and prospects Van Can Nhu, Huy Quang Nguyen, Thanh Luu Le, Mai Thien Tran, Patrick Sorgeloos, Kristof Dier- ckens, Helge Reinertsen, Elin Kjørsvik and Niels Svennevig
A review of the recent de- velopments in research and production of cobia, which have made Vietnam the 3rd largest producer of farmed co- bia in the world. Conservative estimations for the 2007 pro- duction for the Asian-Pacifi c region exceed 35,000 t, with remaining global production adding an additional 2000 t, while offi cial farm production registered by FAO is consider- ably lower. Estimated 2008 production in Vietnam was 1500 t, following the major production of PR China and Taiwan Province of China. This review reports on the various aspects of hatchery technology such as broodstock management, intensive and semi-intensive larval rear-
ing, fry transportation as well as small-scale grow-out in wooden raft cages and large- scale in Norwegian-style circular HDPE cages. Some of the prospects for accelerating future development of this species in aquaculture and challenges to be solved are also identifi ed.
Ploidy effects on hatchery survival, deformities, and per- formance in Atlantic salmon JF Taylor, AC Preston, D Guy and H Migaud The production of sterile triploid Atlantic salmon may help address the increasing pressure on the industry to reduce potential breeding between farmed escapees and wild fi sh. However, many pre- vious studies have observed poor performance at sea in triploid stocks. Therefore, two year classes of mixed sex fi sh were created to examine ploidy interactions on hatch- ery performance. Egg batches were divided in two at
fertilisation, with one group subjected to a hydrostatic pressure shock to induce tri- ploidy. Triploid rate was con- fi rmed at 100% in all groups. Survival to hatch did not dif- fer between ploidy. However, reduced survival was found to strongly correlate with gamete quality. During the hatchery phase ploidy signifi - cantly affected size at hatch, with diploids generally larger. Growth advantage of diploids was only maintained for 6 weeks post-fi rst feeding, with triploids generally out-grow- ing their diploid siblings by the end of the hatchery phase. Deformity prevalence in fi rst feeding stages was generally low (mean < 2%), with no overall effect of ploidy. Our fi ndings show that triploid salmon can perform as well if not better than their diploid siblings. The low incidence of deformity during the hatchery and freshwater phases is also a signifi cant improvement over previous reports.
Vietnam is the 3rd largest producer of cobia in the world
Subscribe Now!Fish Farmer News in brief Marine Harvest seek expansion MH seek larger slice of Norwegian fish pie
MARINE Harvest are currently at- tempting to have restrictions on their growth lifted. Under a law passed in 2005 no single company is allowed to own more than 25 per cent of all Norway’s fi sh farming licences and the seafood giant currently has some 22 per cent of the total, mean- ing its opportunities to expand are se- verely limited. As a result the company has fi led a complaint in a bid to have the restrictions on ownership relaxed.
Regulations ‘In our view, the present ownership regulations of the aquaculture indus- try are outdated. The regulations also, for all practical purposes, applies to one company only and thereby distort
industry. The present restrictions on ownership exclude Marine Harvest from participating in this consolidation process. We want to contribute actively in securing a sustainable devel- opment of this industry and, consequently, we would like to participate in this consolidation process. Therefore, we have fi led a complaint on today’s restrictions on ownership to ESA,’ says Marit Solberg, Managing Direc- tor.
Marit Solberg
competition. The Government’s strategy for a sustainable aquaculture industry and the on- going transition to production in larger zones could lead to a need for a consolidation of the
‘In our opinion,’ contin- ues Solberg, ‘the present regulations restrict a development of the industry towards larger entities which can secure a sustainable develop- ment of the industry. As a consequence, we have chosen to make use of our
right to present today’s regulations to ESA for evaluation, and we anticipate the Norwe- gian Government’s interest in modernising the regulations.’
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fax: 01253 778203 Ugandan aquaculture show
UGANDAN fi sh farmers are organising their 4th Annual Fish Farmers’ Symposium and Aquaculture Trade Fair in Kampala.
The event, scheduled for 12- 14 January 2010, is organised by Walimi Fish Farmers Co- operative Society and will ad- dress key issues affecting fi sh farming enterprises including production planning, fi sh feeds, adding value, marketing and current support services to private sector aquaculture. There is also an aquaculture trade fair where farmers will display state-of-the art aqua- culture production technol- ogy. A range of farmed fi sh products and locally available inputs will also be on sale. Optional one-day fi eld tours to various aquaculture-relat- ed establishments have also been organised.
