Unity 0307H

Cruise summary report

Cruise Info. 
Ship name (ship code)Unity (74UT)
Cruise identifier0307H
Cruise period2007-05-07 — 2007-05-21
Port of departureFraserburgh, United Kingdom
Port of returnFraserburgh, United Kingdom

1. To carry out mackerel egg survey (ICES Triennial Survey), on the western shelf edge.
2. To collect fish samples from trawling for atresia and maturity assessment.


Unity sailed from Fraserburgh at 1200 on the 7 May and proceeded into the Buchan Deeps in the Moray Firth to test deployment of samplers and trawls and to calibrate the sampler flowmeters. The vessel arrived at the first station (59 45N, 5 15W) at approximately 1200 on the 8 May to commence the survey. Survey stations were then taken at 30'E/W intervals, on transects separated by one degree of latitude. This was continued to the southernmost transect along 55 15N. The survey then continued to transect northwards, mainly occupying transects at 15' in each degree of latitude. i.e. on alternate rows of latitude to those covered during the first half. Sampling was completed at 0700 on the 20 May and the ship headed for Fraserburgh and landed at 1000 on the 21 May.
Chief scientistDavid G Reid (Fisheries Research Services Aberdeen Marine Laboratory)
Coordinating bodyICES
Cruise programmeUnity 0307H cruise programme 0307h.pdf  (0.24 MB) 
Cruise reportUnity 0307H cruise report 0307h.pdf (0.08 MB) 
Ocean/sea areas 
GeneralCeltic Sea
North East Atlantic Ocean (limit 40W)
SpecificWestern Continental Shelf
Track chartsUnity 0307H cruise track — 0307htrk.pdf (0.07 MB) 
Biology and fisheries 
PhytoplanktonQuantity: number of stations = 110
Description: plankton with Gulf VIII
ZooplanktonQuantity: number of stations = 110
Description: plankton with Gulf VIII
Eggs and larvaeQuantity: number of stations = 110
Description: plankton with Gulf VIII, mackerel eggs
Pelagic fishQuantity: number of hauls = 4
Description: trawls for adult mackerel and horse mackerel
Other biological/fisheries measurementDescription: ovary samples, information on length, sex, maturity, age and total, gutted and liver weight collected