Effects of pH and water turbulence on the growth of harmful algae pyrodintum bahamense var. compressum
Pyrodinium, a red tide causing dinoflagellates are often related to toxicity cases particularly paralytic shellfish poisoning (PSP). Study on the effects of specific parameter on the growth it fy*ai"iin is essential to determine the potential factors r-esponsible for thek occurrences. The effec...
| Main Authors: | , , , |
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| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
2010
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/25328/ http://irep.iium.edu.my/25328/1/2010-5.pdf |
| Summary: | Pyrodinium, a red tide causing dinoflagellates are often related to toxicity cases particularly paralytic shellfish poisoning (PSP). Study on the effects of specific parameter on the growth it fy*ai"iin is essential to determine the potential factors r-esponsible for thek occurrences. The effects or iH ana turbulence on the growth of Pyrodinium bahamense var. compressun was conducted in laboratory under controlled conditions. P bahamense was cultured in nine different pH levels under two conditions; with and without water turbulence.
The experiments were conducted under constant light intensity 100 pmolm-2s{ at 25"C with photoperiod of 12h'light:12 h dark bycle. Cells were incubated for two weeks'and **pri"gr *";;;;" for growth
deterrnination every day at interval. This study shows thatP bahamenseattained the highest cell density (616
cells mT:t; when grown at pH 8-5 without water motion. However, in the presence of Ilow water turbulence
or water motion, the cell density is relatively low (128 cells ml,-r) at pH 8.5. These different outcomes might
be due to the growth inhibitory effect of water motion to P bahameise. Celldensities of p. bahamensewere
also found significantly lower at acidic conditions (< 7.0) and at higher pH (> 9.0) |
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