. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 396 M. I. LATZ AND J. F. CASE Table I kinetics ol the luminescent responses / Sergestes similis Condition "On" latcncv (s)* Half rise time (s)* "O1T latency (s)t Half decay time (S)f Induction Counterillumination ± (4) ± (11) ± (3) ± (11) ± (2) ± (10) ± (2) ± (11) * Mean values for induction and counterillunimation conditions are significantly different (Two-sample T test, t > , P < ). t No significant difference between means fo
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 396 M. I. LATZ AND J. F. CASE Table I kinetics ol the luminescent responses / Sergestes similis Condition "On" latcncv (s)* Half rise time (s)* "O1T latency (s)t Half decay time (S)f Induction Counterillumination ± (4) ± (11) ± (3) ± (11) ± (2) ± (10) ± (2) ± (11) * Mean values for induction and counterillunimation conditions are significantly different (Two-sample T test, t > , P < ). t No significant difference between means for test conditions (t ). Values represent means with standard errors of the mean; number of observations given in parentheses. ferent from seawater controls (Mann-Whitney U test, U = 42, P ) (Fig. 5). The specificity of serotonin in stimulating biolumines- cence was further investigated (Fig. 5). A solution of se- rotonin and tluoxetine, a serotonin uptake inhibitor, did not produce significantly higher levels of light emission compared to serotonin alone (Mann-Whitney U test. U = 18, P > ). nor did a solution of serotonin and cin- anserin, a serotonin antagonist, produce significantly lower levels of light emission (Mann-Whitney U test, U = 18, P > ). There was no difference in the response latencies for these conditions from that of serotonin alone (Kruskal-Wallis test, P > ). Treatment with PCA, a serotonin releasing agent, and 10 3 M 5-MT, a serotonin agonist, did not result in significant production of lumi- nescence (Mann-Whitney U-test, P> ). Isolated hepatopancreas tissue containing the light or- gans produced background levels of luminescence that were significantly higher than for intact animal seawater controls (Fig. 5, 6C) (Mann-Whitney U-test, U = 55, P ).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrat
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