. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 504 PETER DOUDOROFF temperature gradually, the avoidance reaction was often markedly de- layed and the excursion frequently followed by a temporary or a rela- tively permanent rise or fall, respectively, of the selected temperature. When the same specimens were tested more than once, no marked tend- 24 23 ...-•Transferred to 10° " oC. 20°Cond. Mean 10 Cond. Mean 17' "-•Transferred to 20 0 3 Days of Acclimatization 24 FIG. 5. Rate of change of mean temperatures selected by Girella as a result of acclimatization to 1
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 504 PETER DOUDOROFF temperature gradually, the avoidance reaction was often markedly de- layed and the excursion frequently followed by a temporary or a rela- tively permanent rise or fall, respectively, of the selected temperature. When the same specimens were tested more than once, no marked tend- 24 23 ...-•Transferred to 10° " oC. 20°Cond. Mean 10 Cond. Mean 17' "-•Transferred to 20 0 3 Days of Acclimatization 24 FIG. 5. Rate of change of mean temperatures selected by Girella as a result of acclimatization to 10° and 20°. Fishes originally conditioned for 100 days to 20° (open circles) and to 10° (solid circles). Circles connected by solid lines are mean temperatures selected in successive observations by 16 specimens of each group before and after transfer to the other temperature (as indicated). Days of acclimatization (abscissas) refer to time at new temperatures only. Points marked C are controls and are based upon 13 to 16 specimens which had been kept continuously at the original temperatures of acclimatization. These were obtained at the same time as those for recently transferred specimens on the same abscissa. Broken lines indicate mean temperatures selected by all the specimens which had been kept at 10° and 20° continuously for 100 days or more. ency was observed for the same individuals to select relatively high or low temperatures in successive trials. From these observations it appears that the variability of tempera- tures selected by different individuals with a similar history was not indicative of any permanent physiological differences, resulting in dif- ferences of " ; A specimen could become " adapted " to,. 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 wo
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
