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David S. Francis
Deakin University
73Publications
22H-index
1,378Citations
Publications 73
Newest
#1Jessica A. Conlan (Deakin University)H-Index: 3
#2Craig Humphrey (Australian Institute of Marine Science)H-Index: 21
Last.David S. Francis (Deakin University)H-Index: 22
view all 5 authors...
Abstract Developing an optimal heterotrophic feeding regime has the potential to improve the growth and overall health of captive corals. This study evaluated the efficacy of seven unique feeding strategies for Acropora loripes, Acropora millepora, and Acropora tenuis nubbins: a novel, micro-bound diet (ATF), a novel, dissolved diet rich in long-chain polyunsaturated fatty acids (LC-PUFA) (LONG), a novel, dissolved diet lacking in LC-PUFA (SHORT), a phytoplankton diet of Isochrysis galbana (ALG)...
#1David S. Francis (Deakin University)H-Index: 22
#2Benjamin J. Cleveland (Deakin University)H-Index: 2
Last.Jessica A. Conlan (Deakin University)H-Index: 3
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Abstract The Murray cod (Maccullochella peelii peelii), an iconic Australian freshwater fish, is subject to a small but growing aquaculture sector in Australia. Optimal larviculture techniques for this species have yet to be established, particularly with regard to the nutritional quality of starter diets. As such, optimisation of current Murray cod hatchery practices and feeding regimes is essential to maximize the production of high quality larvae and expand commercial aquaculture prospects. T...
#1Meimei Liu (Shanghai Ocean University)
#2Qiangmei Feng (Shanghai Ocean University)
Last.Xugan Wu (Shanghai Ocean University)H-Index: 15
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Abstract Tamoxifen (TAM) is an antiestrogenic agent and can enter the aquatic environment in wastewater. It has been reported that TAM can induce hepatic steatosis in vertebrates, however, the effects of TAM exposure on lipid metabolism of hepatopancreas in crustaceans remains unclear. In this study, four TAM concentrations (0, 6.7, 13.4 and 20 μg g −1 crab body weight) were injected into the swimming-leg of swimming crabs Portunus trituberculatus , as a means of evaluating the effects of TAM on...
#1Melissa M. RockerH-Index: 3
#2David S. Francis (Deakin University)H-Index: 22
Last.Line K. Bay (JCU: James Cook University)H-Index: 21
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Fatty acids (FA) play a vital role in coral physiology, metabolism and stress resistance. Optimal health requires a balance of fatty acids, and more specifically essential polyunsaturated fatty acids (PUFA), for efficient biochemical and physiological functioning. Therefore, it is necessary to fully assess and evaluate the viability of FA as biomarkers for monitoring the health of coral populations. This study explores seasonal and spatial variation in the abundance of 17 FA in the coral Acropor...
#1Thomas S. Mock (Deakin University)
#2David S. Francis (Deakin University)H-Index: 22
Last.Giovanni M. Turchini (Deakin University)H-Index: 35
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Abstract A common strategy for aquafeed manufacturers has been the utilisation of relatively large amounts of terrestrial, both animal and plant, oil sources to produce diets with a high energy content. The provision of high fat diets is aimed at promoting the utilisation of energy from lipid, thus increasing the amount of dietary protein used for tissue synthesis. However, in recent years the cost of marine sourced dietary lipids has risen, at the same time, farming operations are under increas...
#1Melissa M. RockerH-Index: 3
#2Carly D. Kenkel (SC: University of Southern California)H-Index: 12
Last.Line K. Bay (JCU: James Cook University)H-Index: 21
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Abstract To investigate plasticity in biochemical and physiological health attributes of corals, identical colony fragments of the coral Acropora tenuis, from two inshore populations, were exposed to native and novel environmental regimes. Variation in global gene expression (GE) and lipid and fatty acid (FA) composition of surviving colony fragments were quantified after four months. Major FA classes, with the exception of short-chain (C18) polyunsaturated fatty acids (PUFA), decreased in conce...
#1Thomas S. Mock (Deakin University)
#2David S. Francis (Deakin University)H-Index: 22
Last.Giovanni M. Turchini (Deakin University)H-Index: 35
view all 7 authors...
Abstract There is a growing trend of ‘replacing’ long-chain omega-3 polyunsaturated fatty acid (n-3 LC PUFA) rich oils with C 18 shorter-chain omega-3 polyunsaturated fatty acid rich oils in Atlantic salmon aquafeed formulations. n-3 LC PUFA, including 20:5n-3 and 22:6n-3, play contrasting physiological roles and are metabolised differently in comparison to C 18 PUFA. Accordingly, the present study recorded the effect of replacing n-3 LC PUFA rich dietary fish oil with C 18 n-3 PUFA rich camelin...
#1Michael J. Lewis (Deakin University)H-Index: 3
#2David S. Francis (Deakin University)H-Index: 22
Last.Mark A BoothH-Index: 20
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Abstract Rendered terrestrial animal by-product meals (ABPM) are commonly used in aquafeeds for fish and shrimp. However, the nutrient composition and digestibility of these products is often variable due to differing processing conditions. As such, the aquafeed industry could benefit from technologies that rapidly assess the nutritional quality of ABPM prior to purchase and their incorporation into aquafeeds. To be useful, new technologies would need to accurately reflect the results of traditi...
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