Towed and fixed sentinel cage data for Loch Linnhe 2016 -2018 ...
The data comprise lice counts on Atlantic salmon placed in both stationary and moving sentinel cages deployed at and between specified locations. Deployment duration, fish number, cage type, tow number, fish length, fish weight, lice settlement location, lice lifecycle stage and number of lice were...
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| Format: | Article in Journal/Newspaper |
| Language: | English |
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Marine Scotland Science
2023
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| Online Access: | https://dx.doi.org/10.7489/12479-1 https://data.marine.gov.scot/dataset/towed-and-fixed-sentinel-cage-data-loch-linnhe-2016-2018 |
| Summary: | The data comprise lice counts on Atlantic salmon placed in both stationary and moving sentinel cages deployed at and between specified locations. Deployment duration, fish number, cage type, tow number, fish length, fish weight, lice settlement location, lice lifecycle stage and number of lice were all recorded. Sampling was undertaken during September/October of three consecutive years 2016, 2017 and 2018. Data presented here has been used in one peer review publication: Pert CC, Wallace IS, Macdonald P, Ives SC, Murray AG, Rabe B (2023) Infestation rates of lice Lepeophtheirus salmonis and Caligus elongatus on Atlantic salmon in fixed and towed sentinel cages. Diseases of Aquatic Organisms 155:165–174. ... : Towed sentinel cages (TSCs) were deployed from Reinforced Inflatable Boats (RIBs) in Upper Loch Linnhe (ULL) and the Lynn of Lorne (LoL) in Lower Loch Linnhe during these trials. Transects were carried out starting next to a fixed sentinel cage (FSC) deployed for the same duration and were undertaken close to shore although in water depths of at least 5 metres to ensure vessel and staff safety. In ULL transects were carried out between the FSCs while in LoL this was not possible as the likely “finish location” fell within a busy ferry route. The following day transects were carried out in reverse to ensure variability due to tidal conditions was addressed where possible. The sentinel cages were stocked with 30 Atlantic salmon smolts (mean length 225 mm (SE ± 0.86) and weight 123.81 g (SE ± 1.148)) supplied by Mowi Scotland from freshwater sites within the Loch Linnhe management area. At the end of each tow, the smolts were transferred into bins and euthanised using ethyl 3-aminobenzoate methanesulfonate salt ... |
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