. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 51-31-31 4 7 N Z M 14 17 21 24 PL o < o ± 025 O UJ Q. W 020 015 010 005 000 AMYLASE (GLYCOGEN). / 7 10 14 17 21 24 35 N Z M PL DEVELOPMENTAL STAGE Figure 5. Specific activity ofamylase (with substrate indicated) for developmental stages of Pcnaeus seliferus. obtained from whole-ani- mal homogenates. Activity expressed as International Units of activity per mg protein in entire animal. Solid versus broken lines indicate sepa- rate spawnings. Error bars indicate 95% confidence interval about mean activity for each developme
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 51-31-31 4 7 N Z M 14 17 21 24 PL o < o ± 025 O UJ Q. W 020 015 010 005 000 AMYLASE (GLYCOGEN). / 7 10 14 17 21 24 35 N Z M PL DEVELOPMENTAL STAGE Figure 5. Specific activity ofamylase (with substrate indicated) for developmental stages of Pcnaeus seliferus. obtained from whole-ani- mal homogenates. Activity expressed as International Units of activity per mg protein in entire animal. Solid versus broken lines indicate sepa- rate spawnings. Error bars indicate 95% confidence interval about mean activity for each developmental stage. Sample size for each mean is indicated by numbers above or below bars. N, nauplius stage 5; Z, protozoeal stages 1-3: M, mysis stages 1-3: PL. age of postlarvae in days. mah, 1970; Jones, 1973; Chong and Sasekumar, 1981; Nelson, 1981; Gleason and Zimmerman, 1984; but see also Kitting el al, 1984; Gleason, 1986). In PL:s-PL35, enzyme activity increases substantially. Despite the correlation of ontogenetic change in en- zyme activity with change in feeding habits, ontogenetic change in activity may be developmentally cued and may reflect temporal genetic regulation of enzyme syn- thesis, rather than a change in diet. For example, ontoge- netic change of digestive enzyme activity in the first feed- ing stages of Homarus larvae occurs even in the absence of access to exogenous food substrates (Biesiot, 1986). In Anemia, ontogenetic change in enzyme synthesis is likely under genetic control, which then is modulated by diet and nutritional requirements (Samain et al., 1980). Moreover, no consistent correlation of A/P ratio with composition of diet has been found within a single crus- tacean species (Hoyle, 1973; Boucher et 1976; Sa- main el 1980;Mauglertfl/.. 1982b; Bamstedt, 1984; Harris et 1986). Because both amylase activity and the A/P ratio in P. set (ferns increase during postlarval development, it might be inferred that postlarval shrimp become more
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
