Selectivity of hake and horse-mackerel with trawl gears polyethylene and polypropylene in the fishery of Galicia

Abstract

In the present paper, results of selectivity studies on hake and horse-mackerel are summarized. Those studies were carried out all along the Galician Coast specially between Cape Finisterre and the Miño River in depths ranging from 44 to 405 meters. The experience were started in September 1970 and ended in July 1974. [...] In the period from December 1970 to May 1975 a total of 33 trawling have been carried out in the demersal fishery of Galicia. The gear used was a trawl of the type called "baca" with a vocered cod-end, in order to study the selectivity of hake (Merluccius merluccius) and horse-marckerel (Trachurus trachurus) using nets of polyethylene monofilament and polypropylene mutifilament. The selection factors were the following: [...]