Harvesting wild Pacific oysters, Crassostrea gigas – developing methods for locating and live-storing marketable individuals.
Invasive species has transformed marine habitats all around the world, and will likely continue to do so due to both natural and anthropogenic factors. Invasive species are usually seen as a threat and considered harmful, there are however also species that could be considered to have a positive imp...
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Format: | Bachelor Thesis |
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Yrkeshögskolan Novia
2017
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Online Access: | http://www.theseus.fi/handle/10024/129818 |
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fttheseus:oai:www.theseus.fi:10024/129818 2024-02-11T10:03:03+01:00 Harvesting wild Pacific oysters, Crassostrea gigas – developing methods for locating and live-storing marketable individuals. Hanstén, Magnus Yrkeshögskolan Novia 2017 http://www.theseus.fi/handle/10024/129818 eng eng Yrkeshögskolan Novia URN:NBN:fi:amk-2017052910936 http://www.theseus.fi/handle/10024/129818 10024/88978 All rights reserved oyster Crassostrea Gigas live-storage fi=Luonnonvara- ja ympäristöala|sv=Bioekonomi och Miljöbranschen|en=Natural Resources and Environment| Sustainable coastal management fi=AMK-opinnäytetyö|sv=YH-examensarbete|en=Bachelor's thesis| 2017 fttheseus 2024-01-25T00:13:56Z Invasive species has transformed marine habitats all around the world, and will likely continue to do so due to both natural and anthropogenic factors. Invasive species are usually seen as a threat and considered harmful, there are however also species that could be considered to have a positive impact. One of these species is the Pacific oyster (Crassostrea gigas), an oyster species native to the Pacific coast of Asia that recently arrived in the Swedish west coast. Local bodies have expressed an interest in creating a market of these Pacific oysters growing in the wild. In order to evaluate if such a market is possible a field survey was conducted to determine in which population densities most marketable oysters could be found. Further, a live-storage method was tested, lowering the oysters into different depths to ensure a fresh supply of oysters throughout the summer. The result shows an abundance of marketable individuals, with a slight decrease in number in higher population densities. The live-storage trial showed a positive outcome at the deepest depth (14m), where the oysters increased in both size and weight and the mortality level was low. The result indicates that a market of the wild Pacific oyster is possible, and that a live storage method would be a suitable option on the west coast of Sweden. Bachelor Thesis Crassostrea gigas Pacific oyster Theseus.fi (Open Repository of the Universities of Applied Sciences) Pacific |
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Open Polar |
collection |
Theseus.fi (Open Repository of the Universities of Applied Sciences) |
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fttheseus |
language |
English |
topic |
oyster Crassostrea Gigas live-storage fi=Luonnonvara- ja ympäristöala|sv=Bioekonomi och Miljöbranschen|en=Natural Resources and Environment| Sustainable coastal management |
spellingShingle |
oyster Crassostrea Gigas live-storage fi=Luonnonvara- ja ympäristöala|sv=Bioekonomi och Miljöbranschen|en=Natural Resources and Environment| Sustainable coastal management Hanstén, Magnus Harvesting wild Pacific oysters, Crassostrea gigas – developing methods for locating and live-storing marketable individuals. |
topic_facet |
oyster Crassostrea Gigas live-storage fi=Luonnonvara- ja ympäristöala|sv=Bioekonomi och Miljöbranschen|en=Natural Resources and Environment| Sustainable coastal management |
description |
Invasive species has transformed marine habitats all around the world, and will likely continue to do so due to both natural and anthropogenic factors. Invasive species are usually seen as a threat and considered harmful, there are however also species that could be considered to have a positive impact. One of these species is the Pacific oyster (Crassostrea gigas), an oyster species native to the Pacific coast of Asia that recently arrived in the Swedish west coast. Local bodies have expressed an interest in creating a market of these Pacific oysters growing in the wild. In order to evaluate if such a market is possible a field survey was conducted to determine in which population densities most marketable oysters could be found. Further, a live-storage method was tested, lowering the oysters into different depths to ensure a fresh supply of oysters throughout the summer. The result shows an abundance of marketable individuals, with a slight decrease in number in higher population densities. The live-storage trial showed a positive outcome at the deepest depth (14m), where the oysters increased in both size and weight and the mortality level was low. The result indicates that a market of the wild Pacific oyster is possible, and that a live storage method would be a suitable option on the west coast of Sweden. |
author2 |
Yrkeshögskolan Novia |
format |
Bachelor Thesis |
author |
Hanstén, Magnus |
author_facet |
Hanstén, Magnus |
author_sort |
Hanstén, Magnus |
title |
Harvesting wild Pacific oysters, Crassostrea gigas – developing methods for locating and live-storing marketable individuals. |
title_short |
Harvesting wild Pacific oysters, Crassostrea gigas – developing methods for locating and live-storing marketable individuals. |
title_full |
Harvesting wild Pacific oysters, Crassostrea gigas – developing methods for locating and live-storing marketable individuals. |
title_fullStr |
Harvesting wild Pacific oysters, Crassostrea gigas – developing methods for locating and live-storing marketable individuals. |
title_full_unstemmed |
Harvesting wild Pacific oysters, Crassostrea gigas – developing methods for locating and live-storing marketable individuals. |
title_sort |
harvesting wild pacific oysters, crassostrea gigas – developing methods for locating and live-storing marketable individuals. |
publisher |
Yrkeshögskolan Novia |
publishDate |
2017 |
url |
http://www.theseus.fi/handle/10024/129818 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Crassostrea gigas Pacific oyster |
genre_facet |
Crassostrea gigas Pacific oyster |
op_relation |
URN:NBN:fi:amk-2017052910936 http://www.theseus.fi/handle/10024/129818 10024/88978 |
op_rights |
All rights reserved |
_version_ |
1790599186908971008 |