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FRV Clupea 1903C

Cruise summary report

Cruise Info. 
Ship name (ship code)FRV Clupea (74CU)
Cruise identifier1903C
Cruise period2003-11-17 — 2003-12-01
StatusCompleted
Port of departureFraserburgh, United Kingdom
Port of returnFraserburgh, United Kingdom
PurposeResearch
Objectives1. To carry out detailed acoustic surveys in selected lochs, the Sound of Sleat and North Minch (if time allows) using the EK 500 and RoxAnn to determine the distribution of herring and sprat. Concentrations of pelagic fish will be sampled using the PT154. Species composition and length-frequency distributions of the fish caught will be determined. Sub-samples will be weighed and otolithed to establish length-weight relationships. Herring samples will be analysed for sex, maturity and Ichthyophonus infection. Stomach, gonad and DNA samples will also be taken.
2. A line of CTDs will be done through each loch.
Chief scientistEmma Hatfield (Fisheries Research Services Aberdeen Marine Laboratory)
Cruise reportFRV Clupea 1903C cruise report 1903c.pdf (0.13 MB) 
Ocean/sea areas 
GeneralInner Seas off the West Coast of Scotland
SpecificLoch Kishorn, Loch Alsh, Loch Duich, Loch Hourn, Loch Nevis, Sound of Sleat, North Minch
Measurements 
Physical oceanography 
CTD stationsQuantity: number of profiles = 20
Description: CTD stations
Biology and fisheries 
Pelagic fishQuantity: number of hauls = 15
Description: Pelagic trawls using PT154
Acoustic reflection on marine organisms.Quantity: number of surveys = 7
Description: EK 500 and RoxAnn surveys to determine the distribution of herring and sprat
Moorings, landers, buoys 
Physical oceanography 
Sea level (inc. bot. press., inverted echosounder)57° 7' 29" N  5° 40' 32" W — Water level recorder. Loch Hourn 20/11/03,09:30 - 21/11/03,10:44
Sea level (inc. bot. press., inverted echosounder)57° 20' 28" N  5° 41' 46" W — Water level recorder. Loch Kishorn 22/11/03,08:49 - 22/11/03,15:50
Sea level (inc. bot. press., inverted echosounder)57° 16' 6" N  5° 33' 17" W — Water level recorder. Upper Loch Alsh 23/11/03,08:22 - 24/11/03, 17:30
Sea level (inc. bot. press., inverted echosounder)57° 7' 58" N  5° 38' 14" W — Water level recorder. Loch Hourn 28/11/03,08:55 - 28/11/03,16:45
Sea level (inc. bot. press., inverted echosounder)57° 1' 58" N  5° 43' 6" W — Water level recorder. Loch Nevis 26/11/03,08:24 - 27/11/03,16:46