Larval rearing in extensive conditions  <B>Larval rearing in extensive conditions</B><P>P. Divanach</B><I><P> Institute of Marine Biology, Heraklion, Crete, Greece</I><B><P> Mauroudio Kentouri</B><I><P> Department of Biology, University of Crete, Heraklion, Crete, Greece</I><B><P> Introduction</B><P> Compared with freshwater fish culture, marine aquaculture has not been able to make use of straightforward or extensive methods for producing larvae and juveniles. The methods used have been of an industrial nature with a well developed infrastructure and a qualified work force using sophisticated technology which pushes the management of the animal's environment to the extreme. Three major consequences are:<P> (1)high cost of production<BR> (2)biological instability leading to problems with disease and quality of the fry which may affect their viability or their eventual sale price<BR> (3)inaccessibility of the technology to small producers leading to a dependence on the market for the supply of fry.<B></B><P> AQUACULTURE Volume 2 1989. Editor GILBERT BARNABE<B></B><P>