| 31. | This selectivity is achieved by metal grids integrated into the trawl net structure.
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| 32. | They often become entangled in trawls, and dredges.
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| 33. | Some species form a substantial component of the bycatch of commercial trawl fisheries.
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| 34. | Today, trawl fishing is the main industrial method of catching white fish.
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| 35. | Catch limits are based on biomass estimates derived from bottom trawl catch rates.
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| 36. | Their dense swarms have also become problematic for scientific trawls and water intake.
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| 37. | The coastal fishing fleet comprises polyvalent, purse seine and trawl fishing vessels.
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| 38. | The vessel was also to trawl up remnants from World War I disasters.
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| 39. | Early discoveries were limited because of the available tools, mostly nets and trawls.
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| 40. | Trawl gear is not more wasteful than long lines or pots, he says.
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