RV Lough Foyle LF/28/95

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Lough Foyle (74LG)
Cruise identifierLF/28/95
Cruise period1995-11-26 — 1995-11-29
Port of departureBelfast, United Kingdom
Port of returnBelfast, United Kingdom
ObjectivesLarval herring survey
1. To survey the distribution and abundance of herring larval from the Manx and Mourne Irish Sea stocks, to produce a larval production estimate (index) and provide data on larval drift.
2. To investigate the abundance of euphausiids and other macro zooplankton in the Irish Sea.
Chief scientistMark Dickey-Collas (Department of Agriculture for Northern Ireland)
Cruise reportRV Lough Foyle LF/28/95 cruise report lf28_95.pdf (0.18 MB) 
Ocean/sea areas 
GeneralIrish Sea and St. George's Channel
SpecificIrish Sea
Physical oceanography 
Subsurface temperature and salinity measurementsQuantity: sample litres = 6000000
Description: Over 6 million litres of seawater were sampled during the cruise. The temperature and salinity of the water column was monitored with the Pronet system
Biology and fisheries 
ZooplanktonQuantity: number of hauls = 24
Description: Hauls 1 to 9 and 26 to 41 were made. At each station the high speed plankton sampler was deployed to 4m off the sea bed. The plankton samples were sorted and all the fish removed and identified
Eggs and larvaeQuantity: number of hauls = 24
Description: Hauls 1 to 9 and 26 to 41 were made. The herring larvae were measured to the nearest 0.1 mm and then fixed in 99% ethanol. The length frequencies of herring larvae at each station were adjusted to give numbers per metre squared, and then used to back calculate a larval abundance index, using a growth and mortality rate.