Estimating the temporal overlap between post-smolt migration of Atlantic salmon and salmon lice infestation pressure from fish farms

To be able to design effective management to alleviate wild fish from parasite infestation pressure from fish farms, it is pivotal to understand when post-smolts migrate past areas of potential exposure to salmon lice Lepeophtheirus salmonis. Here, data from release groups of coded-wire-tagged Atlan...

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Autores principales:	KW Vollset, BT Barlaup, S Mahlum, PA Bjørn, OT Skilbrei
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/7f8ad255168645109126c769faac9215
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spelling	oai:doaj.org-article:7f8ad255168645109126c769faac92152021-11-11T11:05:50ZEstimating the temporal overlap between post-smolt migration of Atlantic salmon and salmon lice infestation pressure from fish farms1869-215X1869-753410.3354/aei00195https://doaj.org/article/7f8ad255168645109126c769faac92152016-09-01T00:00:00Zhttps://www.int-res.com/abstracts/aei/v8/p511-525/https://doaj.org/toc/1869-215Xhttps://doaj.org/toc/1869-7534To be able to design effective management to alleviate wild fish from parasite infestation pressure from fish farms, it is pivotal to understand when post-smolts migrate past areas of potential exposure to salmon lice Lepeophtheirus salmonis. Here, data from release groups of coded-wire-tagged Atlantic salmon Salmo salar smolts and their subsequent recaptures in a trap net in the outer fjord 12 to 97 km from the various release sites were used to estimate the smolts’ progression rate and their arrival time in an outer fjord in Norway. The arrival time estimates to the outer fjord are compared with modelled infestation pressure from local fish farms. The overall progression rate varied from 0.8 to 31.2 km d-1 (0.05 to 2.20 body lengths s-1), with mean and median values of 8.8 and 7.8 km d-1, respectively (0.60 and 0.54 body lengths s-1). The progression rate varied with water discharge from the rivers into the fjords, fish length, condition factor and smolt origin. Simulated arrival time and capture of wild smolts suggest that smolts from the different rivers arrive in the outer fjord system with a difference of up to 4 wk. The arrival time for the rivers with the longest migration was estimated to be from mid-May throughout June. Infestation pressure from fish farms increased from the beginning of June in 2 of 3 study years, suggesting that an increase in lice exposure from fish farms will overlap with smolts from late-migrating populations in some but not all years.KW VollsetBT BarlaupS MahlumPA BjørnOT SkilbreiInter-ResearcharticleAquaculture. Fisheries. AnglingSH1-691EcologyQH540-549.5ENAquaculture Environment Interactions, Vol 8, Pp 511-525 (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 KW Vollset BT Barlaup S Mahlum PA Bjørn OT Skilbrei Estimating the temporal overlap between post-smolt migration of Atlantic salmon and salmon lice infestation pressure from fish farms
description	To be able to design effective management to alleviate wild fish from parasite infestation pressure from fish farms, it is pivotal to understand when post-smolts migrate past areas of potential exposure to salmon lice Lepeophtheirus salmonis. Here, data from release groups of coded-wire-tagged Atlantic salmon Salmo salar smolts and their subsequent recaptures in a trap net in the outer fjord 12 to 97 km from the various release sites were used to estimate the smolts’ progression rate and their arrival time in an outer fjord in Norway. The arrival time estimates to the outer fjord are compared with modelled infestation pressure from local fish farms. The overall progression rate varied from 0.8 to 31.2 km d-1 (0.05 to 2.20 body lengths s-1), with mean and median values of 8.8 and 7.8 km d-1, respectively (0.60 and 0.54 body lengths s-1). The progression rate varied with water discharge from the rivers into the fjords, fish length, condition factor and smolt origin. Simulated arrival time and capture of wild smolts suggest that smolts from the different rivers arrive in the outer fjord system with a difference of up to 4 wk. The arrival time for the rivers with the longest migration was estimated to be from mid-May throughout June. Infestation pressure from fish farms increased from the beginning of June in 2 of 3 study years, suggesting that an increase in lice exposure from fish farms will overlap with smolts from late-migrating populations in some but not all years.
format	article
author	KW Vollset BT Barlaup S Mahlum PA Bjørn OT Skilbrei
author_facet	KW Vollset BT Barlaup S Mahlum PA Bjørn OT Skilbrei
author_sort	KW Vollset
title	Estimating the temporal overlap between post-smolt migration of Atlantic salmon and salmon lice infestation pressure from fish farms
title_short	Estimating the temporal overlap between post-smolt migration of Atlantic salmon and salmon lice infestation pressure from fish farms
title_full	Estimating the temporal overlap between post-smolt migration of Atlantic salmon and salmon lice infestation pressure from fish farms
title_fullStr	Estimating the temporal overlap between post-smolt migration of Atlantic salmon and salmon lice infestation pressure from fish farms
title_full_unstemmed	Estimating the temporal overlap between post-smolt migration of Atlantic salmon and salmon lice infestation pressure from fish farms
title_sort	estimating the temporal overlap between post-smolt migration of atlantic salmon and salmon lice infestation pressure from fish farms
publisher	Inter-Research
publishDate	2016
url	https://doaj.org/article/7f8ad255168645109126c769faac9215
work_keys_str_mv	AT kwvollset estimatingthetemporaloverlapbetweenpostsmoltmigrationofatlanticsalmonandsalmonliceinfestationpressurefromfishfarms AT btbarlaup estimatingthetemporaloverlapbetweenpostsmoltmigrationofatlanticsalmonandsalmonliceinfestationpressurefromfishfarms AT smahlum estimatingthetemporaloverlapbetweenpostsmoltmigrationofatlanticsalmonandsalmonliceinfestationpressurefromfishfarms AT pabjørn estimatingthetemporaloverlapbetweenpostsmoltmigrationofatlanticsalmonandsalmonliceinfestationpressurefromfishfarms AT otskilbrei estimatingthetemporaloverlapbetweenpostsmoltmigrationofatlanticsalmonandsalmonliceinfestationpressurefromfishfarms
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Estimating the temporal overlap between post-smolt migration of Atlantic salmon and salmon lice infestation pressure from fish farms

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