The Pacific oyster (Magallana gigas): Can an invasive alien species be used as a sustainable and profitable novel ingredient in salmon feed?
The uncertainties regarding sustainability of feed ingredients used for the farming of Atlantic salmon (Salmo salar) are receiving increasing attention from stakeholders and policy makers. At the same time, the Pacific oyster (Magallana gigas) has invaded the Norwegian coast, potentially threatening...
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Norwegian University of Life Sciences
2023
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Online Access: | https://hdl.handle.net/11250/3076778 |
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ftunivmob:oai:nmbu.brage.unit.no:11250/3076778 2023-07-30T04:02:27+02:00 The Pacific oyster (Magallana gigas): Can an invasive alien species be used as a sustainable and profitable novel ingredient in salmon feed? Dalen, Lise Lotte Erlend Dancke Sandorf Trond M. Kortner 2023 application/pdf https://hdl.handle.net/11250/3076778 eng eng Norwegian University of Life Sciences no.nmbu:wiseflow:6839501:54591556 https://hdl.handle.net/11250/3076778 Master thesis 2023 ftunivmob 2023-07-12T22:47:31Z The uncertainties regarding sustainability of feed ingredients used for the farming of Atlantic salmon (Salmo salar) are receiving increasing attention from stakeholders and policy makers. At the same time, the Pacific oyster (Magallana gigas) has invaded the Norwegian coast, potentially threatening local biodiversity and the continuation of ecosystem services. The aim of this thesis was to provide a broad basis for assessing the opportunities and challenges of using the Pacific oyster as an ingredient in salmon feed. This was done to potentially mitigate the negative impacts of other commonly used feed ingredients such as fish meal and soy protein concentrate, while at the same time contributing to the management of an invasive alien species. To achieve this, the thesis includes a systematic literature review about the implications on sustainability from the invasion of the Pacific oyster and from common salmon feed ingredients. Semi-structured interviews were conducted with a representative from each of the four main salmon feed production companies in Norway, in addition to Petter Bjørge from the oyster harvesting company Storm Østers AS. It contains an analysis of the nutrient comparison of the dried Pacific oyster meal, soy protein concentrate and fish meal. The digestibility of the dried oyster meal was evaluated in a feeding trial using mink (Neovison vison) as a model animal for salmon, and compared with digestibility coefficients of soy protein concentrate and fish meal. On a dry matter basis, the Pacific oyster consisted of 49.3% crude protein, 20.4% ash, 8.2% fat and 0.71% EPA+DHA. When compared to requirement estimates of essential amino acids for salmon, the first limiting essential amino acids were phenylalanine and tyrosine, followed by methionine+cysteine, histidine and lysine. The apparent digestibility coefficient of crude protein was 79.5%. The nutrient profile was considered interesting but not optimal by the feed producers interviewed. The price per tonne dried oyster meal is 825,688 NOK, a ... Master Thesis Atlantic salmon Pacific oyster Salmo salar Open archive Norwegian University of Life Sciences: Brage NMBU Norway Pacific |
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Open archive Norwegian University of Life Sciences: Brage NMBU |
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ftunivmob |
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English |
description |
The uncertainties regarding sustainability of feed ingredients used for the farming of Atlantic salmon (Salmo salar) are receiving increasing attention from stakeholders and policy makers. At the same time, the Pacific oyster (Magallana gigas) has invaded the Norwegian coast, potentially threatening local biodiversity and the continuation of ecosystem services. The aim of this thesis was to provide a broad basis for assessing the opportunities and challenges of using the Pacific oyster as an ingredient in salmon feed. This was done to potentially mitigate the negative impacts of other commonly used feed ingredients such as fish meal and soy protein concentrate, while at the same time contributing to the management of an invasive alien species. To achieve this, the thesis includes a systematic literature review about the implications on sustainability from the invasion of the Pacific oyster and from common salmon feed ingredients. Semi-structured interviews were conducted with a representative from each of the four main salmon feed production companies in Norway, in addition to Petter Bjørge from the oyster harvesting company Storm Østers AS. It contains an analysis of the nutrient comparison of the dried Pacific oyster meal, soy protein concentrate and fish meal. The digestibility of the dried oyster meal was evaluated in a feeding trial using mink (Neovison vison) as a model animal for salmon, and compared with digestibility coefficients of soy protein concentrate and fish meal. On a dry matter basis, the Pacific oyster consisted of 49.3% crude protein, 20.4% ash, 8.2% fat and 0.71% EPA+DHA. When compared to requirement estimates of essential amino acids for salmon, the first limiting essential amino acids were phenylalanine and tyrosine, followed by methionine+cysteine, histidine and lysine. The apparent digestibility coefficient of crude protein was 79.5%. The nutrient profile was considered interesting but not optimal by the feed producers interviewed. The price per tonne dried oyster meal is 825,688 NOK, a ... |
author2 |
Erlend Dancke Sandorf Trond M. Kortner |
format |
Master Thesis |
author |
Dalen, Lise Lotte |
spellingShingle |
Dalen, Lise Lotte The Pacific oyster (Magallana gigas): Can an invasive alien species be used as a sustainable and profitable novel ingredient in salmon feed? |
author_facet |
Dalen, Lise Lotte |
author_sort |
Dalen, Lise Lotte |
title |
The Pacific oyster (Magallana gigas): Can an invasive alien species be used as a sustainable and profitable novel ingredient in salmon feed? |
title_short |
The Pacific oyster (Magallana gigas): Can an invasive alien species be used as a sustainable and profitable novel ingredient in salmon feed? |
title_full |
The Pacific oyster (Magallana gigas): Can an invasive alien species be used as a sustainable and profitable novel ingredient in salmon feed? |
title_fullStr |
The Pacific oyster (Magallana gigas): Can an invasive alien species be used as a sustainable and profitable novel ingredient in salmon feed? |
title_full_unstemmed |
The Pacific oyster (Magallana gigas): Can an invasive alien species be used as a sustainable and profitable novel ingredient in salmon feed? |
title_sort |
pacific oyster (magallana gigas): can an invasive alien species be used as a sustainable and profitable novel ingredient in salmon feed? |
publisher |
Norwegian University of Life Sciences |
publishDate |
2023 |
url |
https://hdl.handle.net/11250/3076778 |
geographic |
Norway Pacific |
geographic_facet |
Norway Pacific |
genre |
Atlantic salmon Pacific oyster Salmo salar |
genre_facet |
Atlantic salmon Pacific oyster Salmo salar |
op_relation |
no.nmbu:wiseflow:6839501:54591556 https://hdl.handle.net/11250/3076778 |
_version_ |
1772813253542412288 |