FRV Clupea 0295C
Cruise summary report
|Ship name (ship code)||FRV Clupea (74CU)|
|Cruise period||1995-01-30 — 1995-02-11|
|Port of departure||Fraserburgh, United Kingdom|
|Port of return||Fraserburgh, United Kingdom|
|Objectives||1. To measure light distribution in and around the trawl for modelling the visual stimulus (Mr Kim).
2. To observe the behaviour of fish in experimental extensions in order to quantify escape behaviour and encounter rate. Insufficient TV observations were made.
3. To observe the behaviour of fish in the same extenstion arrangements in dark conditions using the TUV fitted with the Simrad scanning sonar and a new low light level flash TV system.
4. To assess small fish escape routes at night using small mesh pocket covers.
5. To assess the potential of flow guidance devices in aiding the passage of fish attemping to swim through meshes. Not attempted due to lack of time. Not attempted due to lack of time.
|Chief scientist||Clem S Wardle (Scottish Office Agriculture Environment and Fisheries Department Aberdeen Marine Laboratory)|
|Cruise report||(0.06 MB)|
|Specific||Moray Firth or Orkney Islands|
|Optics (eg underwater light levels)||Description: Measuring light distribution in and around the trawl.|
|Biology and fisheries|
|Other biological/fisheries measurement||Quantity: number of hauls = 28|
Description: to advance knowledge of the difference between night and day escape distributions and the different reaction behaviours.