Abstract:The behaviour, mortality rates and plasma electrolyte concentrations of goldlined seabream Rhabdosargus sarba challenged with low dissolved oxygen (DO) conditions was studied in an experimental setup, comprising a control (7.9 ml/l DO) and two hypoxic (2 ml/l and 1 ml/l DO) treatments. Increased ventilation rates and decreased swimming activity were observed in hypoxic treatments, but some fish exhibited strenuous avoidance actions. No mortalities were observed after 3 h, 6 h, or 24 h, but 50% of males and 18%… Show more
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