Anglers' catches as an indicator of fish population status.

Result code in 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>
Result on the web
—
DOI - Digital Object Identifier
—

Result language
angličtina
Original language name
Anglers' catches as an indicator of fish population status.
Original language description
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.
Czech name
—
Czech description
—

Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
GL - Fishery
OECD FORD branch
—

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year
2003
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)