Investigation on Suitable Spat Collectiors and Culture Sites for Edible Oyster in the Coast of Bay of Bengal, Bangladesh

Abstract

Potential spat collectors and suitable culture sites were investigated for the development of edible oyster culture from June to December 2019 at three study sites (Moheshkhali, the Jeti of Nuniarchora, and Sonadia) of Cox’s Bazar coast of Bangladesh. Four types of collectors such as oyster shell, earthen pot, kortal (windowpane oyster shell) and tiles were investigated. On site sampling of water quality parameters and number of spats on each collector were done at 15-days interval following standard methods. Results indicated insignificant difference (P > 0.05) in temperature, salinity, dissolved oxygen and pH, while significant difference (P < 0.05) in total dissolved solids, total suspended solids and Chl-a content of the water among the study locations. However, these parameters were in suitable range for growth and spawning of oyster. Results also indicated spat recruitment was significantly influenced by the types of collectors and study locations with significantly (P < 0.05) higher spat were recruited in Tiles. Tiles were also found to facilitate with an advantage of recycling of this collector. The location in interaction with polluting materials such as total dissolved solids and total suspended solids had a significant effect on spat recruitment rate and therefore, Sonadia was the most suitable location for spat recruitment. This study site can also be used as a suitable location for the development of oyster culture in the cost of Bay of Bengal, Bangladesh based on its environmental characteristics. Bangladesh J. Zool. 49 (2): 257-265, 2021

Growth performance and survival of oyster, Saccostrea cucullata (Born, 1778) and green mussel, Perna viridis (Linnaeus, 1758) cultivated in Bangladesh Coast

“…For successful reproduction and growth, oyster community must maintain a pH of less than 9 (Mathew, 2008). The average pH of the experimental area was 7.63; whereas Asaduzzaman et al (2021) showed the highest pH value was 7.92 for green mussel culture in the Moheskhali channel and Hasan et al (2021) recorded 7.68 for oyster culture in the same area. Hence, Minhaz et al (2020) stated the pH range in between 6.4-8.2 during oyster farming in Cox's Bazar coast.…”

“…Temperature is one of the important factors for oyster and mussel culture. The filtering dynamism of the oyster depends on water temperature (Hasan et al, 2021;Ward et al, 2000). The rate of water transport, feeding, respiration, gonad formation and spawning possession affects by the temperature effect (Naik and Gowda, 2013).…”

“…The rate of water transport, feeding, respiration, gonad formation and spawning possession affects by the temperature effect (Naik and Gowda, 2013). During the study period, the recorded temperature was 28.20±0.3°C, but Hasan et al (2021) had the temperature ranging between 27.35±0.74 to 27.67±0.76°C in Cox's Bazar, which was suitable for the growth and recruitment of oyster spats. Khan et al (2020) observed Abu Bakker Siddique Khan et al /Arch.…”

“…Physiological variation i.e., shells closing and low filtering of oyster ensued due to low salinity (Metz et al, 2015). Asaduzzaman et al (2021) expositioned the maximum salinity 27-35 ppt for P. viridis and Hasan et al (2021) found 21.64 to 26.33 ppt for the suitability of oyster culture. Asaduzzaman et al (2019) also reported that the maximum salinity for P. viridis was 29.8 ppt in the Moheskhali channel.…”

“…There are many ecological processes that oysters are pursuing as ecosystem manager (Alexandra et al, 2010). Bangladesh empowers with bays and several estuaries that have the suitability for oyster aquaculture and can supply animal protein for poor people (Hasan et al, 2021). They are deliberated as remarkable species that provide residence, harbor and rations and are worthy tools for the waning brackish water biological community (Sanjeevraj, 2008).…”