Oscillatoria spp

Neurotoxin obtained from freshwater blue-green cyanobacteria (Anabaena spp., Aphanizo-menon spp., and Oscillatoria spp.). It is the only known organophosphate toxin produced by cyanobacteria. 

Microcystis, Nostoc, Nodularia, and Oscillatoria spp., Dinofl. of worldwide distribution... 

Saino, T., and Hattori, A. (1982). Aerobic nitrogen fixation by the marine non-heterocystous cyanobacteria Trichodesmium Oscillatoria) spp. Its protective mechanism against oxygen. Mar. Biol. 70, 251-254. 

Daphnia appeared after the decline of inedible cyanobacteria (Oscillatoria spp.), and thrived due to a sustained 10% decrease in its voracious predator Neomysis mercedis in 1965. The decrease in Neomysis occurred at about the same time as the introduction of longfin smelt, a predator known to specialize in eating Neomysis (Edmondson, 1994). Helped by a rapid flushing rate (2.3 yr) and stable dissolved phosphorus inputs since the end of sewage diversion (Edmondson, 1994), Lake Washington remains mesotrophic. 

Second, off-flavors can be acquired by some fish when grown in earthen ponds and this presents marketing problems. Off-flavors are mainly caused by the rapid absorption of compounds produced by cyanobacteria. The most common off-flavors in aquaculture are two metabolites of Oscillatoria spp. and Anabaena spp.—geosmin and 2-methylisobomeol. The sensory properties and kinetics of uptake and depuration of these chemicals in fish have been reviewed elsewhere (Howgate, 2004). The off-flavors produced by cyanobacteria have no adverse affect on the health of the fish or the consumer however, they do have a substantial impact on marketability. The elimination of these compounds is much slower than the rate of uptake, and the depuration rate is reduced as water temperature decreases. 

FIGURE 37.7 Microscopic view of a planktonic bloom consisting of Microcystis spp., Oscillatoria spp., and Anabaena spp. collected from a fish pond on the Clarence River, New South Wales, Australia. The ponds were used for culturing silver perch (Bidyanus bidyanus) (40x magnification). 

Off-flavors have also been reported in silver perch (Bidyanus bidyanus) from Australian fish farms (Rowland et al., 1995). Microscopic examination of the planktonic blooms reveals a wide variety of cyanobacterial species (Figure 37.7) and mouse bioassays show that they can be toxic (unpublished). In rainbow tront farms in the United Kingdom, the cause of off-flavors was unknown until a stndy attribnted it to blooms of Oscillatoria spp. in the rivers that feed the trout farms (Robertson et al., 2006). Levels of geosmin in fish tissue were typically in the range of 1.0-3.0 Tg/kg, while... 

Cyanobacteria -/Anafaaena spp. and Oscillatoria sp. (Planktothrix spp.) Cyanobacteria - Planktothrix spp. 

Thacker RW, Starnes S (2003) Host Specificity of the Symbiotic Cyanobacterium Oscillatoria spongeliae in Marine Sponges, Dysidea spp. Mar Biol 142 643... 

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