A consideration important to be made is the condition of the fish while merchandise. According to Marx (1985) ' ' the utility of a thing makes of it value of uso' ' being that ' ' the value of use is only become fullfilled in the use or consumo' '. On the other hand the things also possess an intrinsic property itself it makes that them exchangeable for others and ' ' what it has of common, that the exchange relation of or value of exchange of the merchandise shows in, is, therefore, its valor' ' (MARX, 1985). With this he fishes, it presents another perspective of market which encloses a differentiation in the root of the capitalist relations of production, that is the quarrel of the value of use and value of exchange. Each fishing boat possesss, in its garrison, members of one same one family in its numerical majority, generally with the head of the family in the function of ' ' patro' ' , that is, commander and owner of the boat. Resumidamente, the labor functions in a fishing boat of the studied community are divided in the following way: ) Commander of the boat (' ' patro' '): proprietor of the boat and the nets, and that he knows all the functions in the work fishing boat.
Generally he receives the command from the boat of hereditary form. b) Thrower of net: professional specialized in this function, with good physical conditioning, ability and force. In some cases, the family does not make use of this professional, she contracts and it in the quarter of the Mauazinho or the city of careiro of the Fertile valley. c) Shoal of fish observer (' ' olheiro' '): she is the respected professional more of the boat. Its activity consists of fixing forward post and analyzing the shoal of fish flow in the area of the campaign. .