RV Lough Foyle LFapr94

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Lough Foyle (74LG)
Cruise identifierLFapr94
Cruise period1994-04-12 — 1994-04-15
Port of departureBelfast, United Kingdom
Port of returnBelfast, United Kingdom
Objectives1) To investigate the oceanography of the coastal and central stratified region of the NW Irish Sea.
2) To undertake primary production experiments (simulated in situ) including an assessment of the relative contribution of different size fractions of the phytoplankton to total production.
3) To assess the distribution of different size classes of zooplankton.
4) To determine the distribution and biomass of dominant copepod species (DANI, MSc student.
5) To collect sediment core samples from stations 38 and 47 for C/N and pigment analysis and sediment grab samples from station 38 for identification and enumeration of benthic infauna.
Chief scientistRichard Gowen (Department of Agriculture for Northern Ireland)
Cruise reportRV Lough Foyle LFapr94 cruise report lf_apr94.pdf (0.11 MB) 
Ocean/sea areas 
GeneralIrish Sea and St. George's Channel
SpecificNW Irish Sea
Physical oceanography 
Water bottle stationsQuantity: number of stations = 20
Description: Water samples taken for nutrients, C/N, size fractionation of chlorophyll, production, and phytoplankton species composition, primary production, and suspended solids
CTD stationsQuantity: number of stations = 20
Description: CTD profiles taken
Transparency (eg transmissometer)Quantity: number of stations = 20
Description: Secchi disc used
Optics (eg underwater light levels)Quantity: number of stations = 19
Description: Light measurements
Biology and fisheries 
ZooplanktonQuantity: number of stations = 20
Description: 2 Bongo net hauls were made at each station. Size fractionation using a pump was carried out at 11 stations
Geology and geophysics 
GrabQuantity: number of stations = 1
Description: Grab samples collected from station 38 for macrofauna
Core - soft bottomQuantity: number of stations = 2
Description: Sediment cores collected from stations 38 and 47 for chlorophyll and C/N analysis