Md Golam Sarwer


Graduated MPhil 2022

Thesis Title

Impact of Ecological Changes on Sydney Rock Oyster Genetics and Microbiomes

Research Project

The Sydney rock oyster, Saccostrea glomerata is cultivated mainly in New South Wales (NSW) and southern Queensland, Australia. It is considered a commercially valuable oyster species of the world. It also contributes the lion share to the Australian aquaculture industries. Production of this species of oyster has declined dramatically throughout the NSW and southern Queensland over the past 25 years. Possible factors for this marked decline include: QX disease, winter mortality disease, declining water quality and in recent times, estuarine acidification.

Oysters are entirely dependent on their environment for survival and growth. Temperature and salinity are two important abiotic factors that affect the physiology, stages of development and distribution of oysters. Other environmental factors that influence oysters include: suspended particles concentrations, light and pH. Oyster growers are unable to control water quality and hydrological conditions in the estuary and are limited to stock movement to protect oysters from adverse environmental conditions. In summer, heavy rainfall also causes sudden mass mortality of Sydney rock oyster in the estuary. A substantial drop of salinity has been recorded after heavy rain in many estuaries in NSW and Queensland, Australia. Therefore, the aim of my research was to understand the role of oyster microbiome in salinity stress in order to classify the Sydney rock oyster. This main objective was pursued with different approaches as here specified:

 Determine a stressful level of salinity to the oyster for the growth and survival.
 Understand many pathogenic and non-pathogenic microbes are associated with the digestive gland of S. glomerata to low level salinity.
 Test whether microbiome communities in cultivated and wild oyster can transfer from oyster to oyster.
 Developed EPIC (Exon Primed Intron Crossing) primer for distinguishing wild and cultivated oysters.

  • Postgraduate Research Scholarship for a research study at Hawkesbury Institute for the Environment (HIE), Western Sydney University, Richmond 2753, NSW, Australia.
  • Awarded as a National Research Fellow of the Government of the People's Republic of Bangladesh under Fellowship (2011-12) Program of National Science and Information & Communication Technology (NSICT), Bangladesh.

Md. Golam Sarwer, Md. Mahmudul Hasan Rony, Mst. S. Sharmin, A K Jilani Chowdhury and Shuva Bhowmik. 2017. ELISA Validation and Determination of Cut-off level for CAP residues in Shrimps and Fishes. Our Nature, vol.15. no.s 1-2, pp 13-18

Md. Golam Sarwer, Fayejun Nesa and A. K. Jilani Chowdhury. 2017. Detection of Salmonella Spp. in Shrimps by a Real-Time qPCR Method Validation in an Accredited Quality Control (QC) Laboratory of Bangladesh. Asian Journal of Biological and Life Sciences, vol.6, no.2, pp 338-350

Md. Belal Hossain, Md. Mosaddequr Rahman, Md. Golam Sarwer, Md. Yusuf Ali, Ferdous Ahamed, Sharmeen Rahman, Bernerd Fulanda, Mohammad Mustafizur Rahman, Bharat Raj Subba and Md. Yeamin Hossain. 2012. Comparative Study of Carp Pituitary Gland (PG) Extract and Synthetic Hormone Ovaprim Used in the Induced Breeding of Stinging Catfish, Heteropneustes fossilis (Siluriformes: Heteropneustidae). Our Nature, vol.10, no.1, pp 89-95


Dr Alexie Papanicolaou and Professor Jeff Powell