Oxygen Consumption and Swimming Performance in Hypoxia-Acclimated Rainbow Trout Salmo Gairdneri
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Oxygen Consumption and Swimming Performance in Hypoxia-Acclimated Rainbow Trout Salmo Gairdneri. / BUSHNELL, PG; STEFFENSEN, JF; JOHANSEN, K.
In: Journal of Experimental Biology, Vol. 113, 1984, p. 225-235.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Oxygen Consumption and Swimming Performance in Hypoxia-Acclimated Rainbow Trout Salmo Gairdneri
AU - BUSHNELL, PG
AU - STEFFENSEN, JF
AU - JOHANSEN, K
N1 - Key words: Hypoxia acclimation, oxygen uptake, rainbow trout
PY - 1984
Y1 - 1984
N2 - 1. Swimming performance and oxygen consumption of normoxic (control) and hypoxia-acclimated (P002=40 mmHg) rainbow trout, Salmo gairdneri Richardson, were monitored at >145, 60 and 40mmHg.2. Maximum swimming velocity at 40mmHg was reduced from >54.8cm s-1 to 41.4cm s1 in controls and to 40.6 cm s-1 in hypoxiaacclimated fish.3. Normoxic oxygen consumption of control fish ranged from 97.5 mg O2 kg-1 h-1(5.5cm s-1) to 318.5 mg O2 kg-1 h-1 (54.8 cm s-1) and did not differ significantly from that of hypoxia-acclimated fish in normoxia.4. Reduction of ambient P002 from normoxia to 60mmHg or 40mmHg did not significantly change oxygen consumption in control animals, although no fish (control or hypoxia acclimated) completed swimming trials at 54.8cm s-1 in 40mmHg.5. Oxygen consumption of hypoxia-acclimated fish at 5.5cm s-1 and 40 mmHg was significantly higher than oxygen uptake in normoxia at the same speed. This relative increase was not maintained, however, as oxygen consumption at higher swimming speeds was similar to that in normoxia.6. Blood studies showed that hypoxia-acclimated fish had lower ATP concentrations and P50 values. While these factors may increase the blood oxygen loading capacity, the change is apparently not enough markedly to improve swimming performance or oxygen consumption in hypoxia and/or exercise.
AB - 1. Swimming performance and oxygen consumption of normoxic (control) and hypoxia-acclimated (P002=40 mmHg) rainbow trout, Salmo gairdneri Richardson, were monitored at >145, 60 and 40mmHg.2. Maximum swimming velocity at 40mmHg was reduced from >54.8cm s-1 to 41.4cm s1 in controls and to 40.6 cm s-1 in hypoxiaacclimated fish.3. Normoxic oxygen consumption of control fish ranged from 97.5 mg O2 kg-1 h-1(5.5cm s-1) to 318.5 mg O2 kg-1 h-1 (54.8 cm s-1) and did not differ significantly from that of hypoxia-acclimated fish in normoxia.4. Reduction of ambient P002 from normoxia to 60mmHg or 40mmHg did not significantly change oxygen consumption in control animals, although no fish (control or hypoxia acclimated) completed swimming trials at 54.8cm s-1 in 40mmHg.5. Oxygen consumption of hypoxia-acclimated fish at 5.5cm s-1 and 40 mmHg was significantly higher than oxygen uptake in normoxia at the same speed. This relative increase was not maintained, however, as oxygen consumption at higher swimming speeds was similar to that in normoxia.6. Blood studies showed that hypoxia-acclimated fish had lower ATP concentrations and P50 values. While these factors may increase the blood oxygen loading capacity, the change is apparently not enough markedly to improve swimming performance or oxygen consumption in hypoxia and/or exercise.
M3 - Journal article
VL - 113
SP - 225
EP - 235
JO - Journal of Experimental Biology
JF - Journal of Experimental Biology
SN - 0022-0949
ER -
ID: 21951486