RV Corystes COR12B/90
Cruise summary report
|Ship name (ship code)||RV Corystes (74RY)|
|Cruise period||1990-11-13 — 1990-11-30|
|Port of departure||Lowestoft, United Kingdom|
|Port of return||Lowestoft, United Kingdom|
|Objectives||1. To investigate predation rates and prey selection in cod and whiting (and haddock where appropriate). This involves the following procedures:
(a) Survey the abundance of cod and whiting and their prey using a Portuguese High-headline trawl (including 24h sampling periods to investigate diurnal patterns), coupled with an analysis of the species composition and size distribution of the catch.
(b) Sampling the stomach contents of cod and whiting, identification and staging of prey, and preservation of material for analysis in the laboratory.
(c) Survey of the abundance of the macrobenthos prey organisms using a 3-metre beam trawl.
(d) Temperature profiles and surface light measurements.
2. Trawling with and without liner/top cover to investigate the incidence of feeding in the trawl. Not attempted due to lack of fish.
3.(a) Collection of live gurnards (N Ashcroft, Bristol).
(b) Collection of live benthos and brittle stars, and cod worms frozen in liquid nitrogen (B Turner).
(c) Collection of frozen fish for pollution studies (A Franklin) and fish food (P J Bromley), along with any bass (D Eaton).
4. Develop and test the Scanmar and plankton logging programs for use on micros at sea (K Brander)
|Chief scientist||Peter J Bromley (Ministry of Agriculture, Fisheries and Food Lowestoft Fisheries Laboratory)|
|Cruise report||(0.12 MB)|
|CTD stations||Quantity: number of stations = 4|
|Biology and fisheries|
|Phytobenthos||Quantity: number of stations = 8|
|Zoobenthos||Quantity: number of stations = 8|
|Pelagic fish||Quantity: number of hauls = 49|