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New abalone hybrids could change aquaculture

PHILIPPINES - Scientists at the Southeast Asian Fisheries Development Center (SEAFDEC) Aquaculture Department have come up with new hybrid technology for abalone farming and produced two "presumptive" hybrids. These hybrids are able to grow faster than even the conventional donkey’s ear (Haliotis asinina), which is already one of the fastest-growing farmed abalone varieties. Donkey’s ear grows quickly, reaching a marketable size of 5 cm shell length in six months from an initial size of 2.6-3 cm.

The scientists have also managed to improve the taste of the fish. "The idea is to primarily improve the taste of the donkey’s ear abalone, as anecdotal reports mostly from fishermen and gatherers indicate that the smaller species of abalone native to Philippine waters have sweeter meat and is more crispy," said Mila de la Peña, Programme Leader of SEAFDEC’s Integrated Mollusc Programme, Malaya reports. The team employed conventional breeding techniques to cross the H. asinina female abalone with the H. glabra male and ended up with a hybrid they are calling HAFGM. The second hybrid is H. asinina female crossed with the H. planata male, or HAFPM. "We have produced presumptive hybrids, meaning they are presumed to be hybrids until they are confirmed to be real hybrids through genetic analysis," she explained. "It will be confirmed by the Centro de Biotecnologia, Universidad de Concepcion, in Chile, hopefully this year."

The team is comparing the growth rate and taste of the hybrids and verifying their performance in nature. "The result of cross-breeding will be tested in both land- and sea-based grow-out culture," she said. Thus far, the HAFGM hybrid has grown at a 10-20 per cent faster rate than the pure donkey’s ear abalone, while the HAFPM takes longer.

De la Peña’s research is now using biotechnology to boost abalone growth. SEAFDEC’s Dr Myrna B Teruel is also creating and testing a more nutritious microparticulate diet which can partially or fully replace the typical diatoms, or golden-brown microscopic algae used for growing post-larval abalone. Feeding this artificial microdiet could result in higher settlement and survival rates of the post-larval abalone and solve the problems of high mortality in hatchery production.

Last Updated on Sunday, 13 November 2011 13:57
 

Miyagi fishers suspicious of proposal to bring in outside companies

JAPAN - Miyagi Prefecture Governor Yoshihiro Murai believes that older and smaller-scale fishers will not be able to recover from last March’s earthquake and tsunami -- even with government help. Instead, he has proposed opening coastal waters to big-business investors. These waters are currently restricted to independent operators from Fisheries Cooperative Associations. The fishing cooperatives have responded negatively, arguing the move could push them out of the market. Many academics say that the proposed system would make coastal communities and ecosystems vulnerable to exploitation and abandonment.

Regardless, Murai has asked the central government to assign a special fishing zone where companies could fish with the same access to fishing licenses that cooperatives have, The Christian Science Monitor reports. Masahiro Yamao, a fisheries expert at Hiroshima University’s Graduate School of Biosphere Science, believes the Miyagi proposal is a test case for a larger reform of the fishing industry, which was already suffering from financial troubles and withering fish stocks.

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Shrimp exports to face stricter disease controls

THAILAND - Thai shrimp exports are facing tougher quality inspections by importing countries concerned about diseases arising from floods, says Panisuan Jamnarnwej, president of the Thai Frozen Foods Association. He said random quality inspections had increased fivefold for shipments to the United States, though exporters confirmed there have been no disease outbreaks. The association strictly monitors product quality. But frozen shrimp producers are worried that the worsening floods may affect the transport of carbon dioxide used in the freezing process.

It is shipped from Rayong to factories in the Mahachai area of Samut Sakhon. Some factories require up to three deliveries of carbon dioxide a day. Also threatening the frozen food industry are power outages that will force factories to use generators, which require fuel. "If fuel cannot be delivered to factories, the whole industry would be damaged," he said. Considering these obstacles, the industry expects exports will drop by 7% this year from 350,000 tonnes exported last year. Paiboon Ponsuwanna, president of the Thai National Shippers Council, said shipping via marine transport had dropped by 10-15% so far but would likely contract by 30% this year, following earlier projections of 20% growth.

This is because so many factories are inundated, particularly exporters shipping computer parts, integrated circuits, and automobile parts. Though some exporters are still manufacturing, many cannot bring their products to ports in time to meet shipping schedules. Normally exports are most active in the fourth quarter with holiday season orders, driving 15% average annual growth. "It's worrisome this year due to the flood. It will be difficult for Thailand to depend greatly on exports as in the past. The flooding impact will likely linger until the first quarter next year," said Mr Paiboon.

 

Tokyo distributor sells puffer fish without removing poisonous organs

JAPAN - A fish distributor in Tokyo has sold up to 14 puffer fish without removing their poisonous organs, prompting the Tokyo Metropolitan Government to alert consumers against eating them. Yoshiike, a fish and seafood distributor based in Ueno in Tokyo's Taito Ward, sold the poisonous puffer fish to consumers between Oct. 17 and Nov. 1, according to the Tokyo Metropolitan Government.

The distributor purchased and sold 3.6 kilograms of puffer fish on Oct. 17 and 4.7 kilograms on Oct. 18. The dealer further purchased 13.4 kilograms of puffer fish on Oct. 31 and sold as many as four of them by Nov. 1. The metropolitan government has yet to track down the buyers of the toxic fish. While the metropolitan ordinance bans the sale of unprocessed puffer fish to those without a chef's license, an official with Yoshiike has told the Taito Healthcare Center that the company "didn't know of the ordinance." The liver and other parts of puffer fish contain deadly poison, which causes difficulty in breathing and other symptoms when consumed by humans, in some cases leading to death.

 

Thailand to Import Chicken Eggs and Canned Fish

THAILAND - Thailand is importing food products, particularly chicken eggs and canned fish, from neighbouring markets to address the problem of food shortages due to the ongoing flood crisis, the country's worst floods, reports Thai News Agency (TNA). Thai Deputy Prime Minister Kittirat Na-Ranong said the move is in accordance with the Cabinet's resolution at its weekly meeting on Tuesday that all ministries speed up providing assistance to people affected by the country's vast inundations since late July.

Kittirat, who is also Commerce Minister concurrently, revealed that his ministry is first importing some seven million chicken eggs from Malaysia and Hong Kong this week and will be importing canned fish, at 400,000 cans weekly, as well as other basis food products. The Thai deputy premier said that the government will try the best to ensure that consumers in all areas will have sufficient access to the basic food items, and that water filters imported from China are also being installed at temporary shelters for flood victims and provincial halls to relieve shortages of clean drinking water.

 
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