RV Cefas Endeavour 6/08
Cruise summary report
|Ship name (ship code)||RV Cefas Endeavour (74E9)|
|Cruise period||2008-03-18 — 2008-03-31|
|Port of departure||Swansea, United Kingdom|
|Port of return||Lowestoft, United Kingdom|
1. To carry out a beam trawl survey of the Western Channel for stock assessment purposes using standardized 4m beam trawls in order to obtain information on:
a) Distribution, size composition and abundance of all fish species caught.
b) Age - length distribution of selected species.
c) Distribution of fish in relation to their environment.
d) Distribution of macrobenthos and anthropogenic debris.
e) Surface and bottom temperature and salinity data using CTD.
f) Length weight & maturity information using individual fish measurements, in support of the EU Data Regulation.
Aim one was completed successfully with all data entered onto the FSS system despite some difficulties with the EDC system. In addition, histology samples were collected to determine accuracy of macroscopic staging along with gonad weight and pictures of the gonads in and out of the body cavity.
2. To collect acoustic data at two operating frequencies (38 kHz and 120 kHz) continuously throughout the cruise. An attempt will be made to use this data to determine habitats and the scale at which these vary.
Data was collected as planned on all acoustic systems and multibeam data was processed in detail on board for all stations sampled. QTC data was also collected and will be processed later along with the fisheries acoustic information.
3. To determine if it is possible to collect qualitative and quantitative information on habitat using an underwater camera system without lights mounted on the gear to ground truth the acoustic information collected on habitats.
The system performed well in terms of down loading and charging on deck, but unfortunately the mounting system still leaves the camera susceptible in bad weather ad the current camera is not light sensitive enough to collect useful pictures with out an additional light source.
|Chief scientist||Sven Richard Kupschus (Centre for Environment, Fisheries and Aquaculture Science Lowestoft Laboratory)|
|Cruise report||(0.45 MB)|
|Specific||Celtic Sea - Western Channel (ICES area VIIE)|
|Track charts||(00 MB)|