Abstract
Measurements have been made of oxygen consumption rates \(\dot v\)O2 of 10 specimens of the mesopelagic deep-sea fangtooth fish Anoplogaster cornuta. Determinations were made at 1 atm pressure, at temperatures of 3°, 7°, and 10°C, at dissolved oxygen concentrations ranging from near saturation to zero, with the fish swimming at low, controlled speeds. Weight-specific \(\dot v\)O2 were uniformly low. They showed Q10's of 2.5 and 1.3, respectively, in the temperature ranges 3° to 7°C, and 7° to 10°C, at dissolved oxygen concentrations above 2 ml (standard temperature and presusure, STP)/1. Measurable \(\dot v\)O2 continued in these fish at dissolved oxygen concentrations down to the lowest levels detectable with our instruments. At 7°C the average critical oxygen tension (P c ) for the entire group was near 35 mm Hg. However, there is a statistically significant positive slope to the regression line relating \(\dot v\)O2 to P c for individual fish. The physiological and ecological significance of these results is discussed, particularly with reference to thermal effects and to the basis for survival by A. cornuta in the oxygen minimum layers of the eastern Pacific Ocean.
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Communicated by J.S. Pearse, Santa Cruz
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Gordon, M.S., Belman, B.W. & Chow, P.H. Comparative studies on the metabolism of shallow-water and deep-sea marine fishes. IV. Patterns of aerobic metabolism in the mesopelagic deep-sea fangtooth fish Anoplogaster cornuta . Marine Biology 35, 287–293 (1976). https://doi.org/10.1007/BF00396876
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DOI: https://doi.org/10.1007/BF00396876