Cruise summary report
|Cruise period||1993-07-19 — 1993-08-14|
|Port of departure||Gairloch, United Kingdom|
|Objectives||1. To continue the 1992 trials to assess the survival of commercial species of fish escaping from a typical 500/600 hp bottom trawl fitted with 70, 90, 100 and 100mm diamond mesh cod-ends.
2. To measure the selectivity characteristics of each "test" cod-end using hooped covers and to assess the scale damage sustained by escaping fish.
|Chief scientist||G I Sangster (Scottish Office Agriculture and Fisheries Department Aberdeen Marine Laboratory)|
|Cruise report||(0.06 MB)|
|Biology and fisheries|
|Demersal fish||Quantity: number of hauls = 1|
Description: A trawl took palce and all the contents of the net was transferred at depth into the fish transport container.
|Demersal fish||Description: The fish were then monitored using divers to remove the dead fish and to feed those still alive.|
|Demersal fish||Quantity: number of measurements = 1|
Description: The fish were then towed at a constant 20m depth to the cage site.
|Gear research||Quantity: activity duration in days = 1|
Description: A dummy run was conducted of the fish escape collection, to familiarise staff with the new methods.