Tuesday, November 18, 2014

18/11/2014: IAF editor outlines content of last edition for 2014

Welcome to the latest edition
by Professor Simon Davies, Editor - International Aquafeed

Greetings from Cascais in Portugal in bright sunshine and a mini heatwave for this coastal region of the country.  

Professor Simon Davies of Plymouth University, UK

I am attending the annual Biomarine Business forum where several hundred delegates are descending from many countries to discuss commercial opportunities and technologies pertaining to the marine environment. Although the emphasis is strongly on marine biotechnology, there is a session on aquafeeds with topics concerning novel feed ingredients from vegetable sources and industrial by-products. Of course marine macro-algae and seaweeds will feature mainly with invited speakers and experts in the field.

This meeting will be graced by the presence of the President of the State of Portugal, Prime Minister, Secretary of State for the Ocean and His Serene Highness, Prince Albert II of Monaco, Patron of Monaco Blue, part of his foundation that promotes marine conservation and sound environmental stewardship. In the next issue, I will be reporting on the meeting and its general findings and conclusions.

In the current issue, I report on our highly successful Aquatic China symposium in September and the associated VIV event that attracted so much interest and wide support across the aquaculture feed sector in Asia as well as in China. This was partly organised by Perendale and heralds more such fruitful meetings for the future.

The quest for good alternative protein concentrate feed ingredients is paramount and we are always casting our eye on tropical varieties for application. We report on:

Utlisation of Roasted Guar Korma – as an alternative for fishmeal and soybean meal in shrimp diets by Eric De Muylder, Diana Pablos, Milivoj Rubcic and Leon Claessens. Roasted Guar Korma is a high protein raw material, obtained after extraction of Guar gum from the seeds of the leguminous plant Cyamopsis tetragonoloba. It is cleaned and roasted after the gum extraction to remove anti-nutritional factors present in korma, such as trypsin inhibitor, improving its nutritional values and total digestibility.

Algae is so contemporary in its potential for use in aquafeeds that we have often articles to review. Hence a report on:  Algae in ornamental fish feeding by Dr Aleksandra Kwasniak-Placheta, Tropical, Chorzow, Poland and Prof. Dr Leszek Moscicki, Lublin University of Life Sciences, Doswiadczalna Lublin, Poland.

The development of aquafeed production is followed by the growing interest in raw materials which are to be interesting, attractive and valuable, not only in terms of their properties. There is no doubt that algae are one of them. Feeds with the addition of algae are perceived as premium products. This can result from the fact that algae evoke certain associations with healthy food for humans. Animal food with algae may then trigger the same positive associations. Moreover, specially processed algae or feeds with the addition of algae offered by the producers allow for keeping popular algae-eating freshwater and marine fish in excellent condition.

The development of Single Cell Proteins (SCP’s) continues with our report on Hydrolyzed yeast as a source of nucleotides and digestible nutrients in shrimp nutrition by Melina Bonato, PhD Research and Development Coordinator, ICC Brazil.

Aquaculture production has greatly increased over the last 20 years. In intensive production methods, decrease of water quality, increase of stress, decrease of food quality, and increased bacterial, viral or parasite infections can suppress the shrimp growth. The high susceptibility to stress and the rapid spread of diseases in water have forced fish farmers to concentrate on maintaining their fish in good health in order to achieve economic performance in shrimp under intensive rearing conditions.

In our concerns for fish welfare and production efficiency it is important to examine physiological processes that can impact on growth and feed utilisation efficiency in aquaculture scenarios so temperature tolerance is of concern in many species. We feature a scientific appraisal of Temperature stress. This article provides a review on the nutritional physiology of aquatic animals affected by temperature fluctuations with some recently published data.

Albert Tacon is back with an article: securing the future - Aquaculture growth and role in global food production by Albert G.J. Tacon of Aquatic Farms Ltd, Kaneohe, HI, USA and Marc Metian of the International Atomic Energy Agency, Monaco, Principality of Monaco. Aquaculture has been the world’s most rapidly growing food sector for over a quarter of century, with total global production (includes all farmed aquatic plants and animals) increasing nine-fold from 10.2 million tonnes in 1984 to a new record high of 90.4 million tonnes in 2012

We also feature catfish in this issue controversial due to the many various unrelated species’ termed generically catfish and causing some concern due to mis-labelling and fish being 'passed off' as other more highly valued fish caught wild such as cod. Our expert topic is feed and feeding practices for Catfish in India by B. Laxmappa, Fisheries Development Officer, Department of Fisheries, India.  

Catfishes are the second major group of freshwater fishes. India, being a mega-diverse country, harbors 197 species of catfish. Catfishes, owing to their unique taste, are considered a delicacy for the fish consumers, but production of different indigenous catfishes through aquaculture is unexplored in India, although aquaculture contribution of some of the catfish varieties like Ictalurus, Silurus and Clarias spp. has been exemplary in the World scenario.

Together with our regular contributors and topical news reports and interviews, I am sure that our latest issue will give you much to read in these autumn months. I look forward to greeting you next in our January/February edition.

Read more in the new edition HERE
(Published in IAF1406 - Nov/Dec 2014)

The Aquaculturists
This blog is maintained by The Aquaculturists staff and is supported by the
magazine International Aquafeed which is published by
Perendale Publishers Ltd

For additional daily news from aquaculture around the world: aquaculture-news

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