. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 132 JOHN BUCK In agreement with this idea, the phase of apparently decreased uptake invariably precedes the peak of apparently increased O2 uptake in instances where both sup- posed artifacts occur together. Punt (1956) and Punt, Parser and Kuchlein (1957) have recently reported that small spikes, synchronous with CO2 bursts and sometimes diphasic, are a reg- ular feature of O2 uptake in several species of insects, particularly carabid beetles, in both manometric and diaferometric For the spikes in their Warburg re
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 132 JOHN BUCK In agreement with this idea, the phase of apparently decreased uptake invariably precedes the peak of apparently increased O2 uptake in instances where both sup- posed artifacts occur together. Punt (1956) and Punt, Parser and Kuchlein (1957) have recently reported that small spikes, synchronous with CO2 bursts and sometimes diphasic, are a reg- ular feature of O2 uptake in several species of insects, particularly carabid beetles, in both manometric and diaferometric For the spikes in their Warburg records the Dutch workers have given the same explanation as we—that they are artifacts of equilibration—but for the diaferometer records, in which a peak of apparently depressed O2 uptake follows the peak of increased uptake (Fig. 3D), they propose the quite different explanation discussed below. Punt and I agree that a rapid fall in tracheal pO2, during which the tracheal gas is depleted of O2 down to tissue level, should follow spiracular constriction (Fig. 3C) and that a rapid entry of O2 should occur when the spiracles dilate at burst time and the tracheal pO2 rises again to or near atmospheric level (Fig. 3D).3 10. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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