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...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	G á Norði, K Simonsen, Ø Patursson
Formato:	article
Lenguaje:	EN
Publicado:	Inter-Research 2016
Materias:	Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/21cf0ca355804e86a79a12e92eeeb149
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:21cf0ca355804e86a79a12e92eeeb149
record_format	dspace
spelling	oai:doaj.org-article:21cf0ca355804e86a79a12e92eeeb1492021-11-11T11:04:33ZA method of estimating in situ salmon louse nauplii production at fish farms1869-215X1869-753410.3354/aei00185https://doaj.org/article/21cf0ca355804e86a79a12e92eeeb1492016-07-01T00:00:00Zhttps://www.int-res.com/abstracts/aei/v8/p397-405/https://doaj.org/toc/1869-215Xhttps://doaj.org/toc/1869-7534Abundance 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).G á NorðiK SimonsenØ PaturssonInter-ResearcharticleAquaculture. Fisheries. AnglingSH1-691EcologyQH540-549.5ENAquaculture Environment Interactions, Vol 8, Pp 397-405 (2016)
institution	DOAJ
collection	DOAJ
language	EN
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
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
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://doaj.org/article/21cf0ca355804e86a79a12e92eeeb149
work_keys_str_mv	AT ganorði amethodofestimatinginsitusalmonlousenaupliiproductionatfishfarms AT ksimonsen amethodofestimatinginsitusalmonlousenaupliiproductionatfishfarms AT øpatursson amethodofestimatinginsitusalmonlousenaupliiproductionatfishfarms AT ganorði methodofestimatinginsitusalmonlousenaupliiproductionatfishfarms AT ksimonsen methodofestimatinginsitusalmonlousenaupliiproductionatfishfarms AT øpatursson methodofestimatinginsitusalmonlousenaupliiproductionatfishfarms
_version_	1718439108653613056

A method of estimating in situ salmon louse nauplii production at fish farms

Ejemplares similares