population, which will permit an in- 

 crease in the concentration of orga- 

 nisms. It is also stated, however, that 

 this relation is not of particular signifi- 

 cance if the phytoplankton species in 

 question is tolerant of a wide range of 

 environmental conditions. The basis 

 used to assume intolerance is two per- 

 sonal communications, one from Luigi 

 Provasoli stating that G. breve is not 

 generally amenable to culture tech- 

 niques, and the other from Herbert 

 Graham stating that G^. breve is not 

 normally found in the marine phyto- 

 plankton of the region. We do not accept 

 these two premises. Furthermore, the 

 assumption that red tide is found in 

 very discrete water masses is at vari- 

 ance with the statement of most field 

 observers that red tide water occurs in 

 streaks, not in regular-shaped masses. 

 As confirmation of his theory, Slo- 

 bodkin mentioned red discoloration of 

 the sea observed at lat. 28°30' N. and 

 long. 84°30' W. from the vessel Alaska 

 on June 2, 1952. He stated, ". . . This 

 discoloration was caused by a dense 

 population of a red ciliate, probably 

 Mesodinium pulex Noland or a closely 

 related form (Kudo, 1947). The surface 

 salinity at a hydrographic station in 

 the discolored water (33. 4%o) was lower 

 than that at surrounding stations (34.99, 

 35.47, 36.17). This would seem to con- 

 firm the theory in so far as protista 

 in general are concerned, since the dis- 

 colored water was approximately 90 

 miles from the nearest coast." [p. 149, 

 151.] 



To these reviewers this is not con- 

 firmed by the data of the Alaska (Collier, 

 1958a). The station referred to was 

 located at lat. 28O30' N. and long. 84°32' 

 W. (station 36). We have prepared a 

 table showing pertinent data for this 

 and the "surrounding" stations, in- 

 cluding the three (Nos. 35, 38, and 40) 

 to which Slobodkin referred. The nearest 

 station was about 40 miles distant. It 

 may be noted further that two of the 

 three salinities to which he referred 

 were not at the surface but at 10 m. 

 Furthermore, at the station in question 

 (No. 36), the salinity chcinged (?) from 

 33.42 to 33,48 p.p.t. in 42 minutes. 



Slobodkin continued, "On the basis 

 of this evidence it can be stated tenta- 

 tively that red tides require a discrete 

 mass of water of relatively low salinity, 

 but this does not imply that salinity 

 difference is the sole requirement for 

 red tides. . . ." [p. 151.] He then gave 

 the following table of red-tide out- 

 breaks: 



"TABLE 1(a). --Date and Location of Red Tide off the Florida Coast, and 



Associated Rainfall 



Year 



Date of Initial Report 



Location of Rainfall (inches), Vbnth; 

 Red Tide Weather Station 



1844 

 1854 

 1878 



1880 



1882 



1883 



1885 



Unknown (ingersoll, 1882) Tampa Bay 

 Unknown (ingersoll, 1882) Tanpa Bay 

 September (Jefferson, et al., Florida Bay 



1878) 

 August (ingersoll, 1882) 



July 20 (Anonymous, 1882) 



Taupa Bay 



Mouth of Tanpa Bay 



15.79, August; Tampa 



15.5, July; Tampa 



9.40, August; 25.10, 



September; Miami 



6.40, July; 14.00, August; 



Tampa 



5.28, June; 10.44, July; 



Tanpa 



Reported by Brongersma-Sanders (1948) from Walker (1884). Reference to Walker's 

 original paper shows that these authors refer to the same 1880 outbreak. Walker's 

 paper was submitted for publication under date of December 21, 1880. 

 October (Glennan, 1886) Egmont Key to 10.64, September; 1.95, 



Charlotte Harbor October; Tanpa 



13.68, September; Manatee 



64 



