Elimination of Bryozoans in Intensive Fish Farming

Result code in 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>

Result on the web

<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

—

Result language

angličtina

Original language name

Elimination of Bryozoans in Intensive Fish Farming

Original language description

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.

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

GL - Fishery

OECD FORD branch

—

Project

—

Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2016

Confidentiality

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

Article name in the collection

MendelNet 2016: Proceedings of International PhD Students Conference

ISBN

978-80-7509-443-8

ISSN

—

e-ISSN

—

Number of pages

6

Pages from-to

331-336

Publisher name

Mendelova univerzita v Brně

Place of publication

Brno

Event location

Brno

Event date

Nov 9, 2016

Type of event by nationality

EUR - Evropská akce

UT code for WoS article

000392968500060