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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10618 - Ecology

Project

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Continuities

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

Publication year

2017

Confidentiality

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

Name of the periodical

Aquatic Living Resources

ISSN

0990-7440

e-ISSN

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Volume of the periodical

30

Issue of the periodical within the volume

MAR 29 2017

Country of publishing house

FR - FRANCE

Number of pages

7

Pages from-to

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UT code for WoS article

000406771100001

EID of the result in the Scopus database

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