Salinity Preference of Two Diatoms and Their Growth Performance in Three Prepared and Two Alternative On-Farm Media Sources |
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| Authors: | M A Kabir Chowdhury Nani Gopal Das Ehab El-Haroun Manik Lal Bose |
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| Institution: | 1. Institute of Marine Science, University of Chittagong , Chittagong, Bangladesh;2. University of Guelph, ON, Canada &3. The World Fish Center , Malaysia mchowdhu@uoguelph.ca;5. Institute of Marine Science, University of Chittagong , Chittagong, Bangladesh;6. University of Cairo , Egypt;7. The World Fish Center, Jalan Batu Maung, Batu Maung, Bayan Lepas , Penang, Malaysia , 11960 |
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| Abstract: | ABSTRACT Salinity and preferred nutrient composition of Chaetoceros affinis and Skeletonema costatum were tested. Salinity was tested at 12, 16, 23, 28, and 32 ppt. Three compositions of nitrogen (N), phosphorus (P), and potassium (K) and two on-farm low-cost alternative media sources, cow urine (CU) and hatchery waste water (HWW), were tested to find the suitable NPK ratio and to determine the efficacy of the on-farm media respectively. Chaetoceros affinis preferred 23 ppt salinity, while Skeletonema costatum preferred both 28 and 32 ppt. Among the NPK treatments, higher cell density was observed in 4:1:1 followed by 4:2:1 ratios. Significant differences in maximum cell density of both species were observed in the NPK treatments while only S. costatum showed significant difference in CU and HWW. |
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| Keywords: | Chaetoceros affinis Skeletonema costatum salinity preference NPK ratio cow urine hatchery waste water |
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