The concept of balanced fish nutrition in temperate European fishponds to tackle eutrophication

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12520%2F22%3A43904516" target="_blank" >RIV/60076658:12520/22:43904516 - isvavai.cz</a>

Alternative codes found

RIV/60076658:12310/22:43904516

Result on the web

<a href="https://doi.org/10.1016/j.jclepro.2022.132584" target="_blank" >https://doi.org/10.1016/j.jclepro.2022.132584</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jclepro.2022.132584" target="_blank" >10.1016/j.jclepro.2022.132584</a>

Result language

angličtina

Original language name

The concept of balanced fish nutrition in temperate European fishponds to tackle eutrophication

Original language description

The present work aimed to understand nutrient enrichment and resultant eutrophication caused by carp farming in semi-intensively managed, temperate shallow-lake ecosystems like central European fishponds - combining animal nutrition and plankton ecology group model principles. In the traditional yet predominant pond farming in central Europe, carp stocks start the vegetative season on a ketogenic diet (high in natural food), have a balanced diet shortly in mid-season (cereals introduced as supplementary feed), and end on a starchy diet (high in cereals). Under beginning-season diets, the fish (carp) stock exhibit high but non-bioeconomic N and P retentions. With a surplus of &apos;digestible&apos; N (protein, amino acids) relative to insufficient carbohydrate energy, much of the digested N is pumped back to the environment in algae-reactive forms (NH4-N). A surplus of digestible P per unit of digestible N also triggers renal clearance of digested P; pumped back to environment as PO43- . By the end-of-season, N, P retentions deteriorate significantly due to high metabolic N losses caused by missing digestible amino acids (lysine, isoleucine) and decreased P digestibility, respectively. Little digested P is unutilized and even discarded in tandem with poor N deposition. End-of-season feeding in fishponds is perhaps most polluting and triggers de-novo lipogenesis, instead of protein (biomass) accretion. However, the ratio of reactive losses (to suspended losses) of N, P, which could instantly trigger algal assimilation, is equally high (bad) at the beginning-and end-of-season. We show aggravated N, P loading by carp may occur both under high and low zooplankton-zoobenthos availability, contradictory to prevailing notions. Environmental nutrient loading by carps is most suppressed, including lowest reactive N, P losses, when diet is balanced. Carp farming in regional fishponds could benefit by adopting scientifically sound &apos;pond feeds&apos; and managing carps&apos; satiety to graze (or spare) zooplankton-zoobenthos for prolonging clear-water phase.

Czech name

—

Czech description

—

Type

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

CEP classification

—

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

2022

Confidentiality

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

Name of the periodical

Journal of Cleaner Production

ISSN

0959-6526

e-ISSN

1879-1786

Volume of the periodical

364

Issue of the periodical within the volume

neuvedeno

Country of publishing house

GB - UNITED KINGDOM

Number of pages

14

Pages from-to

nestrankovano

UT code for WoS article

000821948800010

EID of the result in the Scopus database

2-s2.0-85132233469