Roslizawati Ab Lah

Roslizawati Ab Lah

PhD candidate

Research Summary

Roslizawati Ab Lah completed her undergraduate at University Malaysia Terengganu in Terengganu, Malaysia. Soon after her graduation, she was awarded a tutor position at the same university, assisting the lecturers in practical for the subjects; Dynamic Population and Fish Biology. In 2010, she completed her Master's in Fish Biology and Management from University of Bergen, Norway. She came to Southern Cross University in 2012 under scholarship of Ministry of Higher Education Malaysia for PhD. Her PhD research is focusing on marine snails in the family Turbinidae (Turbo militaris and Lunela undulata).

Temperature is one of the factors that impacts the kinetic energy and biochemical reactions in organisms. Considering the global changing scenario, increases in temperature could make aquatic ectotherms vulnerable to thermal stress. Low pH is an additional stress associated with ocean climate change that may also impact an organism's biochemistry and nutritional properties. To determine the tolerable temperature of the snails, critical thermal maximum (CTMax) and preferred temperature were assessed for both Turbinidae species. In order to observe the impact of elevated temperature and ocean acidification on the biochemical composition of the snails, a manipulative experiment has been undertaken at the National Marine Science Centre. Proximate composition (moisture, protein lipid, ash, carbohydrates) and fatty acid analysis will be used as means for comparing the nutritional quality of the snails under different treatment regimes. Since the reproductive cycles for organisms are strongly influenced by energy utilization, understanding the seasonal variation of biochemical composition in relation to the gonadal development will also provide valuable information for fisheries management. The information presented in this research will provide valuable information about Turbinidae molluscs as a dietary source for humans and how their nutritional quality may be impacted by seasonal variation and long term climate change.

Supervisors: Dr Kirsten Benkendorff and Dr Daniel Bucher