. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. EFFECTS OF DIET ON MILLIPED LARVAE 459 90 80 - 70 60 SO w 40 v o 30 20 10. I I I I L 1 1 1 L FOO 0 + MOLT J INSTAR J 9 10 10 11 FIGURE 5. Ocelli increase per instar of well-fed and semi-starved larvae. Segments added per instar The effect of diet on segment addition is presented in Figure 4. At molts 4, 5, and 6, the well-fed larvae added more segments than the semi-starved (t test, p < ). At molt 7, however, the semi-starved larvae added more segments than the well-fed ones (p < ) ; the same trend was appare
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. EFFECTS OF DIET ON MILLIPED LARVAE 459 90 80 - 70 60 SO w 40 v o 30 20 10. I I I I L 1 1 1 L FOO 0 + MOLT J INSTAR J 9 10 10 11 FIGURE 5. Ocelli increase per instar of well-fed and semi-starved larvae. Segments added per instar The effect of diet on segment addition is presented in Figure 4. At molts 4, 5, and 6, the well-fed larvae added more segments than the semi-starved (t test, p < ). At molt 7, however, the semi-starved larvae added more segments than the well-fed ones (p < ) ; the same trend was apparent at molts 8 and 9, though the difference was not statistically significant (p < and ). The new segments develop from a posteriorly located proliferative region (lo- cated between the penultimate segment and the anal sgment) during the first few days of the instar preceding the molt at which they first become outwardly visible (this was confirmed histologically, and will be the topic of another paper). For example, new segments exposed by the molt (molt 4) to instar 5 actually developed during the first three days of instar 4. Consequently, since the early instar larvae are enclosed within the egg capsule until the fourth day of instar 3, dietary effects on segment addition could not be detected until the molt to instar 5 ; the segments added at molt 3 (from instar 3 to 4) were originally determined during the first few days of instar 3. At this time both starved and well-fed larvae were still in the egg 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
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