. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 10 12 14 Days 20 Figure 2. Daily mortality (as percentage of .ample) of the zebra mussel (Dreisscna polymorphd) when exposed to Po^ levels of , , , and ton-over a experimental period, or until 100';? sample mortality occurred. that Po2 significantly influenced the rate of byssogenesis over the first 7 days of exposure (Table I). An LSD test indicated that the mean rate of byssogenesis was signifi- cantly greater (P < ) for mussels exposed to high Po2 (, , and torr) than for
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 10 12 14 Days 20 Figure 2. Daily mortality (as percentage of .ample) of the zebra mussel (Dreisscna polymorphd) when exposed to Po^ levels of , , , and ton-over a experimental period, or until 100';? sample mortality occurred. that Po2 significantly influenced the rate of byssogenesis over the first 7 days of exposure (Table I). An LSD test indicated that the mean rate of byssogenesis was signifi- cantly greater (P < ) for mussels exposed to high Po2 (, , and torr) than for those exposed to low Po2 ( and torr), over the first 7 days of exposure (Fig. Ib). The null hypothesis that oxygen concentration had no effect on the rate of byssal thread production was therefore rejected. As a result of differing production rates, specimens held at , , and torr had significantly more new byssal threads in their byssal mass after 7 days exposure than those held at or torr (Fig. Ib). Mean byssal thread number is reported after the first 7 days only, because high mortality in samples 100. 6 8 10 12 14 16 18 20 Days Figure 3. Percentage of the zebra mussel (Dreisscna polymorpha) sample dropping from the byssal holdfast and relocating on the plastic plate, prior to death or the end of the 21-day experimental period (whichever came first), when exposed to Po? levels of , , , , and torr. E z TJ «J 0) TO w 55 >, CD 0) V 100 80 60 40 20. 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 Biolo
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
