Elimination of Bryozoans in Intensive Fish Farming

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43210%2F16%3A43910142" target="_blank" >RIV/62156489:43210/16:43910142 - isvavai.cz</a>

Výsledek na webu

<a href="https://mnet.mendelu.cz/mendelnet2016/mnet_2016_full.pdf" target="_blank" >https://mnet.mendelu.cz/mendelnet2016/mnet_2016_full.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Elimination of Bryozoans in Intensive Fish Farming

Popis výsledku v původním jazyce

The aim of this study was to establish a methodology for efficient elimination of bryozoans in fish farms and their water sources. Another point was to evaluate the economic effectiveness of the suggested measures. The presence of bryozoans in aquaculture may be unfavourable because they are hosts of myxozoa that cause proliferative kidney disease (PKD), accompanied by high mortality of fish and thus high economic damages. The second problem is that bryozoans' colonies may cover surfaces as pipes and biofilters. To test the elimination of bryozoans, agents commonly used in aquaculture, such as Savo, Persteril, and formaldehyde were used. Two species of bryozoans were selected as model species (Plumatella emarginata and Cristatella mucedo) and were tested using different concentrations of metioned substances. Colonies of species C. mucedo were more resistant against the chemicals than colonies of species P. emarginata. All individuals of species P. emarginata were killed in concentrations 0.025% for Savo, 0.0031% for Persteril, and 0.0063% for formaldehyde. All individuals of bryozoan C. mucedo were killed in concentrations 0.1% for Savo, 0.0063% for Persteril, and 0.0125% for formaldehyde. The concentrations of formaldehyde, as the only product used, killed bryozoan colonies at lower concentrations than quoted lethal concentrations for fish and selected aquatic invertebrates. Therefore, in devices with fish, the recommend concentration is 0.0125% (1.38 mg/l). Formaldehyde is the most expensive of all the tested agents at CZK 37.4/m3, while Savo is the cheapest at CZK 30/m3.

Název v anglickém jazyce

Elimination of Bryozoans in Intensive Fish Farming

Popis výsledku anglicky

The aim of this study was to establish a methodology for efficient elimination of bryozoans in fish farms and their water sources. Another point was to evaluate the economic effectiveness of the suggested measures. The presence of bryozoans in aquaculture may be unfavourable because they are hosts of myxozoa that cause proliferative kidney disease (PKD), accompanied by high mortality of fish and thus high economic damages. The second problem is that bryozoans' colonies may cover surfaces as pipes and biofilters. To test the elimination of bryozoans, agents commonly used in aquaculture, such as Savo, Persteril, and formaldehyde were used. Two species of bryozoans were selected as model species (Plumatella emarginata and Cristatella mucedo) and were tested using different concentrations of metioned substances. Colonies of species C. mucedo were more resistant against the chemicals than colonies of species P. emarginata. All individuals of species P. emarginata were killed in concentrations 0.025% for Savo, 0.0031% for Persteril, and 0.0063% for formaldehyde. All individuals of bryozoan C. mucedo were killed in concentrations 0.1% for Savo, 0.0063% for Persteril, and 0.0125% for formaldehyde. The concentrations of formaldehyde, as the only product used, killed bryozoan colonies at lower concentrations than quoted lethal concentrations for fish and selected aquatic invertebrates. Therefore, in devices with fish, the recommend concentration is 0.0125% (1.38 mg/l). Formaldehyde is the most expensive of all the tested agents at CZK 37.4/m3, while Savo is the cheapest at CZK 30/m3.

Druh

D - Stať ve sborníku

CEP obor

GL - Rybářství

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název statě ve sborníku

MendelNet 2016: Proceedings of International PhD Students Conference

ISBN

978-80-7509-443-8

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

331-336

Název nakladatele

Mendelova univerzita v Brně

Místo vydání

Brno

Místo konání akce

Brno

Datum konání akce

9. 11. 2016

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

000392968500060