Bibliografía de los peces de agua dulce de la Argentina Suplemento 2003-2004

According to our statement in the previous editions of this list (1996-2002), we provide here an update to the year 2004, including, as always, some references omitted before. This bibliography is edited electronically, considering that this method assured a wider distribution, at least in the opinion sent us by some researchers. The increase, progressive in general, in the number of publications, is evident. It has been analysed by Gómez & Ferriz [2002 (2004)], using mainly the present series of compilations. A reading of this list shows a change, with a noticeable increase in the number of papers on molecular aspects and genetics, and also in conservations subjects. This, in our opinion, show real recent changes in approximations and technologies. We thankfully acknowledge to many authors for sending information about their works.