Salmon lice dispersion in a northern Norwegian fjord system and the impact of vertical movements

The abundance and distribution of salmon lice Lepeophtheirus salmons originating from fish farms in a northern Norwegian fjord during the summer of 2010 was investigated by means of a numerical model, underpinned by field observations. In order to evaluate the robustness of the simulated distributio...

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Autores principales:	IA Johnsen, LC Asplin, AD Sandvik, RM Serra-Llinares
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/363539986f954fb6b9a4c4cf42e64bca
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spelling	oai:doaj.org-article:363539986f954fb6b9a4c4cf42e64bca2021-11-04T10:28:44ZSalmon lice dispersion in a northern Norwegian fjord system and the impact of vertical movements1869-215X1869-753410.3354/aei00162https://doaj.org/article/363539986f954fb6b9a4c4cf42e64bca2016-02-01T00:00:00Zhttps://www.int-res.com/abstracts/aei/v8/p99-116/https://doaj.org/toc/1869-215Xhttps://doaj.org/toc/1869-7534The abundance and distribution of salmon lice Lepeophtheirus salmons originating from fish farms in a northern Norwegian fjord during the summer of 2010 was investigated by means of a numerical model, underpinned by field observations. In order to evaluate the robustness of the simulated distribution of the lice, we re-ran the simulation several times, changing the vertical responses of the lice to environmental cues such as light and turbulence, in addition to altering their vertical swimming velocity. The model was able to realistically reproduce the observed currents and stratification in the region. The simulated distribution of lice was not sensitive to different implementations of surface light nor to the light sensitivity level of the lice. However, the vertical swimming velocity and a mixing parameter influenced both their vertical distribution and horizontal dispersion. The aggregation of lice along land was influenced by their response to turbulent water. The simulated infectious stages of the lice were transported on average 20 to 45 km from their release site. The simulated concentrations of infectious lice varied in sync with lice infestations observed on wild fish in the area. Less than 1% of the simulated lice reached a farm site. The ratio between internal and external exposure ranged from 7 to 57%. Farms in the north of the fjord system were more exposed to lice released in the south than vice versa.IA JohnsenLC AsplinAD SandvikRM Serra-LlinaresInter-ResearcharticleAquaculture. Fisheries. AnglingSH1-691EcologyQH540-549.5ENAquaculture Environment Interactions, Vol 8, Pp 99-116 (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 IA Johnsen LC Asplin AD Sandvik RM Serra-Llinares Salmon lice dispersion in a northern Norwegian fjord system and the impact of vertical movements
description	The abundance and distribution of salmon lice Lepeophtheirus salmons originating from fish farms in a northern Norwegian fjord during the summer of 2010 was investigated by means of a numerical model, underpinned by field observations. In order to evaluate the robustness of the simulated distribution of the lice, we re-ran the simulation several times, changing the vertical responses of the lice to environmental cues such as light and turbulence, in addition to altering their vertical swimming velocity. The model was able to realistically reproduce the observed currents and stratification in the region. The simulated distribution of lice was not sensitive to different implementations of surface light nor to the light sensitivity level of the lice. However, the vertical swimming velocity and a mixing parameter influenced both their vertical distribution and horizontal dispersion. The aggregation of lice along land was influenced by their response to turbulent water. The simulated infectious stages of the lice were transported on average 20 to 45 km from their release site. The simulated concentrations of infectious lice varied in sync with lice infestations observed on wild fish in the area. Less than 1% of the simulated lice reached a farm site. The ratio between internal and external exposure ranged from 7 to 57%. Farms in the north of the fjord system were more exposed to lice released in the south than vice versa.
format	article
author	IA Johnsen LC Asplin AD Sandvik RM Serra-Llinares
author_facet	IA Johnsen LC Asplin AD Sandvik RM Serra-Llinares
author_sort	IA Johnsen
title	Salmon lice dispersion in a northern Norwegian fjord system and the impact of vertical movements
title_short	Salmon lice dispersion in a northern Norwegian fjord system and the impact of vertical movements
title_full	Salmon lice dispersion in a northern Norwegian fjord system and the impact of vertical movements
title_fullStr	Salmon lice dispersion in a northern Norwegian fjord system and the impact of vertical movements
title_full_unstemmed	Salmon lice dispersion in a northern Norwegian fjord system and the impact of vertical movements
title_sort	salmon lice dispersion in a northern norwegian fjord system and the impact of vertical movements
publisher	Inter-Research
publishDate	2016
url	https://doaj.org/article/363539986f954fb6b9a4c4cf42e64bca
work_keys_str_mv	AT iajohnsen salmonlicedispersioninanorthernnorwegianfjordsystemandtheimpactofverticalmovements AT lcasplin salmonlicedispersioninanorthernnorwegianfjordsystemandtheimpactofverticalmovements AT adsandvik salmonlicedispersioninanorthernnorwegianfjordsystemandtheimpactofverticalmovements AT rmserrallinares salmonlicedispersioninanorthernnorwegianfjordsystemandtheimpactofverticalmovements
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Salmon lice dispersion in a northern Norwegian fjord system and the impact of vertical movements

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