Anglers' catches as an indicator of fish population status.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081766%3A_____%2F03%3A67030046" target="_blank" >RIV/68081766:_____/03:67030046 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Anglers' catches as an indicator of fish population status.

Popis výsledku v původním jazyce

Long-term catch-records from sport anglers can be used as a significant indicator of changes in the distribution and population size of some fish species, as well as the effects of stocking. Evaluating 50-year series of records in the Czech Republic we conclude that there is a marked decrease in the numbers of Barbus barbus, Chondrostoma nasus, Vimba vimba and Leuciscus cephalus, i.e. species chracteristic of the Barbus type fish community. This is the results of a gradual but marked restriction of thiscommunity type in individual streams caused by dam construction and canalisation. Catches of Thymallus thymallus have shown a marked increase in size, resulting from the increased extent of suitable waters caused by damming and from intense stocking with yearlings of the species. Catches of Salmo truta m. fario and Thymallus thymallus indicate heavy predation pressure exerted by cormorants (Phalacrocorax carbo) upon these species in a section of one river, the river Dyje below a dam.

Název v anglickém jazyce

Anglers' catches as an indicator of fish population status.

Popis výsledku anglicky

Long-term catch-records from sport anglers can be used as a significant indicator of changes in the distribution and population size of some fish species, as well as the effects of stocking. Evaluating 50-year series of records in the Czech Republic we conclude that there is a marked decrease in the numbers of Barbus barbus, Chondrostoma nasus, Vimba vimba and Leuciscus cephalus, i.e. species chracteristic of the Barbus type fish community. This is the results of a gradual but marked restriction of thiscommunity type in individual streams caused by dam construction and canalisation. Catches of Thymallus thymallus have shown a marked increase in size, resulting from the increased extent of suitable waters caused by damming and from intense stocking with yearlings of the species. Catches of Salmo truta m. fario and Thymallus thymallus indicate heavy predation pressure exerted by cormorants (Phalacrocorax carbo) upon these species in a section of one river, the river Dyje below a dam.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

GL - Rybářství

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2003

Kód důvěrnosti údajů

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

Název periodika

Ecohydrology and hydrobiology

ISSN

1642-3593

e-ISSN

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Svazek periodika

3

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

PL - Polská republika

Počet stran výsledku

7

Strana od-do

113-119

Kód UT WoS článku

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EID výsledku v databázi Scopus

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