. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. GROWTH INHIBITION IN 171 0) o cr * o. J I 4 5 10 row FIGURE 3. Compartment models corresponding to Figure 2. Growth rate (ordinate, arbitrary units) is plotted against compartment number in a catenary array (abscissa). Pro- duction of inhibitory principle is higher in compartments 5-10. In A, the turnover rate con- stants A'ji and A'u (see compartmental analyses) are symmetrical; in B, the &u's are negligible; in C the A'ij's are small but not negligible. sump (Fig. 1. M). Secondly, the UV treatment could have
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. GROWTH INHIBITION IN 171 0) o cr * o. J I 4 5 10 row FIGURE 3. Compartment models corresponding to Figure 2. Growth rate (ordinate, arbitrary units) is plotted against compartment number in a catenary array (abscissa). Pro- duction of inhibitory principle is higher in compartments 5-10. In A, the turnover rate con- stants A'ji and A'u (see compartmental analyses) are symmetrical; in B, the &u's are negligible; in C the A'ij's are small but not negligible. sump (Fig. 1. M). Secondly, the UV treatment could have resulted, for example, in the production of short-lived ionized molecules with an adverse effect upon growth. Third, it is possible that "natural" sea water, either because of the presence of a substance removed by lobsters or through the absence of a "conditioning" substance produced by lobsters, is not as conducive to growth of lobsters as is lobster-conditioned water (see Cobb and Tamm, 1975a). But if the effect in our systems were attributable to the makeup water, it should be more pronounced in System I with the higher makeup fraction, which a separate two-factor factorial ANOVA on just the first four rows of trays A failed to show. Therefore, if a "conditioning" substance is responsible, it must be removed from the recirculation water before the latter re-enters tray A.) Density-dependent growth inhibition appeared instead to be a short-lived effect of animals in the immediate neighborhood, , an effect which dies away with distance, and was obviously asymmetrical, , more pronounced downstream. Fig- ure 3A indicates schematically what we would expect from a compartmental model (see compartmental analyses above) of a 15-compartment column with symmetrical upstream and downstream turnover constants /etj and k^ for the transmission of a short-lived inhibitory influence. Figure 3B shows the pattern anticipated were the upstream flow compl
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