. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. DURATION OF EGG DIAPAUSE 173 CT50 VALUES VS FIELD TEMP. 30" C T 5 0 20". 10" 0 5 10 15 20 TEMPERATURE ( °C) FIGURE 2. Linear regression analysis of CT50 value of each field sample and the surface water temper- ature at the time of collection. only 150 to 200 days whereas a high hatch was maintained by the eggs of 339a for almost 300 days. Although the hatch of both sets dropped off to near 0% levels after 300 days, many of the eggs in both sets still appeared viable. DISCUSSION This study shows that the median
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. DURATION OF EGG DIAPAUSE 173 CT50 VALUES VS FIELD TEMP. 30" C T 5 0 20". 10" 0 5 10 15 20 TEMPERATURE ( °C) FIGURE 2. Linear regression analysis of CT50 value of each field sample and the surface water temper- ature at the time of collection. only 150 to 200 days whereas a high hatch was maintained by the eggs of 339a for almost 300 days. Although the hatch of both sets dropped off to near 0% levels after 300 days, many of the eggs in both sets still appeared viable. DISCUSSION This study shows that the median effective number of days of chilling at 5°C de- creased as the fall season progressed for the diapause eggs of field-collected females. TABLE II Culture # (generation, subitaneous-s or diapause-d line), rearing conditions (photoperiod and temperature), CT50 values (days), and regression parameters pertaining to diapause eggs of laboratory-reared females Culture # Conditions CT 50 * Eggs collected from same culture, but on two different days. Slope 370 (23s) 14°C, 8L-16D .85 371 (23s) 14°C, 8L-16D .71 374 ( 6s) 14°C, 8L-16D .90 375 ( 3s) 19°C, 12L-12D .91 372 (23s) 19°C. 12L-12D .78 373 (23s) 19°C, 12L-12D .74 376 ( 7d) 19°C, 12L-12D .78 323 ( 7s) 19°C 12L-12D .83 329 (15s) 19°C, 12L-12D .87 325 ( 4d) 19°C 12L-12D .78 339a( 5d)* 19°C, 12L-12D .93 339b( 5d)* 19°C, 12L-12D .94 330 (15s) 19°C, 8L-16D .84 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
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
