Provide the context of the project that demonstrates the reason for doing the work and its relevance to IMAS research priorities. The statement should clearly illustrate the relationship between this proposal, work done previously and other work in progress. Bear in mind that this will be used in the description of the project on the Web.
The research aims to document relationships between feed formulation, dietary uptake, growth and post-prandial respiration in juvenile rock lobsters. The project will be integrated into the ARC ITRH on the Commercial Culture of Rock Lobsters and inform the development of rock lobster feeds. There will be a focus on post-prandial respiration, often termed specific dynamic action (SDA), and it will continue research previously done at IMAS (Jensen et al. 2013). SDA has often been described as an energetic cost which implies it is wasted energy, however SDA also correlates with growth and reflects anabolic processes such as protein synthesis (Carter and Houlihan 2001, Fitzgibbon et al., 2007). The energy cost of protein synthesis accounts for a significant proportion of SDA. Whilst protein synthesis is stimulated by dietary plasma free amino acids the amount of synthesised protein retained as growth depends on the quantity and quality of dietary protein. The aims of the research are to quantify relationships between feed composition, ration and SDA over a range of feeds including benchmark commercial feeds as well as feeds formulated to compare the effects of protein quantity and protein quality. The research will improve our understanding of juvenile rock lobster nutritional physiology in relation to respiration, provide a standardised approach to assessing feeds using post-prandial respiration and therefore improve feed formulations.
Carter, C.G., Houlihan, D.F., 2001. Protein synthesis, In Fish Physiology. pp. 31-75.
Fitzgibbon, Q.P., Seymour, R.S., Ellis, D., Buchanan, J., 2007. The energetic consequence of specific dynamic action in southern bluefin tuna Thunnus maccoyii. Journal of Experimental Biology 210, 290-298.Jensen, M.A., Fitzgibbon, Q.P., Carter, C.G., Adams, L.R., 2013. Effect of body mass and activity on the metabolic rate and ammonia-N excretion of the spiny lobster Sagmariasus verreauxi during ontogeny. Comparative Biochemistry and Physiology - A Molecular and Integrative Physiology 166, 191-198.