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Hauville M.R.,University of Stirling | Hauville M.R.,Center for Marine and Freshwater Aquaculture Research | Zambonino-Infante J.L.,French Research Institute for Exploitation of the Sea | Gordon Bell J.,University of Stirling | And 2 more authors.
Aquaculture Nutrition | Year: 2016

This study examined the effect of a commercial mix of Bacillus sp. on survival, growth and digestive enzyme activities of Florida pompano, red drum and common snook. Larvae were fed either live feed enriched with Algamac 3050 (Control), Algamac 3050 and probiotics (PB), or the previous diet combined with a daily addition of probiotics to the tank water (PB+). Survival was not affected by the treatments for any of the species. At the end of the pompano and snook trial, standard lengths of larvae from the PB and PB+ treatments were significantly greater than for the control larvae. Microbiological analyses were performed at the end of the pompano trial, and numbers of presumptive Vibrio were not a concern in the system. For both pompano and snook, trypsin-specific activity was higher in PB and PB+ larvae compared with the control larvae. Similarly, alkaline phosphatase activity was higher for the pompano larvae fed the PB and PB+ treatments and for the snook larvae fed the PB+ treatment compared with the control larvae. This experiment suggests that a mix of Bacillus sp. can promote growth through an early maturation of the digestive system during the early larval stages of pompano and snook. © 2016 John Wiley & Sons Ltd. Source


Hauville M.R.,University of Stirling | Hauville M.R.,Center for Marine and Freshwater Aquaculture Research | Zambonino-Infante J.L.,Functional Physiology of Marine Organisms Unit | Bell G.,University of Stirling | And 2 more authors.
Aquaculture | Year: 2014

In this study, three microdiets were tested on weaning of Florida pompano larvae: Otohime, Gemma and a reference diet LR803. The experimental system was stocked with 11-day-old larvae, which were co-fed micro-diets and live food from 11. dph to 17. dph then micro-diets only until 28. dph. Survival from 11. dph to 28. dph was similar for all treatments, with an average of 33%. At the end of the trial, the Gemma larvae were significantly longer and heavier than those larvae fed the other diets. Significant differences were observed in fatty acid composition of the diets and larvae between treatments. The Gemma larvae incorporated the lowest amount of eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA) and arachidonic acid (ARA). However, they had the highest DHA/EPA and ARA/EPA ratios, which is in agreement with the concept that the proportions of polyunsaturated fatty acids could be of greater importance than their absolute amount. Results from the enzyme analysis suggest that fishmeal is suitable as the main protein source for Florida pompano larvae. This study gives new insights on Florida pompano early nutritional requirements and demonstrated the full functionality of the pancreas at 16. days post hatch, opening possibilities of an earlier weaning time. © 2013 Elsevier B.V. Source

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