Carbon metabolism and nutrient balance in a hypereutrophic semi-intensive fishpond

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12220%2F19%3A43899516" target="_blank" >RIV/60076658:12220/19:43899516 - isvavai.cz</a>

Alternative codes found

RIV/60077344:_____/19:00517387 RIV/67985939:_____/19:00517387 RIV/60076658:12520/19:43899516

Result on the web

<a href="https://doi.org/10.1051/kmae/2019043" target="_blank" >https://doi.org/10.1051/kmae/2019043</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/kmae/2019043" target="_blank" >10.1051/kmae/2019043</a>

Result language

angličtina

Original language name

Carbon metabolism and nutrient balance in a hypereutrophic semi-intensive fishpond

Original language description

Eutrophication and nutrient pollution is a serious problem in many fish aquaculture ponds, whose causes are often not well documented. The efficiency of using inputs for fish production in a hypereutrophic fishpond (Dehtar), was evaluated using organic carbon (OC), nitrogen (N) and phosphorus (P) balances and measurement of ecosystem metabolism rates in 2015. Primary production and feeds were the main inputs of OC and contributed 82% and 13% to the total OC input, respectively. Feeds and manure were the major inputs of nutrients and contributed 73% and 86% of the total inputs of N and P, respectively. Ecosystem respiration, accumulation in water and accumulation in sediment were the main fates of OC, N and P, respectively. They accounted for 79%, 52% and 61% of OC, N and P inputs. The efficiency of using OC, N and P inputs to produce fish biomass was very low and represented 0.9%, 25% and 23% of total OC, N, and P inputs, indicating an excessive phytoplankton production and overdosing of fish feeds and manure. Dehtar pond was slightly autotrophic and phosphorus availability did not limit the phytoplankton growth. The low efficiency of using inputs was attributed to the low digestibility of raw cereals grain used as feed and the inability of planktonic food webs to transfer the primary production to fish due to high predatory pressure of fish stock on zooplankton. The primary production is an important input of OC in semi-intensive fishponds and should be considered in evaluations of fish production efficiency.

Czech name

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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

10617 - Marine biology, freshwater biology, limnology

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

2019

Confidentiality

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

Name of the periodical

Knowledge and Management of Aquatic Ecosystems

ISSN

1961-9502

e-ISSN

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Volume of the periodical

2019

Issue of the periodical within the volume

420

Country of publishing house

FR - FRANCE

Number of pages

12

Pages from-to

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UT code for WoS article

000499711300001

EID of the result in the Scopus database

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