IIUM Repository

Effects of pH and water turbulence on the growth of harmful algae pyrodintum bahamense var. compressum

Muhamad Shaleh, Sitti Raehanah and Edrews, Dianecia and Mohammad Noor, Normawaty and Anton, Ann (2010) Effects of pH and water turbulence on the growth of harmful algae pyrodintum bahamense var. compressum. In: Annual Seminar on Marine Science and Aquaculture: Indicators for Sustainability of Fisheries and Aquaculture, 10-12 March 2010, Universiti Malaysia Sabah.

Download (899kB) | Preview


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)

Item Type: Conference or Workshop Item (Poster)
Additional Information: 23331/25328
Subjects: Q Science > Q Science (General)
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Science > Institute of Oceanography and Maritime Studies
Depositing User: Dr Normawaty Mohammad Noor
Date Deposited: 17 Sep 2013 12:33
Last Modified: 25 Mar 2015 09:38
URI: http://irep.iium.edu.my/id/eprint/25328

Actions (login required)

View Item View Item


Downloads per month over past year