Effect of Season and Increased Temperature on Survival, Roe Enhancement, and Reproductive Cycle of the Green Sea Urchin (Strongylocentrotus droebachiensis) Collected from Four Relatively Close Sites in Northern Norway
A series of three trials were conducted in the North of Norway at different times of the year. The trials consisted of harvesting sea urchins from four sites, situated within 5 km of each other and then holding them in land-based enhancement facilities. They were held at ambient seawater temperature...
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Online Access: | https://hdl.handle.net/11250/3065479 https://doi.org/10.1155/2023/6360865 |
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ftnofima:oai:nofima.brage.unit.no:11250/3065479 2023-06-11T04:15:21+02:00 Effect of Season and Increased Temperature on Survival, Roe Enhancement, and Reproductive Cycle of the Green Sea Urchin (Strongylocentrotus droebachiensis) Collected from Four Relatively Close Sites in Northern Norway James, Philip Evensen, Tor Hatten Johansson, Gunhild Seljehaug 2023 application/pdf https://hdl.handle.net/11250/3065479 https://doi.org/10.1155/2023/6360865 eng eng Nofima AS: 12934 EC/H2020/311736 Hindawi (Case Reports in Immunology). 2023, 2023 1-10. https://hdl.handle.net/11250/3065479 https://doi.org/10.1155/2023/6360865 cristin:2143836 1-10 2023 Hindawi (Case Reports in Immunology) Journal article 2023 ftnofima https://doi.org/10.1155/2023/6360865 2023-05-03T22:49:00Z A series of three trials were conducted in the North of Norway at different times of the year. The trials consisted of harvesting sea urchins from four sites, situated within 5 km of each other and then holding them in land-based enhancement facilities. They were held at ambient seawater temperatures as well as ambient plus 3.0°C. Samples were taken from the wild at the time of collection and at the end of the enhancement period as well as from the enhanced sea urchins from each site. Results showed that utilising the sea urchins from a variety of sites, even from areas where there is an abundance of sea urchins (sea urchin barrens) and the Gonad Index (GI) is almost always low, is viable in terms of the final, post roe enhancement GI. The results of the study indicate that differences in initial and final GI and the increase in GI between the sites, despite the relatively close proximity, show site selection is most likely not as important as ease of harvesting and sea urchin availability and the positive environmental impact from removal of sea urchins and these are the factors that harvesting strategies should focus on. The study has shown that it is possible to have a relatively consistent roe enhancement from S. droebachiensis from the North of Norway regardless of seasonality (time of year), site selection, and initial GI. Relatively small changes (up to 3°C) in the seawater temperature appear to have a slightly negative impact on enhancement efforts. However, this may vary when larger differences in temperature are experienced. Effect of Season and Increased Temperature on Survival, Roe Enhancement, and Reproductive Cycle of the Green Sea Urchin (Strongylocentrotus droebachiensis) Collected from Four Relatively Close Sites in Northern Norway publishedVersion Article in Journal/Newspaper Northern Norway Nofima Knowledge Archive (Brage) Norway Aquaculture Research 2023 1 10 |
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Open Polar |
collection |
Nofima Knowledge Archive (Brage) |
op_collection_id |
ftnofima |
language |
English |
description |
A series of three trials were conducted in the North of Norway at different times of the year. The trials consisted of harvesting sea urchins from four sites, situated within 5 km of each other and then holding them in land-based enhancement facilities. They were held at ambient seawater temperatures as well as ambient plus 3.0°C. Samples were taken from the wild at the time of collection and at the end of the enhancement period as well as from the enhanced sea urchins from each site. Results showed that utilising the sea urchins from a variety of sites, even from areas where there is an abundance of sea urchins (sea urchin barrens) and the Gonad Index (GI) is almost always low, is viable in terms of the final, post roe enhancement GI. The results of the study indicate that differences in initial and final GI and the increase in GI between the sites, despite the relatively close proximity, show site selection is most likely not as important as ease of harvesting and sea urchin availability and the positive environmental impact from removal of sea urchins and these are the factors that harvesting strategies should focus on. The study has shown that it is possible to have a relatively consistent roe enhancement from S. droebachiensis from the North of Norway regardless of seasonality (time of year), site selection, and initial GI. Relatively small changes (up to 3°C) in the seawater temperature appear to have a slightly negative impact on enhancement efforts. However, this may vary when larger differences in temperature are experienced. Effect of Season and Increased Temperature on Survival, Roe Enhancement, and Reproductive Cycle of the Green Sea Urchin (Strongylocentrotus droebachiensis) Collected from Four Relatively Close Sites in Northern Norway publishedVersion |
format |
Article in Journal/Newspaper |
author |
James, Philip Evensen, Tor Hatten Johansson, Gunhild Seljehaug |
spellingShingle |
James, Philip Evensen, Tor Hatten Johansson, Gunhild Seljehaug Effect of Season and Increased Temperature on Survival, Roe Enhancement, and Reproductive Cycle of the Green Sea Urchin (Strongylocentrotus droebachiensis) Collected from Four Relatively Close Sites in Northern Norway |
author_facet |
James, Philip Evensen, Tor Hatten Johansson, Gunhild Seljehaug |
author_sort |
James, Philip |
title |
Effect of Season and Increased Temperature on Survival, Roe Enhancement, and Reproductive Cycle of the Green Sea Urchin (Strongylocentrotus droebachiensis) Collected from Four Relatively Close Sites in Northern Norway |
title_short |
Effect of Season and Increased Temperature on Survival, Roe Enhancement, and Reproductive Cycle of the Green Sea Urchin (Strongylocentrotus droebachiensis) Collected from Four Relatively Close Sites in Northern Norway |
title_full |
Effect of Season and Increased Temperature on Survival, Roe Enhancement, and Reproductive Cycle of the Green Sea Urchin (Strongylocentrotus droebachiensis) Collected from Four Relatively Close Sites in Northern Norway |
title_fullStr |
Effect of Season and Increased Temperature on Survival, Roe Enhancement, and Reproductive Cycle of the Green Sea Urchin (Strongylocentrotus droebachiensis) Collected from Four Relatively Close Sites in Northern Norway |
title_full_unstemmed |
Effect of Season and Increased Temperature on Survival, Roe Enhancement, and Reproductive Cycle of the Green Sea Urchin (Strongylocentrotus droebachiensis) Collected from Four Relatively Close Sites in Northern Norway |
title_sort |
effect of season and increased temperature on survival, roe enhancement, and reproductive cycle of the green sea urchin (strongylocentrotus droebachiensis) collected from four relatively close sites in northern norway |
publishDate |
2023 |
url |
https://hdl.handle.net/11250/3065479 https://doi.org/10.1155/2023/6360865 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Northern Norway |
genre_facet |
Northern Norway |
op_source |
1-10 2023 Hindawi (Case Reports in Immunology) |
op_relation |
Nofima AS: 12934 EC/H2020/311736 Hindawi (Case Reports in Immunology). 2023, 2023 1-10. https://hdl.handle.net/11250/3065479 https://doi.org/10.1155/2023/6360865 cristin:2143836 |
op_doi |
https://doi.org/10.1155/2023/6360865 |
container_title |
Aquaculture Research |
container_volume |
2023 |
container_start_page |
1 |
op_container_end_page |
10 |
_version_ |
1768372090859159552 |