RV Cirolana CIR3/92
Cruise summary report
|Ship name (ship code)||RV Cirolana (74CZ)|
|Cruise period||1992-02-19 — 1992-03-10|
|Port of departure||Lowestoft, United Kingdom|
|Port of return||Lowestoft, United Kingdom|
|Objectives||1. Trawling on rough and smooth grounds will be undertaken to investigate the extent to which the substratum influences the amount of fish prey consumed.
2. Twenty-four hour trawling using a Portuguese high-headline trawl to investigate diurnal periodicity in the consumption of fish prey by cod and whiting and other predatory species. The objective is to establish an estimate of gastric evacuation rate in situ.
3. Trawling with and without liner/top cover will be undertaken to investigate the incidence of fish predators feeding in the trawl.
4. Sampling of the stomach contents of the cod, whiting and other predators along with the preliminary identification and staging of prey will be undertaken and material for analysis in the laboratory will be preseved frozen. The species composition and size distribution of the catch wil be determined using standard groundfish survey procedures and the data logged using the SAS micro version of the GFS suite. Temperature and salinity profiles and surface light measurements will be determined at each fishing site.
5. Collection of herring hearts and whole fish to investigate the incidence of infection with the fungal disease Ichthyophonus (D Bucke).
6. Collection of fish for the ID Course (A Watson) and for J Horwood.
7. Collection of whiting to investigate the incidence of gill fluke (B Williams, National Museum of Wales).
8. Collection of plaice for the National monitoring programme (A Franklin).
9. Collection of fish and other organisms as food for laboratory feeding experiments.
|Chief scientist||Peter J Bromley (Ministry of Agriculture, Fisheries and Food Lowestoft Fisheries Laboratory)|
|Cruise report||(0.14 MB)|
|CTD stations||Quantity: number of stations = 11|
|Biology and fisheries|
|Demersal fish||Quantity: number of hauls = 71|