. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. HEAVY METALS AND SPERM MOTILITY 241 Mercury The effect of HgCU on the motility of Arbacia punctulata spermatozoa was measured after incubation of the cells with mercuric ion for fixed intervals of time. Figure 3 (solid line) is an example of the changes in motility of sperm cells collected from a single sea urchin after 8 minutes incubation in 5 X 1OS to 10~3 M/ A marked increase in swim speed is observed at mercury concentrations between 10~4 and 10~7 M. In 5 X 10~6 M HgCU Arbacia sperm swim at about 270% of the control rat
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. HEAVY METALS AND SPERM MOTILITY 241 Mercury The effect of HgCU on the motility of Arbacia punctulata spermatozoa was measured after incubation of the cells with mercuric ion for fixed intervals of time. Figure 3 (solid line) is an example of the changes in motility of sperm cells collected from a single sea urchin after 8 minutes incubation in 5 X 1OS to 10~3 M/ A marked increase in swim speed is observed at mercury concentrations between 10~4 and 10~7 M. In 5 X 10~6 M HgCU Arbacia sperm swim at about 270% of the control rate. In higher concentrations of mercury, motility declines but is still 10% above control values in 10~a M HgCl^. As the concentration of mercuric ion is decreased below 10^7 M, acceleration gradually declines and the 240 ^160 o o c 80 o u 0. -2 -3 -4 -5 -6 Log [HgCIJ -7 -8 FIGURE 3. Effect of HgCU on the swimming speed of Arbacia punctulata spermatozoa. The HgCU added to filtered Woods Hole seawater containing 10* + 10% Arbacia punctulata spermatozoa shows pronounced dose-dependent and time-dependent effect. The abscissa is the log molar concentration of mercury in seawater/sperm suspensions: open square—8 minutes incubation ; solid triangles—16 minutes incubation; open circles—24 minutes incubation. The onlinate shows the swim rate of treated sperm expressed as per cent of control rate in seawater, temperature 22-23° 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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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
