Abstract
1. 1. A partial restoration of function was achieved when isolated hearts from deep sea fishes were appropriately pressurized and perfused: Mora moro (900m depth), Coryphaenoides armatus (4000m), Histiobranchus bathybius (4000 m). 2. 2. Increasing hydrostatic pressure over the 1–400 atm. range mainly slowed the heart rate in both the deep sea fish and in the shallow water species Anguilla anguilla and Gadus morhua. 3. 3. The pressure sensitivity of the hearts is markedly affected by Ca 2+ and adrenaline. 4. 4. The results demonstrate that freshly trawled deep sea fish hearts are available for experimental investigation, following pressure-resuscitation.
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