Alterations of growth performance, hematological parameters, and plasma constituents in the sablefish, Anoplopoma fimbria depending on ammonia concentrations

Abstract

Juvenile Anoplopoma fimbria (mean length 16.8±2.2cm, and mean weight 72.8±5.4g) were exposed for 2months with different levels of ammonia (0, 0.25, 0.50, 0.75, 1.00, and 1.25mg/L). Growth performances such as daily length gain, daily weight gain, condition factor, and hepatosomatic index were significantly decreased by ammonia exposure. Hematological parameters such as red blood cell (RBC) count, hematocrit, and hemoglobin were also significantly decreased. In plasma inorganic components, calcium and magnesium were significantly decreased by ammonia exposure. In plasma organic components, there was no alteration in cholesterol and total protein. In enzyme plasma components, glutamic oxalate transaminase (GOT) and glutamic pyruvate transaminase (GPT) were significantly increased. The results of this study indicated that ammonia exposure can induce significant growth reduction and blood biochemistry alterations of A. fimbria.