Respiration rates of Opsanus tau in suspensions of fullerˈs earth (2.20 g/liter) and in resuspended Patuxent River sediment (1.58 g/liter) did not differ significantly from rates of fish in filtered water. Oxygen consumption rates of fish exposed to Patuxent River sediments (3.36 g/liter) after 72 h exposure to 11.09 g/liter of the same material exhibited significantly greater (P < 0.05) variance than control fish. Respiration rates of fish tested in filtered water after 72 h exposure to 10.37 g/liter of Patuxent River sediment were not different from those of control fish. Respiration variances differed between males and females only in Patuxent River sediment suspensions. Fish held in Patuxent River sediment suspensions of 14.6 g/liter for 72 h exhibited no significant changes in erythrocyte count, hemoglobin concentration, micro-hematocrit, or blood osmolal concentration compared with control fish. Toadfish appear to be largely unaffected by highly turbid conditions.
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Neumann et al. (1975) studied this question.