Assessment of growth performance and liver lipid accumulation in Atlantic salmon (Salmo salar) fed an insect-based diet
Increase in price and reduced availability of fish meal (FM) has caused the aquaculture industry to look at alternative sources for nutrients for feed production. Vegetable protein sources can replace a substantial part of FM and has been doing so in recent years. Vegetable sources do, however, have...
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Language: | English |
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The University of Bergen
2018
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Online Access: | https://hdl.handle.net/1956/18090 |
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ftunivbergen:oai:bora.uib.no:1956/18090 2023-05-15T15:26:17+02:00 Assessment of growth performance and liver lipid accumulation in Atlantic salmon (Salmo salar) fed an insect-based diet Gjesdal, Petter 2018-06-25T22:00:13Z application/pdf https://hdl.handle.net/1956/18090 eng eng The University of Bergen https://hdl.handle.net/1956/18090 Copyright the Author. All rights reserved Atlanterhavslaks Forstoffer Lakseoppdrett Oppdrettslaks https://data.ub.uio.no/realfagstermer/c012698 https://data.ub.uio.no/realfagstermer/c012515 https://data.ub.uio.no/realfagstermer/c012751 https://data.ub.uio.no/realfagstermer/c013922 759906 Master thesis 2018 ftunivbergen 2023-03-14T17:44:44Z Increase in price and reduced availability of fish meal (FM) has caused the aquaculture industry to look at alternative sources for nutrients for feed production. Vegetable protein sources can replace a substantial part of FM and has been doing so in recent years. Vegetable sources do, however, have limitations due to an unbalanced amino acid (AA) profile, being high in fibre, antinutritional factors and competition with human consumption. Alternative sources for protein must be considered for increased flexibilities in future fish feed production. In this study, insect meal (IM) made from Black soldier fly (Hermetia illucens) pre pupae fed on brown algae (Ascophyllum nodosum) enriched medium was used to substitute 100% of the fishmeal in a diet for Atlantic salmon (Salmo salar) in seawater. Commercially available feed was used as control. The diets were balanced so no nutrient deficiencies were expected to have an impact on growth and other health parameters. After 16 weeks, fish length and weight were recorded and hepatic- and visceral somatic indices measured. No differences in growth and survival were discovered. The liver lipid accumulation was evaluated through histology to assess the size of hepatic lipid droplets and by lipid class analysis. Histology did not reveal any difference between the dietary groups in the size distribution of lipid droplets, and lipid class analysis did not show any significant differences in lipid class composition. In all, the IM based diet used in this trial showed great potential as feed in future Atlantic salmon farming. Masteroppgave i fiskehelse MAMN-FISK FISK399 Master Thesis Atlanterhavslaks Atlantic salmon Salmo salar University of Bergen: Bergen Open Research Archive (BORA-UiB) |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
Atlanterhavslaks Forstoffer Lakseoppdrett Oppdrettslaks https://data.ub.uio.no/realfagstermer/c012698 https://data.ub.uio.no/realfagstermer/c012515 https://data.ub.uio.no/realfagstermer/c012751 https://data.ub.uio.no/realfagstermer/c013922 759906 |
spellingShingle |
Atlanterhavslaks Forstoffer Lakseoppdrett Oppdrettslaks https://data.ub.uio.no/realfagstermer/c012698 https://data.ub.uio.no/realfagstermer/c012515 https://data.ub.uio.no/realfagstermer/c012751 https://data.ub.uio.no/realfagstermer/c013922 759906 Gjesdal, Petter Assessment of growth performance and liver lipid accumulation in Atlantic salmon (Salmo salar) fed an insect-based diet |
topic_facet |
Atlanterhavslaks Forstoffer Lakseoppdrett Oppdrettslaks https://data.ub.uio.no/realfagstermer/c012698 https://data.ub.uio.no/realfagstermer/c012515 https://data.ub.uio.no/realfagstermer/c012751 https://data.ub.uio.no/realfagstermer/c013922 759906 |
description |
Increase in price and reduced availability of fish meal (FM) has caused the aquaculture industry to look at alternative sources for nutrients for feed production. Vegetable protein sources can replace a substantial part of FM and has been doing so in recent years. Vegetable sources do, however, have limitations due to an unbalanced amino acid (AA) profile, being high in fibre, antinutritional factors and competition with human consumption. Alternative sources for protein must be considered for increased flexibilities in future fish feed production. In this study, insect meal (IM) made from Black soldier fly (Hermetia illucens) pre pupae fed on brown algae (Ascophyllum nodosum) enriched medium was used to substitute 100% of the fishmeal in a diet for Atlantic salmon (Salmo salar) in seawater. Commercially available feed was used as control. The diets were balanced so no nutrient deficiencies were expected to have an impact on growth and other health parameters. After 16 weeks, fish length and weight were recorded and hepatic- and visceral somatic indices measured. No differences in growth and survival were discovered. The liver lipid accumulation was evaluated through histology to assess the size of hepatic lipid droplets and by lipid class analysis. Histology did not reveal any difference between the dietary groups in the size distribution of lipid droplets, and lipid class analysis did not show any significant differences in lipid class composition. In all, the IM based diet used in this trial showed great potential as feed in future Atlantic salmon farming. Masteroppgave i fiskehelse MAMN-FISK FISK399 |
format |
Master Thesis |
author |
Gjesdal, Petter |
author_facet |
Gjesdal, Petter |
author_sort |
Gjesdal, Petter |
title |
Assessment of growth performance and liver lipid accumulation in Atlantic salmon (Salmo salar) fed an insect-based diet |
title_short |
Assessment of growth performance and liver lipid accumulation in Atlantic salmon (Salmo salar) fed an insect-based diet |
title_full |
Assessment of growth performance and liver lipid accumulation in Atlantic salmon (Salmo salar) fed an insect-based diet |
title_fullStr |
Assessment of growth performance and liver lipid accumulation in Atlantic salmon (Salmo salar) fed an insect-based diet |
title_full_unstemmed |
Assessment of growth performance and liver lipid accumulation in Atlantic salmon (Salmo salar) fed an insect-based diet |
title_sort |
assessment of growth performance and liver lipid accumulation in atlantic salmon (salmo salar) fed an insect-based diet |
publisher |
The University of Bergen |
publishDate |
2018 |
url |
https://hdl.handle.net/1956/18090 |
genre |
Atlanterhavslaks Atlantic salmon Salmo salar |
genre_facet |
Atlanterhavslaks Atlantic salmon Salmo salar |
op_relation |
https://hdl.handle.net/1956/18090 |
op_rights |
Copyright the Author. All rights reserved |
_version_ |
1766356794942160896 |