31. Purse seining is one of the most efficient methods of fishing available, with one of the lowest levels of bycatch.32. Straying is more difficult to eliminate without closing or sharply curtailing hatchery production, noted Zuanich, of the Purse Seine Vessel Owners. 33. The Puretic power block line was introduced in the 1950s and was the key factor in the mechanization of purse seining . 34. There are two main types of seine net deployed from seiners : " purse seines " and " Danish seines ". 35. The Japanese horse mackerel is important as a commercial fish in Japan, where it is caught using trawls, purse seines , longlines. 36. The size and attributes of purse seines are regulated by the Alaska Department of Fish and Game, which oversees the industry. 37. Purse seine fishing is also part of the local fleet and has, on the mainland, only one target species : the sardine.38. It is used for the manufacture of floats for commercial fishing gear such as purse seine ( seine fishing ) and gillnets. 39. The combination of these blocks with advances in fluid hydraulics and the new large synthetic nets changed the character of purse seine fishing. 40. This compares poorly with the rate of one dolphin per 70 tonnes of tuna landed in the eastern Pacific purse seine tuna fishery.
