p. 251 - 259 OBSERVATIONS CAONCERNANT L'HIBERNATION DE LA TRUITE ARC-EN-CIEL (SALMO GAIRDNERI IRIDEUS GIBBONS, 1855) EN CONDITIONS D'EXPERIMENTATION AU LITTORAL ROUMAIN DE LA MER NOIRE Reveica Ionita 1), Elena Ghitescu 1) et Eugenia Danila 2) 1)Institute Roumain de Recherches Marines Constanta 2)Hopital Municipal Constanta Abstract The paper presents the resultats of the experiments on the rainbow trout (Salmo irideus GIBBONS 1855) wintering in marine and fresh water. The variation of the main physico-chemical agents of the water, the evolution of the basic somatic characteristics and the biochemical and blood content of the trout maintained in both media are pointed out as well.