1. To compare water flow measurements within a standard cod-end cover and modified cod-end, using self-recording flow meters.
2. To measure the selectivity of a 120 mm and 130 mm diamond mesh cod-end, using the hooped cod-end cover method.
3. To determine the effect of twine resistance on the selectivity of a 120 mm diamond mesh cod-end.
Robert J Kynoch (Fisheries Research Services Aberdeen Marine Laboratory)
Biology and fisheries
Description: Selectivity trials took place 16 miles east of Aberdeen.
No. of trials not noted.
Description: In Moray Firth flow meter trials took place, to measure relative water speeds.
No. of trails not noted.