First report of winter epizootic of salmon lice on sea trout in Norway

Here we report on the first observation of a winter epizootic of salmon lice Lepeophtheirus salmonis Krøyer on sea trout Salmo trutta Linnaeus in a Norwegian fjord with intensive salmon farming. Trouts were sampled and counts of lice in the field were made for 2 consecutive winter seasons with trap...

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Autores principales:	KW Vollset, BT Barlaup
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/60e75a0727674064a7d788fe090cb6c5
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spelling	oai:doaj.org-article:60e75a0727674064a7d788fe090cb6c52021-11-17T10:11:35ZFirst report of winter epizootic of salmon lice on sea trout in Norway1869-215X1869-753410.3354/aei00110https://doaj.org/article/60e75a0727674064a7d788fe090cb6c52014-09-01T00:00:00Zhttps://www.int-res.com/abstracts/aei/v5/n3/p249-253/https://doaj.org/toc/1869-215Xhttps://doaj.org/toc/1869-7534Here we report on the first observation of a winter epizootic of salmon lice Lepeophtheirus salmonis Krøyer on sea trout Salmo trutta Linnaeus in a Norwegian fjord with intensive salmon farming. Trouts were sampled and counts of lice in the field were made for 2 consecutive winter seasons with trap nets in 2013 and 2014 just inside and outside the border to the National Salmon Fjord in Sognefjorden, western Norway. The aim of the study was to document potential epizootic outbreaks during the winter months. Following reports and field registrations of high abundance of lice in February and early March 2014, 12 and 14 fish were sampled from the 2 locations between 9 and 24 March and analyzed in the laboratory. Prevalence of sea lice on sampled fish inside and outside the fjord was 100 and 74%, with a mean abundance of 254.3 and 26.8 and a mean average intensity of 254.3 (max = 759) and 37.5 (max = 188), respectively. Chalimus stages dominated on the fish. In comparison, prevalence and abundance based on field observations in 2013 were low and dominated by adult stages. We suggest that the winter epizootic observed in 2014 and not in 2013 may be a result of the combined effect of production of salmon lice in nearby fish farms and the prevailing environmental conditions.KW VollsetBT BarlaupInter-ResearcharticleAquaculture. Fisheries. AnglingSH1-691EcologyQH540-549.5ENAquaculture Environment Interactions, Vol 5, Iss 3, Pp 249-253 (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 KW Vollset BT Barlaup First report of winter epizootic of salmon lice on sea trout in Norway
description	Here we report on the first observation of a winter epizootic of salmon lice Lepeophtheirus salmonis Krøyer on sea trout Salmo trutta Linnaeus in a Norwegian fjord with intensive salmon farming. Trouts were sampled and counts of lice in the field were made for 2 consecutive winter seasons with trap nets in 2013 and 2014 just inside and outside the border to the National Salmon Fjord in Sognefjorden, western Norway. The aim of the study was to document potential epizootic outbreaks during the winter months. Following reports and field registrations of high abundance of lice in February and early March 2014, 12 and 14 fish were sampled from the 2 locations between 9 and 24 March and analyzed in the laboratory. Prevalence of sea lice on sampled fish inside and outside the fjord was 100 and 74%, with a mean abundance of 254.3 and 26.8 and a mean average intensity of 254.3 (max = 759) and 37.5 (max = 188), respectively. Chalimus stages dominated on the fish. In comparison, prevalence and abundance based on field observations in 2013 were low and dominated by adult stages. We suggest that the winter epizootic observed in 2014 and not in 2013 may be a result of the combined effect of production of salmon lice in nearby fish farms and the prevailing environmental conditions.
format	article
author	KW Vollset BT Barlaup
author_facet	KW Vollset BT Barlaup
author_sort	KW Vollset
title	First report of winter epizootic of salmon lice on sea trout in Norway
title_short	First report of winter epizootic of salmon lice on sea trout in Norway
title_full	First report of winter epizootic of salmon lice on sea trout in Norway
title_fullStr	First report of winter epizootic of salmon lice on sea trout in Norway
title_full_unstemmed	First report of winter epizootic of salmon lice on sea trout in Norway
title_sort	first report of winter epizootic of salmon lice on sea trout in norway
publisher	Inter-Research
publishDate	2014
url	https://doaj.org/article/60e75a0727674064a7d788fe090cb6c5
work_keys_str_mv	AT kwvollset firstreportofwinterepizooticofsalmonliceonseatroutinnorway AT btbarlaup firstreportofwinterepizooticofsalmonliceonseatroutinnorway
_version_	1718425613872660480

First report of winter epizootic of salmon lice on sea trout in Norway

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