NDLI: Movements and dispersal of farmed Atlantic salmon following a simulated-escape event

Content Provider	Springer Nature Link
Author	Solem, Øyvind Hedger, Richard D. Urke, Henning A. Kristensen, Torstein Økland, Finn Ulvan, Eva M. Uglem, Ingebrigt
Copyright Year	2012
Abstract	One of the major challenges for understanding the ecological impact of escaped farmed Atlantic salmon (Salmo salar L.) is predicting their dispersal patterns after an escape event. Here, we quantify the behaviour of escaped farmed salmon using a simulated-escape experiment within a Norwegian fjord system. Thirty-seven individuals were tagged with acoustic transmitters and their spatial distribution, horizontal movements and diving behaviour was monitored throughout the fjord and accompanying rivers using 29 acoustic receivers. A rapid movement away from the release site occurred. There was no movement into the rivers feeding the fjord and there was no preference for residence at the fish farms: nearly a third of the individuals had a final detection in the outer part of the fjord and no detections occurred from approximately 2 months after release. As it is unlikely that all fish died or remained undetected within the study area it is reasonable to assume that a substantial proportion of the fish moved out of the fjord system. If a recapture program is not implemented immediately after an escape event, we recommend spreading potential recapture efforts over a relatively large area.
Starting Page	927
Ending Page	939
Page Count	13
File Format	PDF
ISSN	03781909
Journal	Environmental Biology of Fishes
Volume Number	96
Issue Number	8
e-ISSN	15735133
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-09-29
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Fish farms Atlantic salmon Escape patterns Acoustic telemetry Freshwater & Marine Ecology Zoology Animal Systematics/Taxonomy/Biogeography Environment Nature Conservation
Content Type	Text
Resource Type	Article
Subject	Aquatic Science Ecology, Evolution, Behavior and Systematics

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