Treatment rates for sea lice of Scottish inshore marine salmon farms depend on local (sea loch) farmed salmon biomass and oceanography

Sea lice are the most damaging parasite of marine-farmed salmon. Lice are controlled largely by using medicines. Discharge consents limit the allowed medicine use and hence biomass of salmon that can be farmed. The local environment may be expected to play a role in determining the frequency of appl...

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Autores principales:	AG Murray, M Hall
Formato:	article
Lenguaje:	EN
Publicado:	Inter-Research 2014
Materias:	Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/dc9d34f9fd3b4c29b29921777d67252d
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spelling	oai:doaj.org-article:dc9d34f9fd3b4c29b29921777d67252d2021-11-17T10:10:05ZTreatment rates for sea lice of Scottish inshore marine salmon farms depend on local (sea loch) farmed salmon biomass and oceanography1869-215X1869-753410.3354/aei00099https://doaj.org/article/dc9d34f9fd3b4c29b29921777d67252d2014-05-01T00:00:00Zhttps://www.int-res.com/abstracts/aei/v5/n2/p117-125/https://doaj.org/toc/1869-215Xhttps://doaj.org/toc/1869-7534Sea lice are the most damaging parasite of marine-farmed salmon. Lice are controlled largely by using medicines. Discharge consents limit the allowed medicine use and hence biomass of salmon that can be farmed. The local environment may be expected to play a role in determining the frequency of application of these medicines on specific salmon farm sites. To assess this, we used data collected by the Scottish Environment Protection Agency on lice treatments and fish biomasses from 2005 to 2012 for salmon farm sites located within sea lochs (offshore sites are not included), together with local hydrographic data. There was relatively little variation in treatment rates between different sites within a loch, so a loch (or larger unit) is the appropriate area for analysis of factors influencing these treatment rates. Treatment rates tended to increase with the loch’s total biomass of farmed salmon. Dependence of treatment rate on loch flushing time was highly significant in all regions; however, dependence was positive in the Northern and Western Isles but negative in mainland Scotland. A possible explanation is flushing of lice away from island sea lochs but into mainland sea lochs, in line with prevailing currents. Regional variation in dependence suggests that oceanographic processes at larger spatial scales play a significant role in determining lice dynamics.AG MurrayM HallInter-ResearcharticleAquaculture. Fisheries. AnglingSH1-691EcologyQH540-549.5ENAquaculture Environment Interactions, Vol 5, Iss 2, Pp 117-125 (2014)
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 AG Murray M Hall Treatment rates for sea lice of Scottish inshore marine salmon farms depend on local (sea loch) farmed salmon biomass and oceanography
description	Sea lice are the most damaging parasite of marine-farmed salmon. Lice are controlled largely by using medicines. Discharge consents limit the allowed medicine use and hence biomass of salmon that can be farmed. The local environment may be expected to play a role in determining the frequency of application of these medicines on specific salmon farm sites. To assess this, we used data collected by the Scottish Environment Protection Agency on lice treatments and fish biomasses from 2005 to 2012 for salmon farm sites located within sea lochs (offshore sites are not included), together with local hydrographic data. There was relatively little variation in treatment rates between different sites within a loch, so a loch (or larger unit) is the appropriate area for analysis of factors influencing these treatment rates. Treatment rates tended to increase with the loch’s total biomass of farmed salmon. Dependence of treatment rate on loch flushing time was highly significant in all regions; however, dependence was positive in the Northern and Western Isles but negative in mainland Scotland. A possible explanation is flushing of lice away from island sea lochs but into mainland sea lochs, in line with prevailing currents. Regional variation in dependence suggests that oceanographic processes at larger spatial scales play a significant role in determining lice dynamics.
format	article
author	AG Murray M Hall
author_facet	AG Murray M Hall
author_sort	AG Murray
title	Treatment rates for sea lice of Scottish inshore marine salmon farms depend on local (sea loch) farmed salmon biomass and oceanography
title_short	Treatment rates for sea lice of Scottish inshore marine salmon farms depend on local (sea loch) farmed salmon biomass and oceanography
title_full	Treatment rates for sea lice of Scottish inshore marine salmon farms depend on local (sea loch) farmed salmon biomass and oceanography
title_fullStr	Treatment rates for sea lice of Scottish inshore marine salmon farms depend on local (sea loch) farmed salmon biomass and oceanography
title_full_unstemmed	Treatment rates for sea lice of Scottish inshore marine salmon farms depend on local (sea loch) farmed salmon biomass and oceanography
title_sort	treatment rates for sea lice of scottish inshore marine salmon farms depend on local (sea loch) farmed salmon biomass and oceanography
publisher	Inter-Research
publishDate	2014
url	https://doaj.org/article/dc9d34f9fd3b4c29b29921777d67252d
work_keys_str_mv	AT agmurray treatmentratesforsealiceofscottishinshoremarinesalmonfarmsdependonlocalsealochfarmedsalmonbiomassandoceanography AT mhall treatmentratesforsealiceofscottishinshoremarinesalmonfarmsdependonlocalsealochfarmedsalmonbiomassandoceanography
_version_	1718425640738226176

Treatment rates for sea lice of Scottish inshore marine salmon farms depend on local (sea loch) farmed salmon biomass and oceanography

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