. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 168 R. L. SWANSON ET AL. Table 1 The histamine content of six algal species was significantly different (ANOVA. F,.M = P = ) Species Histamine (/ig • g ' [ww]) mean ± SE. n — 5 Delisea pulchra Ecklonia radiata Sargassitm vestintin Homeostrichus olsenii Coral/ina officinalis Amplnroa anceps ± ± * ± * ± * nd nd D. pulchra treatments (Fig. 5). SSW did not induce settle- ment. Quantitative analvsis of histamine content in algae The histamine content of six algal species was dete
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 168 R. L. SWANSON ET AL. Table 1 The histamine content of six algal species was significantly different (ANOVA. F,.M = P = ) Species Histamine (/ig • g ' [ww]) mean ± SE. n — 5 Delisea pulchra Ecklonia radiata Sargassitm vestintin Homeostrichus olsenii Coral/ina officinalis Amplnroa anceps ± ± * ± * ± * nd nd D. pulchra treatments (Fig. 5). SSW did not induce settle- ment. Quantitative analvsis of histamine content in algae The histamine content of six algal species was deter- mined by GC-MS (Table 1). D. pulchra, the alga on which new recruits of H. purpurascens are found (Williamson et ai. 2000), had the highest histamine content of all algae surveyed. Histamine was not detected in any samples of Amphiroa anceps or Corallina officinalis. The histamine content of D. pulchra. Ecklonia radiata. Homeostrichus olsenii, and Sargassum vestitum differed significantly from each other (F316 = , P = ). Pairwise compar- isons showed that the histamine content of D. pulchra ( ± /itg-g"1) was significantly higher than the histamine content of E. radiata ( ± jug • g"1, P = ), S. vestitum ( ± jug-g"', P = ), and H. olsenii ( ± ~', P = ). The amount of histamine in different D. pulchra plants was highly variable, ranging from fig-g"1 wet weight of algal tissue. The variability in histamine levels of E. radiata was also high, with no histamine detected in two samples, yet another contained jug • g"' wet weight of Reanalysis of samples from Williamson et al. (2000) * Indicates species in which histamine content differs significantly from D. pulchra (pairwise comparisons, P < ); nd, not detected; ww, wet weight. of the S. vestitum samples analyzed, but another contained ~' wet weight of algal tissue. The H. olsenii pl
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