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Direct calorimetry on free swimming goldfish at different oxygen levels

1988; Volume: 33; Issue: 4 Linguagem: Inglês

10.1007/bf01912725

0368-4466

J. van Waversveld, Albert D.F. Addink, Guido van den Thillart, H. Smit,

Aquaculture Nutrition and Growth

Heat production and oxygen consumption of groups of fasting, dark acclimated free swimming goldfish were measured at 20‡C during normoxia and anoxia. For this purpose a special 1 liter flow through microcalorimeter was constructed. It appeared that the normoxic values could be established at any time 2 days after introduction of the fish into the calorimeter, 700 j/h/MW and 1.6 mmoles/h/MW respectively. The normoxic oxycalorific value of 20 kJ/l O2 indicates the use of a mixed substrate for oxidation. During anoxia, heat production was reduced to 30% of the normoxic level; 200 J/h/MW.