Differences in the plankton communities of newly-created small fishponds under different fishery management regimes

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43210%2F23%3A43923435" target="_blank" >RIV/62156489:43210/23:43923435 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1127/fal/2023/1497" target="_blank" >https://doi.org/10.1127/fal/2023/1497</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1127/fal/2023/1497" target="_blank" >10.1127/fal/2023/1497</a>

Result language

angličtina

Original language name

Differences in the plankton communities of newly-created small fishponds under different fishery management regimes

Original language description

Fishponds are man-made shallow waterbodies with ecosystems that mainly rely on fishery management. It is generally assumed that a fishpond&apos;s plankton assemblage structure results from a combination of bottom-up and top-down effects; however, knowledge about the development of plankton in newly-created fishponds with differing fish stock biomass is scarce. To address this, we investigated plankton community development over two years in five newly-created fishponds in the Czech Republic, Central Europe. The main cultured fish species in the fishponds were tench (Tinca tinca) and pikeperch (Sander lucioperca). In addition, the invasive and zooplanktivorous topmouth gudgeon (Pseudorasbora parva) was regularly present and probably reduced zooplankton abundance. The results indicated that the plankton communities were mainly composed of smaller-sized zooplankton taxa, especially rotifers (Asplanchna Brachionus Keratella Filinia) and cladocerans (mainly Bosmina longirostris). The phytoplankton was dominated by green algae, with the exception of one fishpond with high phosphorus and nitrogen concentrations, which was dominated by the cyanobacterium Planktothrix aghardii. The main factors determining both phytoplankton and zooplankton development were total phosphorus, total nitrogen, water transparency and chlorophyll-a concentration, which together explained a significant part of the variability (phytoplankton 47 %, zooplankton 70 %). The effect of fishery management was not significant, though the presence of topmouth gudgeon was found to be an important factor, being negatively correlated with the stocking of farmed fish. Overall, the availability, concentration and relative ratio of key nutrients was of critical importance in the development of fishpond plankton communities.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

40103 - Fishery

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)

Publication year

2023

Confidentiality

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

Name of the periodical

Fundamental and Applied Limnology

ISSN

1863-9135

e-ISSN

2363-7110

Volume of the periodical

197

Issue of the periodical within the volume

1

Country of publishing house

DE - GERMANY

Number of pages

12

Pages from-to

25-36

UT code for WoS article

000982897300001

EID of the result in the Scopus database

2-s2.0-85178349178