Title: GAS EXCHANGE AND ACID-BASE BALANCE IN SWIMMING COHO-SALMON
Abstract: This chapter presents a study on the gas exchange and acid–base balance in swimming coho-salmon. In the study, mass transport of O2, CO2, HCO3−, and H+ were measured of 600 g coho-salmons swimming in seawater for 6 h at four conditions: (A) 80% of the maximal sustained swimming speed (U-crit) at pH 7.95, (B) 80% U-crit, HCO3− < 0.3 mM, pH 7.95, (C) 50% U-crit, pH 7.10, and (D) 50% U-crit after 10–20 min at 120% U-crit, pH 7.95. The experiments were carried out in a tunnel respirometer. Oxygen levels were kept between 100 and 80% air saturation and pH was kept stable within 0.02 pH units. The RQ values for conditions A, B, and D were the same (0.6). In contrast, very low levels were found at low pH conditions indicating retainment of metabolic CO2. In all conditions, it was found that H+ and HCO3− production was imbalanced. Conditions A and D revealed excess H+ production, while B and C showed an excess of HCO3− production.
Publication Year: 1982
Publication Date: 1982-01-01
Language: en
Type: book-chapter
Indexed In: ['crossref']
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