. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 90 W. W. ALPATOV of functional relation between the time of larval feeding and the final size of the flies. First of all I reinvestigated the data published by Herms (1928) and found that when plotted on a diagram they reveal a very interesting picture. I t Fema/es y= + * +** Mates y= + ;(2+* «8 5V 60 66 72 78 8V 3O /yours FIG. 3. The relation between the wing length and the length of the feeding period in Lucilia scricata. Data from Herms (1928). Fig. 3 represents Herm
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 90 W. W. ALPATOV of functional relation between the time of larval feeding and the final size of the flies. First of all I reinvestigated the data published by Herms (1928) and found that when plotted on a diagram they reveal a very interesting picture. I t Fema/es y= + * +** Mates y= + ;(2+* «8 5V 60 66 72 78 8V 3O /yours FIG. 3. The relation between the wing length and the length of the feeding period in Lucilia scricata. Data from Herms (1928). Fig. 3 represents Herms' data and two cubic parabolas which I fitted to the observed points. Up to the 78 hour point the trend of the curves represents the upper part of a typical growth curve. There cannot be any doubt that this trend corresponds exactly to the upper branch of the logistic curve which can be fitted to the growth of Drosophila larvse of the third instar (see Alpatov, 1929). But the decline after 78 hours is quite remarkable. Going back to my paper on larval growtn in Drosophila I was able to find in Fig. 13 particularly a slight indication as to an analogous decline of the size of the larvse killed at the latter end of the life of the culture. It was therefore decided to clear up this question on specially collected material. This was done in April 1929. Forty bottles containing grams of Magic yeast with 25 drops distilled water were populated by 80 larvse each. Five drops of water were added every day during the larval growth. The experiment was run at a temperature of 25° C. Table II contains data on the sex relations in the material studied. Let us first compare the percentage of males emerged from larvse taken from the food at 48-80 hours, which is equal to , with that of. 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 rese
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
