Comparison of environmental parameters and growth of green mussel (perna viridis) culture in Marudu Bay and Ambong Bay, Sabah, Malaysia
A study to compare the environmental parameters and growth of Asian green mussel (Perna viridis) was conducted at Marudu Bay and Ambong Bay for 12 months (September 2017-August 2018). Marudu Bay was the main study area and as comparison Ambong Bay was selected. Physicochemical parameters (DO, pH, sa...
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| Format: | Thesis |
| Language: | English English |
| Published: |
2022
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| Subjects: | |
| Online Access: | https://eprints.ums.edu.my/id/eprint/40527/1/24%20PAGES.pdf https://eprints.ums.edu.my/id/eprint/40527/2/FULLTEXT.pdf |
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| Summary: | A study to compare the environmental parameters and growth of Asian green mussel (Perna viridis) was conducted at Marudu Bay and Ambong Bay for 12 months (September 2017-August 2018). Marudu Bay was the main study area and as comparison Ambong Bay was selected. Physicochemical parameters (DO, pH, salinity, current speed, water transparency, depth & chlorophyll-a), nutrient, sediment composition and heavy metal were studied in both locations. One station from each location was selected to study the correlation of growth parameters with the other parameters. A significant correlation was observed between the physicochemical parameters in Marudu bay either temporal or spatial. Temperature, salinity and chlorophyll-a were low during Northeast Monsoon (NEM) meanwhile water velocity, water transparency and DO was high during NEM compare to South West Monsoon (SWM). Nutrient was fluctuated throughout the sampling period. Composition of the silt-clay percentage and high concentration of heavy metal (Zn, Ni, Cr, Cu, Co and Pb) was also observed during NEM. Generally, the physicochemical, nutrient, sediment composition and heavy metal that was studied in Marudu bay was influenced by the monsoon especially NEM, where during this season, the rain was also found to be higher. The growth parameters (90 at each site) were found significantly correlated with physico-chemical parameters (dissolved oxygen, pH, salinity, temperature, water transparency, chlorophyll-a), nutrients (phosphate (PO4 3-), ammonia (NH3-N), nitrate (NO3-N) and nitrite (NO2-N), and condition index of green mussel from each study site, as well as between the study sites. The initial size (mean) of the mussel seed used was 47.7 ± 3.5mm, attained mean size of 73.47 ± 11.05 mm (increased 54%; SGR 0.17% ± 0.22) and 51.1 ± 3.9 mm, attained mean size of compared to 64.05 ± 7.44 mm (increased 25%; SGR 0.11% ± 0.22) for Marudu Bay and Ambong Bay at the end of the experiment. Meanwhile the cumulative mortality rates were 9.2% ± 4.9 and 55.5% ± 30.0 for Marudu Bay and Ambong Bay respectively. A Pearson correlation indicated a significant correlation between mortality and water transparency (r=0.856, p<0.05), water velocity (r=0.620, p<0.05), pH (r=0.506, p<0.01) and Pb (r=0.520, p<0.05). Meanwhile spearman rank order correlation, indicated a significant correlation between mortality and Ammonia (r=-0.561, p<0.01), Ni (r=-0.565, p<0.01) and Co (r=-0.519, p<0.01). A significant correlation between growth and Cd (r=-0.683, p<0.01) was also obrserved. Overall, the growth performance of green mussels farmed in Marudu Bay was better than in Ambong Bay, however, the mortality of mussels in Ambong Bay was higher. |
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