Feeding value of low opportunity cost biomasses (agri-food by-products) for development of circular pond fish feeds: An evaluation with common carp (Cyprinus carpio)

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12520%2F25%3A43909677" target="_blank" >RIV/60076658:12520/25:43909677 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1016/j.aqrep.2025.102753" target="_blank" >https://doi.org/10.1016/j.aqrep.2025.102753</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.aqrep.2025.102753" target="_blank" >10.1016/j.aqrep.2025.102753</a>

Result language

angličtina

Original language name

Feeding value of low opportunity cost biomasses (agri-food by-products) for development of circular pond fish feeds: An evaluation with common carp (Cyprinus carpio)

Original language description

In many cases, prior to their inclusion in feed, food system by-products need some sort of refinement. Many options are being explored on how these by-products could aid in direct re-generation of food with the shortest value chain. In this study, we hypothesized that common carp raised semi-intensively in European fishponds could convert waste resources to food directly. The 30 % ingredient replacement method was used to evaluate the digestibility of 12 local waste resources of plant origin as candidates for &apos;circular feed ingredients&apos; for feeding pond fish. It was evident from the results that protein digestion (&gt;70 %) is not an issue, even showing similarities between pre-treated resources (brewery wastes) and non-pre-treated resources (oilseed expellers or legumes) - but lysine or methionine decide from 20 % - 49 % utilization of digested protein from those ingredients. It is therefore, recommended that complementary combination of ingredients be explored to overcome limiting DIAAS in natural food base in ponds. In this case, rapeseed expeller and barley distillers&apos; grain seem to be closest candidates to fix the lysine and methionine limitation in natural pond food base. Microbial/enzymatic/mechanical pre-processed ingredients such as extract of sugar beet, brewery wastes, bakery or extruded breakfast cereals have low pollution potential (P bioavailability 50-80 %) - contrary to proteinaceous resources (oilseed expellers or broken legumes) which had P bioavailability &lt;= 25 % (except pea). Bakery or breakfast cereals discards are novel sources of digestible energy for pond fish (similar to 400 kcal 100 g(-1)). Given that NDF:ADF ratio (&gt;2:1) allow for easy fermentation in gut, besides possibly laced with microbial enzymes or some pre-hydrolysis, the undigested fibers in sugar beet, legumes, or oilseed expeller (AD carbohydrate 1-20 %) could boost pond food web through microbial upcycling. This study highlights the possibility of developing circular, less-refined semiintensive pond fish feeds &quot;commercially&quot;. Such feed could enhance resource use efficiency at food-system level.

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

—

OECD FORD branch

40103 - Fishery

Project

<a href="/en/project/QK22010177" target="_blank" >QK22010177: Optimalisation of supplemental feeding and management of pond aquaculture</a><br>

Continuities

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

Publication year

2025

Confidentiality

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

Name of the periodical

Aquaculture Reports

ISSN

2352-5134

e-ISSN

—

Volume of the periodical

42

Issue of the periodical within the volume

neuvedeno

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

9

Pages from-to

nestránkováno

UT code for WoS article

001458089500001

EID of the result in the Scopus database

2-s2.0-105000520911