. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. TEMPERATURE AND GONADS OF OYSTERS 93 estimated number of females in the sample and x is the log of the compensated time. The latter is the time that would presumably be required for a sample of 50 oysters containing females, which is the weighted average for the experiment, to reach the same degree of maturity as the given sample. This is presented in Figure 13, showing degree of maturity plotted against compensated exposure time, with .6 LOG TIME (x) .8 UJ o 98 90 H CD 080 "".TO H 60 H 50 or
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. TEMPERATURE AND GONADS OF OYSTERS 93 estimated number of females in the sample and x is the log of the compensated time. The latter is the time that would presumably be required for a sample of 50 oysters containing females, which is the weighted average for the experiment, to reach the same degree of maturity as the given sample. This is presented in Figure 13, showing degree of maturity plotted against compensated exposure time, with .6 LOG TIME (x) .8 UJ o 98 90 H CD 080 "".TO H 60 H 50 or 40 K 30 2 20 UJ UJ cr o UJ o 10. 0— 15° O —20s x —25° • — 30' I I L A I i 345 10 15 20 30 40 50 DAYS EXPOSURE, LOG SCALE FIGURE 13. Degree of maturity (%) in samples of 50 oysters plotted against period of exposure to four experimental temperatures. Each period of exposure is compensated for the estimated sex ratio of the sample. a straight line of slope fitted for each of the four temperatures. This fit is satisfactory after compensation for sex ratio: chi-square equals , with 22 degrees of freedom, which is just at the 10 per cent level of significance. From the equation for each line, y — y — {x — x), where y is the probit of degree of maturity and x and y are the average values of x and y for a given temperature, the average time required for 50 per cent of oysters to develop mature. 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
