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

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/60076658:12310/22:43904516

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

40103 - Fishery

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Journal of Cleaner Production

ISSN

0959-6526

e-ISSN

1879-1786

Svazek periodika

364

Číslo periodika v rámci svazku

neuvedeno

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

14

Strana od-do

nestrankovano

Kód UT WoS článku

000821948800010

EID výsledku v databázi Scopus

2-s2.0-85132233469