Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

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

Jakia Hasan*
Marine Fisheries & Technology Station, Bangladesh Fisheries Research Institute, Cox’s Bazar, Bangladesh

Md. Mozzammel Hoque
Riverine Station, Bangladesh Fisheries Research Institute, Chandpur, Bangladesh, 3Marine Fisheries & Technology Station, Bangladesh Fisheries Research Institute, Cox’s Bazar, Bangladesh, 3Research Division, Head quarter, Bangladesh Fisheries Research Institute, Mymensing, Bangladesh

Abstract/ Executive Summary:

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 hard cover, earthen pot, kortal (windowpane oyster hard cover) 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.

Keywords: Collectors, Oyster spat, Recruitment, Oyster culture, Two-way ANOVA, Bay of Bengal

Location: Moheshkhali, Jeti of Nuniarchora, and Sonadia of Cox’s Bazar coast of Bangladesh.

Start Date: 00-06-2019

End Date: 00-12-2019

Program Area: Resource Development and Management

Commodity: Oyster

Objectives:

None of these collectors yet not been evaluated for spat collection in the coastal area of Bangladesh. Therefore, in the present study, attempts were made to investigate the most effective collectors for oyster spat collection. Furthermore, this study also provided information for the selection of suitable location for oyster farming based on the evaluation of water quality parameters.

Methodology:

The study was conducted for a period of 7 months from June to December 2019. Three potential locations were selected by pre survey at the Moheshkhali, Jeti of Nuniarchora, and Sonadia of Cox’s Bazar coast of Bangladesh.

Water temperature was measured using a Celsius thermometer and water pH using an electronic pH meter (Jenwary 3020). Dissolved oxygen (DO) was measured by a portable aquaculture kit (Model FF2, HACH, USA) and salinity with a salinity meter (YSI Multiprobe 556MPS). Total dissolved solids (TDS) and Total solid suspended (TSS) were measured with an EC, TDS tester (Adwa AD31 waterproof EC/TDS Testers) and gravimetric method (APHA, 1995). Concentration of Chl-a was determined by spectrophotometry using the method of Jeffrey and Humphrey (1975).

4 clutch materials such as oyster hard cover, earthen pot, kortal (windowpane oyster hard cover) and tiles were used oyster spat collection. 12 cultch materials were placed (each with a distance of 10-12 cm) into a 1.5 m length roof. The roofs were than hanged beneath the Jeti located in the study locations. Bimonthly, during low tides, the collectors with oyster spat were withdrawn, and replaced with the new one. The number of spat recruited on each collector was counted and calculated per m2 area of each type of collector.

Data on water quality parameters and spat density were analyzed to ensure the normality using the Kolmogorov-Smirnov test and homogeneity of variance using Cochran tests (P < 0.05). One-way analysis of variance (ANOVA) was used to compare the mean values of water quality parameters among the study locations. To determine the influence of factors such as collector’s type and study locations, Two-way analysis of variance and Duncan multiple range test (P < 0.05) were performed. Finally, the correlation between the density of spats at each of the collectors and water quality parameters were evaluated by Pearson correlation matrix in package ggplot2 in R statistical program. All the analyses were performed in Statistical Package for Social Science (SPSS) version. 20.

Source of Information: Bangladesh J. Zool. 49 (2): 257-265, 2021 ISSN: 0304-9027 eISSN: 2408-8455

Article Link (Online Journal): DOI: https://doi.org/10.3329/bjz.v49i2.56262

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The present study revealed that the best location for collecting oyster spats should be equipped with abundant food availability and less pollution in terms of total dissolved solids and total suspended solids. Therefore, Sonadia was proved to be the best place for spat collection and might be a suitable location for the development of oyster culture in the cost of Bay of Bengal. Regarding the collectors, all were suitable for spat collection. However, the best choice would be Tiles as the density of oyster spats was higher in Tiles. Besides this, recycling of the Tiles provided an advantage, as the cost relating to the buying of collectors was low.

Knowledge Management: Journal