ABSTRACT
C onsiderab le in te rest h as b een ev inced in u s in g m icroo rgan ism s o r th e ir d e riv a tiv es in a q u acu ltu re for co n tro lling d iseases, im p ro v in g n u tritio n , a n d e n h an c in g p o n d b o tto m so il a n d w a te r q u a lity (V erschuere e t al., 2000). Som e h av e ap p lied the n am e p rob io tics to these p ro d u c ts (M oriarty , 1999; V erschuere e t al., 2000). H o w ev er, th is n am e is u su a lly rese rv ed for m icroo rgan ism s in en tire ty , o r th e ir co m p o n en ts th a t a re beneficial to the h ea lth of the h o st o rg an ism (Irian to a n d A ustin , 2002). A s m icroo rgan ism s or the ir deriv a tiv es a re u se d to im p ro v e b o tto m soil a n d w a te r quality , an d are n o t p rob io tics acco rd in g to Irian to a n d A u s tin 's defin ition , th e te rm m icrobial p ro d u c ts w ill be u sed h e re to describe live m icroo rgan ism s or th e ir d e riv a tiv e s th a t h av e b eco m e item s of com m erce for u se in aq u acu ltu re po n d s.