Contact: The Secretary, WAFICOS, P. O. Box 6213, Kampala. Tel: +256 (0) 312- 265896. Email: wafi cos08@
yahoo.com
Fish Farmer November/December 2010 4
www.fishfarmer-magazine.com
Seabed sale possibility sets an interesting precedent
THE Crown Estate has ad- mitted the possibility of the sale of some of the seabed. Ownership of a range of dif- ferent locations and seabed types, some of which already include reclaimed land, is being sought by the Lerwick Port Authority. But the an- nouncement will have rami- fi cations beyond Shetland, as the negotiations effectively pave the way for commercial discussions with interested parties across the UK. ‘The Crown Estate has long had a general predisposition against the sale of seabed in the interests of integrated and effective seabed management and that remains the case. The policy does however allow for consideration of individual proposals for sales depend- ing upon the circumstances,’ announced the board. Mean- while Rob Hastings, director of the marine estate, said that: ‘Lerwick Port Authority has impressive development plans and has expressed inter- est in commercial negotia- tions for sale of seabed in a highly businesslike manner. The Crown Estate is able to consider sales in line with the policy and we look forward to continuing discussions.’ Although the estate has admitted the chance of concessions, many think the organisation should cede con- trol to more local authorites. ‘Ultimately I would like to see control of the seabed removed from the Crown Estate and given to the communities who rely on it,’ argued Northern Isles MP Alistair Carmichael.
Dialogue bears fruit for abalone
Legal challenge to Scottish salmon farms News in brief Angling body calls in the law
GLOBAL standards addressing the potential negative impacts of abalone farming on the environment and so- ciety were fi nalised on 14 October by the WWF-inspired Abalone Aquaculture Dialogue. The announcement fol- lows the recent completion of certifi cation standards for bivalves, pangasius and tilapia.
‘Given that the process we used to create the stand- ards was transparent and involved more than 100 peo- ple, including farmers and scientists from the world’s key abalone production countries, we now have the most credible abalone aquaculture standards in the marketplace,’ said Abalone Aquaculture Dialogue Steer- ing Committee member Vincent Encena of the South- east Asian Fisheries Development Center. The new standards seek to minimise the key impacts associated with abalone farming by, for example, re- quiring bio-secure quarantine for wild-to-farm trans- locations, and requiring evidence of compliance with a documented protocol for health surveillance and dis- ease response. Meanwhile standards for shrimp, trout, salmon, seriola and cobia are expected to be fi nalised by mid-2011, prompting WWF’s Jose Villalon to point out that the ambitious project was now ‘halfway home’.
THE Salmon & Trout Asso- ciation (S&TA) has engaged the services of the lawyer and campaigner, Guy Linley-Ad- ams, to argue his case to poli- ticians in Scotland, England and Europe; try to discourage investment in unsustainable aquaculture; push retailers to demand higher standards of the fi sh farmers; and raise media (and public) awareness of the problems caused by fi sh farming.
The priority targets for the organisation’s campaign will be to see the relocation of fi sh farm sites identifi ed in areas sensitive for wild fi sh and to remove all smolt cage units from river systems containing wild salmon populations. ‘I feel the industry is at a
crossroads. It can chose the path of unsustainable expan- sion, or it can recognise its failings, pull back from the brink and start to address the damage it has already caused,’ says Linley-Adams.
Guy Linley-Adams SalMar CEO resigns Abalone aquaculture: standards created AKVA barge into the Med
AKVA group has just deliv- ered the fi rst of several new feed barges for the sea bass and sea bream industry in the Mediterranean. The brand new Wavemaster AJ-150- MED is custom designed to meet specifi c market require- ments for the region, both in terms of size, features and price. The fi rst barge was delivered to Sürsan, a major player in the Turkish fi shing, feed and aquaculture industry. ‘We have supplied feeding technology throughout the Mediterranean for over 20 years now, and the timing was now right to customise our barge technology for this market as well’, says Chief
Marketing Offi cer, Trond Severinsen. ‘Our new com- pact AJ-150-MED feed barge design incorporates AKVA group’s high safety, qual- ity and design standards, while at the same time being very competitively priced in order to compete well against locally-made barges in this market. We are currently building feed barges at three different shipyards in the Mediterranean and two in the Baltic. It is quite encouraging to see that other fi sh farming industries are adopting the same technology and scale of economics that have made the salmon farming industry so successful,’ he concludes.
www.fishfarmer-magazine.com 5
SALMAR’S CEO Leif Inge Nordhammer has notifi ed the company’s board of directors of his intention to resign his position after 15 years. The board has accepted his decision ‘with regret’ and has now started the process of recruiting his replacement, while Nordhammer will continue to serve as CEO until his successor is in place. Commenting on the decision, Bjørn Flatgård, chair of SalMar’s board of directors, said: ‘Under Leif Inge Nordhammer’s leadership SalMar has grown from a regional fi sh farming enterprise to a leading interna- tional aquaculture group. An uncompromising focus on the health and welfare of the company’s fi sh stocks has been a cornerstone of this growth. Leif Inge has been at the forefront in ensuring that all SalMar’s employees live up to the company’s standards in this area every day. This commitment has produced solid results, both strategically and operationally. However, while deeply regretting Leif Inge’s decision to step down, we fully understand his desire to focus on other priorities.’
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Fish Farmer November/December 2010
News pages give an overview of the latest international news.
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Fish Farmer September/October 2011
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VOLUME 34
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JULY/AUGUST 2011
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SPECIAL AQUA NOR ISSUE PLUS • Pangasius • Wrasse • Oysters and more
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