimated biomass in otter diet. Otters targeted significantly different fish species of different sizes than anglers did.

Název v anglickém jazyce

Do otters target the same fish species and sizes as anglers? A case study from a lowland trout stream (Czech Republic)

Popis výsledku anglicky

Stocking of hatchery-reared fish into streams is a common practice in fisheries industry as it provides catches for recreational anglers and support for native fish populations. The Eurasian otter Lutra lutra is one of the most important freshwater piscivorous predators in Europe. Impact of otters on stocked fish is a source of conflict between fisheries industry and environmental protection. This study aimed to describe differences between otter diet and catches of anglers on a lowland trout stream with salmonid stocking. Otter diet was studied during winter, using spraint analysis. Fish dominated otter diet (85% of biomass). Gudgeon Gobio gobio was the most important otter prey (38% of biomass). Catches of otters and catches of anglers on the stream were significantly different. Otters mostly preyed upon small-growing fish species of medium or no angling value while anglers took large-growing fish species of medium and high angling value. Otters took fish with average weight of 10 g while anglers took fish with average weight of 290 g. Stocked salmonids made up 13% of estimated biomass in otter diet. Otters targeted significantly different fish species of different sizes than anglers did.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10618 - Ecology

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Aquatic Living Resources

ISSN

0990-7440

e-ISSN

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Svazek periodika

30

Číslo periodika v rámci svazku

MAR 29 2017

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

7

Strana od-do

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Kód UT WoS článku

000406771100001

EID výsledku v databázi Scopus

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