The influence of fisheries management on the brown trout population in Moravice River

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43210%2F16%3A43909756" target="_blank" >RIV/62156489:43210/16:43909756 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.11118/actaun201664041115" target="_blank" >http://dx.doi.org/10.11118/actaun201664041115</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.11118/actaun201664041115" target="_blank" >10.11118/actaun201664041115</a>

Result language

angličtina

Original language name

The influence of fisheries management on the brown trout population in Moravice River

Original language description

In 2013, an ichthyological investigation with focus on the population of brown trout (Salmo trutta m. fario) in Moravice River above Slezská Harta dam reservoir in 6 localities of two salmonid fsheries was conducted (3 locations in fshery Moravice 7 and 3 locations in fshery Moravice 8). Ichthyological investigation in 2013 found abundance of brown trout in fshery Moravice 7 1,621 pcs/ha, in fshery Moravice 8 668 pcs/ha. These results were compared with the results of ichthyological investigations from 2004 (Spurný et al. 2006) and 2012 (unpublished data) that were conducted in the same locations of salmonid fsheries of Moravice 7 and Moravice 8. Over 10 years the size structure of brown trout population has changed, which was shown as higher proportion of juvenile fsh in size (TL) to 15 cm. The average abundance of brown trout with TL up to 15 cm reached in fshery Moravice 7 in 2004 15 pcs/ha (Spurný et al. 2006), in 2013 1,039 pcs/ha, in fshery Moravice 8 in 2004 719 pcs/ha and in 2012 2,234 pcs/ha. Change in size structure of population of brown trout in monitored localities between 2004, 2012 and 2013 was evaluated as statistically signifcant (d. f. 10; F = 12.8; P < 0.05). Ichthyologic investigations in 2004 (Spurný et al. 2006), 2012 (unpublished data) and 2013 determined also abundance of brown trout in fshing size (TL over 25 cm): 54 pcs/ha in 2004 (Spurný et al. 2006), in 2012 (unpublished data) 41 pcs/ha, and in 2013 56 pcs/ha. These values were compared with catches of anglers, and according to the results we can say that the fshing pressure had no effect on the abundance of brown trout in fshing size. Abundance of brown trout in salmonid fsheries Moravice 7 and Moravice 8 is probably affected by drought and occurrence of piscivorous predators.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

GL - Fishery

OECD FORD branch

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Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2016

Confidentiality

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

Name of the periodical

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis

ISSN

1211-8516

e-ISSN

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Volume of the periodical

64

Issue of the periodical within the volume

4

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

9

Pages from-to

1115-1123

UT code for WoS article

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EID of the result in the Scopus database

2-s2.0-84990938521