Aug 2017 - International Aquafeed magazine

CREATE, NURTURE, AND GROW AQUACULTURE International Aquafeed’s “Aquaculture photography competition” Photographers everywhere are invited to submit digital photographic work on the theme of ‘Create, Nurture and Grow Aquaculture’. International Aquafeed is holding it’s second ‘Aquaculture digital photography competition’ to promote and support the charity Aquaculture without Frontiers CIO UK. Submissions are still being accepted for the foreseeable future, fixed date to be announced in next month’s issue of International Aquafeed. Aquaculture is rapidly being seen as the way forward for a safe food future. Once looked upon with mistrust, now consumers are starting to see the industry as the only way they want to eat their fish. International Aquafeed magazine aims to continue to boost aquacultures reputation and reflect the best image of our industry and what better way to do that than through photography? Funds raised through the 2017 competition will go to the charity we support, Aquaculture without Frontiers CIO UK, to support small-scale aquaculture production in communities in developing countries.” Works will be enlarged and reproduced to the scale of approximately 20” x 30”. Therefore, the submitted work must be of sufficiently high quality (eg. sharp, clear, good contrast, well-exposed) for reproduction and printing process. An industry panel will carry out an initial judging. The final 20 works will be viewed by a ‘Judges Panel’ comprised of three judges who will be looking for images that illustrate the aquaculture theme in interesting ways that engage the viewer; originality and creativity, image quality and overall artistic merit. If your entry is judged in the top three by the Selection and Judges Panel you will be awarded one of three prizes. PRIZES 1ST PRIZE – IPAD PRO 12.9-INCH (128GB) 2ND PRIZE – US$500 3RD PRIZE – US$300 Winning photographs will be printed as posters and showcased at the European Aquaculture Society’s Dubrovnik 2017 Conference to be held in Croatia on October 17-19, 2017. Terms and Conditions Entry: Free of charge Eligibility: Open to all photographers, amateur to professionals worldwide Submissions: Your entries must be sent by email to: photocomp@aquafeed.co.uk For more information and full terms and conditions visit: www.aquafeed.co.uk/photocomp17

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Ioannis Zabetakis

Food security and …olives y relationship with olives is a precious one. I have some memorable events in this path: reading about olive oil when I was a primary school student, analysing olive oil in my BSc years, planting my own olive trees in our garden and then talking to my kids about Olympic Games and olives where the winners were not given any medals but an olive wreath. In my Academic research later, I developed a long standing interest in the byproducts of olive industry and olive pomace (OP) in particular. OP is the main agricultural by-product of olive industry; because of its nature, it is a major environmental issue for all the olive-producing countries. Research on the wastemanagement issues of OP has been active over the 15 years and all the available data suggest that OP could be exploited as an alternative dietary lipid source in compounded fish feeds resulting in the formulation of functional fish feeds and aquacultured fish according to the EU legislation (EC 1924/2006). Moreover OP can also be used in agriculture by inclusion in animal feeds without attenuating animal performance and meat quality. We have developed a patented novel fish feed and fish based on the valorisation of OP (Nasopoulou et al., 2011). In some exciting relevant developments, the potential of dry olive cake in a practical diet for juvenile hybrid tilapia, Oreochromis niloticus × Oreochromis aereus, has been recently reported (Harmantepe et al., 2016). A feeding trial was carried out to evaluate the effects of olive cake (OC) on growth, feed utilisation, digestibility of nutrient, haematological values and some blood chemistry parameters of juvenile hybrid tilapia (Oreochromis niloticus × Oreochromis aereus). The best feed conversion rate and protein efficiency rate were obtained from the fish fed with the control and OC12 diets. Growth performance, feed conversion rate and protein efficiency rate of fish fed diets with OC incorporation levels of more than 12 percent tended to decrease significantly (P < 0.05) compared to the control and OC12 diet groups. The findings of that study suggest that OC can be incorporated to diets of juvenile hybrid tilapia up to 120 g kg−1 without any adverse effect on fish growth and feed utilisation (Harmantepe et al., 2016). The future challenges would be to exploit OP and OC further in salmonids. If you are interested in developing a research project along these lines, I would be delighted to hear from you. Enjoy the summer!