A method of estimating in situ salmon louse nauplii production at fish farms
Abundance and depth distribution of planktonic sea lice were investigated in relation to hydrodynamics and diurnal solar insolation at a salmon farm in Sundalagið, Faroe Islands. Plankton surveys were conducted by surface tows with a plankton net around the farm and by using a plankton pump at 1, 4...
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ftdoajarticles:oai:doaj.org/article:21cf0ca355804e86a79a12e92eeeb149 2023-05-15T16:10:54+02:00 A method of estimating in situ salmon louse nauplii production at fish farms G á Norði K Simonsen Ø Patursson 2016-07-01T00:00:00Z https://doi.org/10.3354/aei00185 https://doaj.org/article/21cf0ca355804e86a79a12e92eeeb149 EN eng Inter-Research https://www.int-res.com/abstracts/aei/v8/p397-405/ https://doaj.org/toc/1869-215X https://doaj.org/toc/1869-7534 1869-215X 1869-7534 doi:10.3354/aei00185 https://doaj.org/article/21cf0ca355804e86a79a12e92eeeb149 Aquaculture Environment Interactions, Vol 8, Pp 397-405 (2016) Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 article 2016 ftdoajarticles https://doi.org/10.3354/aei00185 2022-12-31T10:09:00Z Abundance and depth distribution of planktonic sea lice were investigated in relation to hydrodynamics and diurnal solar insolation at a salmon farm in Sundalagið, Faroe Islands. Plankton surveys were conducted by surface tows with a plankton net around the farm and by using a plankton pump at 1, 4 and 6 m depth in a fish cage. The entire sample content was investigated under a stereomicroscope and sea lice were identified. Sea lice of the species Lepeophtheirus salmonis and Caligus elongatus were present at the farm. Nauplii dominated the planktonic stages (>95%) while copepodids were absent from most samples. The highest observed copepodid density was 0.3 ind. m-3, which is within the range found in open water. No diurnal vertical distribution pattern was observed for salmon lice nauplii in the net cages, which were most abundant in the top meter of the water column, and density decreased with depth. At 1 m depth, nauplii density was inversely proportional to the current speed at the same depth. From this relation, and the abundance of adult female sea lice on the farmed fish, the in situ nauplii production was calculated to be within 26-68 nauplii female-1 d-1. The lower end of this range is similar to production rates suggested by laboratory studies at similar temperatures (7.8°C). Article in Journal/Newspaper Faroe Islands Directory of Open Access Journals: DOAJ Articles Faroe Islands Sundalagið ENVELOPE(-7.000,-7.000,62.200,62.200) Aquaculture Environment Interactions 8 397 405 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 |
spellingShingle |
Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 G á Norði K Simonsen Ø Patursson A method of estimating in situ salmon louse nauplii production at fish farms |
topic_facet |
Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 |
description |
Abundance and depth distribution of planktonic sea lice were investigated in relation to hydrodynamics and diurnal solar insolation at a salmon farm in Sundalagið, Faroe Islands. Plankton surveys were conducted by surface tows with a plankton net around the farm and by using a plankton pump at 1, 4 and 6 m depth in a fish cage. The entire sample content was investigated under a stereomicroscope and sea lice were identified. Sea lice of the species Lepeophtheirus salmonis and Caligus elongatus were present at the farm. Nauplii dominated the planktonic stages (>95%) while copepodids were absent from most samples. The highest observed copepodid density was 0.3 ind. m-3, which is within the range found in open water. No diurnal vertical distribution pattern was observed for salmon lice nauplii in the net cages, which were most abundant in the top meter of the water column, and density decreased with depth. At 1 m depth, nauplii density was inversely proportional to the current speed at the same depth. From this relation, and the abundance of adult female sea lice on the farmed fish, the in situ nauplii production was calculated to be within 26-68 nauplii female-1 d-1. The lower end of this range is similar to production rates suggested by laboratory studies at similar temperatures (7.8°C). |
format |
Article in Journal/Newspaper |
author |
G á Norði K Simonsen Ø Patursson |
author_facet |
G á Norði K Simonsen Ø Patursson |
author_sort |
G á Norði |
title |
A method of estimating in situ salmon louse nauplii production at fish farms |
title_short |
A method of estimating in situ salmon louse nauplii production at fish farms |
title_full |
A method of estimating in situ salmon louse nauplii production at fish farms |
title_fullStr |
A method of estimating in situ salmon louse nauplii production at fish farms |
title_full_unstemmed |
A method of estimating in situ salmon louse nauplii production at fish farms |
title_sort |
method of estimating in situ salmon louse nauplii production at fish farms |
publisher |
Inter-Research |
publishDate |
2016 |
url |
https://doi.org/10.3354/aei00185 https://doaj.org/article/21cf0ca355804e86a79a12e92eeeb149 |
long_lat |
ENVELOPE(-7.000,-7.000,62.200,62.200) |
geographic |
Faroe Islands Sundalagið |
geographic_facet |
Faroe Islands Sundalagið |
genre |
Faroe Islands |
genre_facet |
Faroe Islands |
op_source |
Aquaculture Environment Interactions, Vol 8, Pp 397-405 (2016) |
op_relation |
https://www.int-res.com/abstracts/aei/v8/p397-405/ https://doaj.org/toc/1869-215X https://doaj.org/toc/1869-7534 1869-215X 1869-7534 doi:10.3354/aei00185 https://doaj.org/article/21cf0ca355804e86a79a12e92eeeb149 |
op_doi |
https://doi.org/10.3354/aei00185 |
container_title |
Aquaculture Environment Interactions |
container_volume |
8 |
container_start_page |
397 |
op_container_end_page |
405 |
_version_ |
1765996040351121408 |