Abundance and distribution of planktonic Lepeophtheirus salmonis and Caligus elongatus in a fish farming region in the Faroe Islands
The abundance of planktonic sea lice in the surface waters of the strait of Sundalagið, Faroe Islands was investigated from November 2013 to June 2014. The strait is 38 km long and hosts 6 salmon farms with coordinated farming cycles. The spatial distribution of planktonic sea lice for the entire st...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Inter-Research
2015-06-01
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| Series: | Aquaculture Environment Interactions |
| Online Access: | https://www.int-res.com/abstracts/aei/v7/n1/p15-27/ |
| _version_ | 1818933849972801536 |
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| author | G á Norði K Simonsen E Danielsen K Eliasen A Mols-Mortensen DH Christiansen P Steingrund M Galbraith Ø Patursson |
| author_facet | G á Norði K Simonsen E Danielsen K Eliasen A Mols-Mortensen DH Christiansen P Steingrund M Galbraith Ø Patursson |
| author_sort | G á Norði |
| collection | DOAJ |
| description | The abundance of planktonic sea lice in the surface waters of the strait of Sundalagið, Faroe Islands was investigated from November 2013 to June 2014. The strait is 38 km long and hosts 6 salmon farms with coordinated farming cycles. The spatial distribution of planktonic sea lice for the entire strait was examined in 2 surveys with different wind and hydrographic conditions. Temporal changes were investigated every 2-3 wk at 3 set stations throughout the study. The spatial distribution of Lepeophtheirus salmonis copepodids was clearly influenced by the actual wind direction, as the copepodids were found where winds pushed surface waters towards the shore. The same spatial pattern was not found for Caligus elongatus copepodids. This might be related to a different vertical migration pattern. The abundance of C. elongatus was seasonal. It was the dominant planktonic sea louse during winter, with a mean abundance of 0.34 ± 0.13 ind. m-3, and was virtually absent during summer. Lepeophtheirus salmonis was present throughout the study, except during the last survey when the coordinated farming sites lay fallow. During winter when the warmest seawater was deep in the water column, L. salmonis copepodids were present in 47% of the samples and nauplii were only observed in 9%. In samples where the highest seawater temperature was at the surface, nauplii prevalence attained a high value of 53%, while copepodid prevalence increased to 60%. These results indicate that nauplii might actively seek the highest possible seawater temperature. |
| first_indexed | 2024-12-20T04:54:55Z |
| format | Article |
| id | doaj.art-64856d29822541698bbf7ac509d684ae |
| institution | Directory Open Access Journal |
| issn | 1869-215X 1869-7534 |
| language | English |
| last_indexed | 2024-12-20T04:54:55Z |
| publishDate | 2015-06-01 |
| publisher | Inter-Research |
| record_format | Article |
| series | Aquaculture Environment Interactions |
| spelling | doaj.art-64856d29822541698bbf7ac509d684ae2022-12-21T19:52:44ZengInter-ResearchAquaculture Environment Interactions1869-215X1869-75342015-06-0171152710.3354/aei00134Abundance and distribution of planktonic Lepeophtheirus salmonis and Caligus elongatus in a fish farming region in the Faroe IslandsG á Norði0K Simonsen1E Danielsen2K Eliasen3A Mols-Mortensen4DH Christiansen5P Steingrund6M Galbraith7Ø Patursson8Fiskaaling - Aquaculture Research Station of the Faroes, við Áir, 430 Hvalvík, Faroe IslandsFiskaaling - Aquaculture Research Station of the Faroes, við Áir, 430 Hvalvík, Faroe IslandsFiskaaling - Aquaculture Research Station of the Faroes, við Áir, 430 Hvalvík, Faroe IslandsFiskaaling - Aquaculture Research Station of the Faroes, við Áir, 430 Hvalvík, Faroe IslandsFiskaaling - Aquaculture Research Station of the Faroes, við Áir, 430 Hvalvík, Faroe IslandsFaroese Food- and Veterinary Authority, V. U. Hammershaimbsgøta 11, 100 Tórshavn, Faroe IslandsFaroe Marine Research Institute, Nóatún 1, 100 Tórshavn, Faroe IslandsFisheries and Oceans Canada, Institute of Ocean Sciences, 9860 West Saanich Road, Sidney, British Columbia W8L 4B2, CanadaFiskaaling - Aquaculture Research Station of the Faroes, við Áir, 430 Hvalvík, Faroe IslandsThe abundance of planktonic sea lice in the surface waters of the strait of Sundalagið, Faroe Islands was investigated from November 2013 to June 2014. The strait is 38 km long and hosts 6 salmon farms with coordinated farming cycles. The spatial distribution of planktonic sea lice for the entire strait was examined in 2 surveys with different wind and hydrographic conditions. Temporal changes were investigated every 2-3 wk at 3 set stations throughout the study. The spatial distribution of Lepeophtheirus salmonis copepodids was clearly influenced by the actual wind direction, as the copepodids were found where winds pushed surface waters towards the shore. The same spatial pattern was not found for Caligus elongatus copepodids. This might be related to a different vertical migration pattern. The abundance of C. elongatus was seasonal. It was the dominant planktonic sea louse during winter, with a mean abundance of 0.34 ± 0.13 ind. m-3, and was virtually absent during summer. Lepeophtheirus salmonis was present throughout the study, except during the last survey when the coordinated farming sites lay fallow. During winter when the warmest seawater was deep in the water column, L. salmonis copepodids were present in 47% of the samples and nauplii were only observed in 9%. In samples where the highest seawater temperature was at the surface, nauplii prevalence attained a high value of 53%, while copepodid prevalence increased to 60%. These results indicate that nauplii might actively seek the highest possible seawater temperature.https://www.int-res.com/abstracts/aei/v7/n1/p15-27/ |
| spellingShingle | G á Norði K Simonsen E Danielsen K Eliasen A Mols-Mortensen DH Christiansen P Steingrund M Galbraith Ø Patursson Abundance and distribution of planktonic Lepeophtheirus salmonis and Caligus elongatus in a fish farming region in the Faroe Islands Aquaculture Environment Interactions |
| title | Abundance and distribution of planktonic Lepeophtheirus salmonis and Caligus elongatus in a fish farming region in the Faroe Islands |
| title_full | Abundance and distribution of planktonic Lepeophtheirus salmonis and Caligus elongatus in a fish farming region in the Faroe Islands |
| title_fullStr | Abundance and distribution of planktonic Lepeophtheirus salmonis and Caligus elongatus in a fish farming region in the Faroe Islands |
| title_full_unstemmed | Abundance and distribution of planktonic Lepeophtheirus salmonis and Caligus elongatus in a fish farming region in the Faroe Islands |
| title_short | Abundance and distribution of planktonic Lepeophtheirus salmonis and Caligus elongatus in a fish farming region in the Faroe Islands |
| title_sort | abundance and distribution of planktonic lepeophtheirus salmonis and caligus elongatus in a fish farming region in the faroe islands |
| url | https://www.int-res.com/abstracts/aei/v7/n1/p15-27/ |
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