A new strategy in rearing of European flounder:: using live Enchytraeus albidus to enhance juvenile growth

Mathias Engell Dahl Holmstrup; Stefan Frey Gadeberg; K. Engell-Sørensen; Stine Slotsbo; Martin Holmstrup

doi:10.3920/JIFF2021.0106

A new strategy in rearing of European flounder: using live Enchytraeus albidus to enhance juvenile growth

Mathias Engell Dahl Holmstrup, Stefan Frey Gadeberg, K. Engell-Sørensen, Stine Slotsbo, Martin Holmstrup^*

^*Corresponding author for this work

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

6 Citations (Scopus)

Abstract

This study reports the use of the annelid worm Enchytraeus albidus as a live feed for reared juvenile European flounder, Platichthys flesus. We investigated growth, lipid composition and mortality in small scale (hundreds of fish) and large scale (thousands of fish) rearing. Live Enchytraeus had a relatively low content of the essential omega-3 fatty acid, docosahexaenoic acid (DHA), but similar levels of other essential fatty acids and amino acids as the normally used commercial dry feed. Despite low DHA levels in live worms, juvenile flounder fed Enchytraeus grew twice as fast as fish fed commercial dry feed. DHA levels in membrane phospholipids of juvenile flounder became depleted when fed Enchytraeus, but this had no apparent negative consequences for development or health of the fish. Our study suggests that the use of Enchytraeus as a live feed for European flounder is feasible at a large scale.

Original language	English
Journal	Journal of Insects as Food and Feed
Volume	8
Issue	11
Pages (from-to)	1333-1341
Number of pages	9
ISSN	2352-4588
DOIs	https://doi.org/10.3920/JIFF2021.0106
Publication status	Published - 2022

Keywords

Aquaculture
Fatty acids
Flatfish
Growth performance
Invertebrates
Live feed

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title = "A new strategy in rearing of European flounder:: using live Enchytraeus albidus to enhance juvenile growth",

abstract = "This study reports the use of the annelid worm Enchytraeus albidus as a live feed for reared juvenile European flounder, Platichthys flesus. We investigated growth, lipid composition and mortality in small scale (hundreds of fish) and large scale (thousands of fish) rearing. Live Enchytraeus had a relatively low content of the essential omega-3 fatty acid, docosahexaenoic acid (DHA), but similar levels of other essential fatty acids and amino acids as the normally used commercial dry feed. Despite low DHA levels in live worms, juvenile flounder fed Enchytraeus grew twice as fast as fish fed commercial dry feed. DHA levels in membrane phospholipids of juvenile flounder became depleted when fed Enchytraeus, but this had no apparent negative consequences for development or health of the fish. Our study suggests that the use of Enchytraeus as a live feed for European flounder is feasible at a large scale.",

keywords = "Aquaculture, Fatty acids, Flatfish, Growth performance, Invertebrates, Live feed",

author = "Holmstrup, \{Mathias Engell Dahl\} and Gadeberg, \{Stefan Frey\} and K. Engell-S{\o}rensen and Stine Slotsbo and Martin Holmstrup",

year = "2022",

doi = "10.3920/JIFF2021.0106",

language = "English",

volume = "8",

pages = "1333--1341",

journal = "Journal of Insects as Food and Feed",

issn = "2352-4588",

publisher = "Wageningen Academic Publishers",

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}

A new strategy in rearing of European flounder: using live Enchytraeus albidus to enhance juvenile growth. / Holmstrup, Mathias Engell Dahl; Gadeberg, Stefan Frey; Engell-Sørensen, K. et al.
In: Journal of Insects as Food and Feed, Vol. 8, No. 11, 2022, p. 1333-1341.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

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AU - Holmstrup, Mathias Engell Dahl

AU - Gadeberg, Stefan Frey

AU - Engell-Sørensen, K.

AU - Slotsbo, Stine

AU - Holmstrup, Martin

PY - 2022

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N2 - This study reports the use of the annelid worm Enchytraeus albidus as a live feed for reared juvenile European flounder, Platichthys flesus. We investigated growth, lipid composition and mortality in small scale (hundreds of fish) and large scale (thousands of fish) rearing. Live Enchytraeus had a relatively low content of the essential omega-3 fatty acid, docosahexaenoic acid (DHA), but similar levels of other essential fatty acids and amino acids as the normally used commercial dry feed. Despite low DHA levels in live worms, juvenile flounder fed Enchytraeus grew twice as fast as fish fed commercial dry feed. DHA levels in membrane phospholipids of juvenile flounder became depleted when fed Enchytraeus, but this had no apparent negative consequences for development or health of the fish. Our study suggests that the use of Enchytraeus as a live feed for European flounder is feasible at a large scale.

AB - This study reports the use of the annelid worm Enchytraeus albidus as a live feed for reared juvenile European flounder, Platichthys flesus. We investigated growth, lipid composition and mortality in small scale (hundreds of fish) and large scale (thousands of fish) rearing. Live Enchytraeus had a relatively low content of the essential omega-3 fatty acid, docosahexaenoic acid (DHA), but similar levels of other essential fatty acids and amino acids as the normally used commercial dry feed. Despite low DHA levels in live worms, juvenile flounder fed Enchytraeus grew twice as fast as fish fed commercial dry feed. DHA levels in membrane phospholipids of juvenile flounder became depleted when fed Enchytraeus, but this had no apparent negative consequences for development or health of the fish. Our study suggests that the use of Enchytraeus as a live feed for European flounder is feasible at a large scale.

KW - Aquaculture

KW - Fatty acids

KW - Flatfish

KW - Growth performance

KW - Invertebrates

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