Sentence examples for using a twin trawl from inspiring English sources
Three standard codends, with 105, 120 and 140 mm nominal mesh size, and three window codends, with 110, 125 and 135 mm window nominal mesh size, were tested during sea trials conducted in June and July from a commercial trawler using a twin trawl rig and the covered codend technique.
Extrusion was carried out using a twin-screw extruder.
Sampling was carried out using a beam trawl.
Stocks of Pandalus borealis off West Greenland have been assessed using a research trawl survey since 1988.
Adult specimens were sampled using a beam trawl between 2000 and 2010 in three Lake Baikal basins: southern, central, and northern.
Genetics are incorporated using a classical twin design with data from Twins UK, a longitudinal study of UK twins running since 1992.
These turtles were randomly captured in trawl nets without turtle excluder devices at randomly selected stations using a trawl tow time of 30 min. Blood samples were collected and processed in the same manner as described above for use in in vitro exposure experiments.
The samples were collected aboard the RV Shikmona (720 HP; 27 m), using a modified Agassiz trawl (2.3 m width and 0.9 m height), a 14,76 m deep-water trawl (Marinovich-type, codend mesh 6 mm) with a 0.5 mm plankton net secured on top.
Paired simultaneous comparisons (using twin trawls) of each of these four treatment codends with their respective small-meshed controls showed that the conventional diamond-mesh codend with a 200 mesh posterior circumference had no detectable selectivity for all sizes of the school prawns, Metapenaeus macleayi and eastern king prawns, Penaeus plebejus encountered.
Adults were collected using a modified demersal trawl net deployed during daylight hours.
