. The Biological bulletin. Biology; Zoology; Marine biology. 64 CHARLES M. LENT The pattern of oxygen tension in mantle cavity fluid was uniform in all mussels tested. When exposed and gaping, the partial pressure of oxygen (pOo) was low —10-18 mm. Hg. Upon inundation, the pOo had an average value of about 105 mm. Hg., fluctuating between 95 and 115 mm. Hg. After inundation, the pO, rises rapidly. Filtering rate appears to be governed by the size of the excurrent siphon aperture, and when open widest, the pOo was highest. When the aperture was constricted, the pOg fell. These fluctuations were
. The Biological bulletin. Biology; Zoology; Marine biology. 64 CHARLES M. LENT The pattern of oxygen tension in mantle cavity fluid was uniform in all mussels tested. When exposed and gaping, the partial pressure of oxygen (pOo) was low —10-18 mm. Hg. Upon inundation, the pOo had an average value of about 105 mm. Hg., fluctuating between 95 and 115 mm. Hg. After inundation, the pO, rises rapidly. Filtering rate appears to be governed by the size of the excurrent siphon aperture, and when open widest, the pOo was highest. When the aperture was constricted, the pOg fell. These fluctuations were not observed when mussels air-gaped. The pOj of external sea water varied between 120 and 145 mm. Hg. 01 100 O -t-> 50 O) Q) ^ -f-* 10 U I- (D h 0. High temperature Low temperature — - Low humidity -High humidity. 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 Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-; Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report; HighWire Press. Lancaster, Pa. [etc. ] : Lancaster Press, inc. [etc. ]
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