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Aquaculture breeding and genetics
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Many strides have been made in the catfish industry during the last several decades. The industry has progressed from the days of collecting brood fish from local streams and rivers, placing those fish in brood ponds or pens and allowing the fish to spawn, to the recent development of selected lines of fish with improved growth and disease resistance. Even with the genetic improvements in brood stock, spawning success is often quite low. On average, only 50 percent of females actually...
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A man-sized grouper that trolls the tropical waters of the Eastern Pacific Ocean for octopuses and crabs has been identified as a new fish species after genetic tests. Called the goliath grouper, the fish can grow to six feet (1.8 meters) in length and weigh a whopping 1,000 pounds (454 kg). Until now, scientists had grouped this species with an identical looking fish (also called the goliath grouper, or Epinephelus itajara ) living in the Atlantic Ocean. "For more...
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Cargill, an American commodity trading giant, expects its new shrimp hatchery business for aquaculture in Pahang to start operation by year-end. Cargill Asia Pacific president/regional director Paul Conway today said the business was Cargill's first in the world, with an initial investment of RM5 million. Elaborating further, Cargill Feed Sdn Bhd managing director Desmond Tham Yuk Sun said there is a niche for Cargill to provide SPF (Specific Pathogen Free) to the shrimp farmers...
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ARS genomics research has been instrumental in identifying economically significant genes not only in livestock, but also in fish. Scientists Caird Rexroad and Yniv Palti, at the National Center for Cool and Cold Water Aquaculture in Leetown, West Virginia, have developed tools for rainbow trout genome research. This includes construction of a genetic map that is being integrated with a physical map to facilitate alignment of the trout genome with the sequenced genomes of model...
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When competitors are around, male Atlantic mollies try to hide their top mate choice, reveals a new study published online on July 31st in Current Biology, a Cell Press journal. They feign disinterest in females after onlookers enter the scene. What's more, after encountering a rival, the tricky males direct their first sexual advances toward females that really aren't their first pick. Male mollies are known to copy other males' mate choices, the researchers noted. " I find...
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Decreasing pH the biggest threat to marine animal life for thousands of years. By absorbing carbon dioxide from the atmosphere, and from the human use of fossil fuels, the world's seas function as a giant buffer for the Earth's life support system. The chemical balance of the sea has long been regarded as immovable. Today, researchers know that the pH of the sea's surface water has gone down by 0.1, or 25 percent, just since the beginning of industrialisation just over a century...
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Now that the spawning season is approaching, how did your hatching go last year? Did you obtain satisfactory hatching rates? If not, it would be good to consider making some changes in the hatchery. Disinfecting eggs daily to improve hatch by reducing fungus and bacterial infections is a recommended practice. Research has shown that a number of compounds are effective disinfectants, but farmers are restricted to those chemicals in the FDA approved or “low regulatory priority” categories:...
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Diners in Singapore can soon try out a new breed of locally-farmed fish. Cobia, a long slim marine fish found in the region, is being harvested for the first time by a fish farm here for local consumption. The oily white-fleshed fish, with brownish grey back and silvery stripes on its side, is 'less fishy' in taste than the popular snakehead. It will first be introduced to restaurants at 'a promotional rate.' Currently, the fish is flown in frozen from...
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The world’s fastest growing abalone—the tropical donkey’s ear abalone, Haliotis asinina—can be bred to grow rapidly and reliably for aquaculture, Queensland biologists have found. And that makes it potentially a high value alternative crop for struggling prawn farmers. The researchers looked at whether they could speed up breeding of abalone for aquaculture using modern technology to identify and select genes that are activated in fast-growing animals. By linking the abundance of...
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Fishery researchers in Thailand plan to adopt an RFID-enabled system to track the broodstock – the fish kept isolated for breeding purposes – of several fish species key to the country’s export business. With the system, researchers can track the development of the broodstock and supervise crossbreeding programs to improve the species. Researchers at the Department of Fisheries Science at King Mongkut's Institute of Technology Lad-krabang are embedding RFID chips in three aquatic...
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Seeing the rapid decline of Bluefin tuna, scientists have used a special speargun to implant hormones into the fish in sea-cages off the coast of Italy, thus making the species spawn and grow in large numbers. Bluefin tuna are among the most expensive fish on the planet, with just one selling for more than 100,000 dollars in Tokyo, where it is highly prized by top sushi chefs. But the taste for this luxury tuna in Japan has decimated global bluefin populations. Now,...
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World-first breeding techniques pioneered by Clean Seas Tuna Limited to artificially reproduce Southern Bluefin Tuna have been successfully replicated in Europe. European research consortium Allotuna has reported productive spawning of Atlantic Bluefin Tuna – the SBT’s northern cousin – using the same strategy conceived by Port Lincoln-based Clean Seas earlier this year. Allotuna’s international research team which includes Dr Dinos Mylanos and Prof Chris Bridges – both members of...
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On Monday 23rd June, 2008 GPIC released the 15th batch of sea-breams at a ceremony attended by HE Mr. Jimmy Bowden, UK Ambassador to the Kingdom of Bahrain, members of the executive management and students from the local government schools. The event was opened by a speech in which Mr. Abdul Rahman Jawahery, GPIC General Manager expressed his thanks and appreciation to the Chairman of the Public Authority for Protection of Marine Wealth, Environment and Wildlife HH Shaikh Abdulla bin...
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World Register of Marine Species inaugurated with first 122,500 validated names; over 56,000 aliases for ocean species identified. Census of Marine Life-affiliated scientists consolidating world databases of ocean organisms have demoted to alias status almost one-third of all names culled from 34 regional and highly specialized inventories. The new World Register of Marine Species (www.marinespecies.org) contains about 122,500 validated marine species names (experts...
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Commercial fish farmers want the Government to allow importation of genetically-modified (GM) tilapia stocks to counter the dwindling fish population in local waters. Tugumisirize Digo, a fish farmer with Sunfish Farms in Wakiso, said many foreign companies had GM tilapia from Lake Victoria and were profiting from the trade. "The Philippines are benefiting from tilapia got from Uganda, yet our government is making it difficult for us to access these technologies," ...
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Two fish species, the Dusky Spinefoot and the tiny Dalmatian Blenny, have been added to the list of fish recorded in Maltese waters. Small numbers of the Dusky Spinefoot, Siganus luridus, were noted in different occasions at Delimara, feeding on bottom algae a few metres from shore. Both species were recorded by Mark-Anthony Falzon who has been researching fish in inshore Maltese waters since 1995. In June last year, a specimen was also spotted at a fishmonger's stall at...
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Aquaculture experts Global Hi-Q Bio-Tech (M) Sdn Bhd has successfully embarked on its much-anticipated multi-million ringgit venture to breed high quality tiger grouper fish in an indoor farm on Pangkor Island, Perak. The venture, which materialised from a partnership between the local firm and its Taiwanese parent company Hi-Q Bio-Tech International (Taiwan) Ltd two years ago, has now entered into Phase Two with the recent completion of its RM13mil nursery in Teluk Dalam. Hi-Q...
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A delivery of eggs to South Africa and a first time supply of smolts to Denmark are the most recent additions to a growing list of countries into which Landcatch Ltd., the Scotland and Chile-based salmon breeding company, is selling its pedigree strains of Atlantic salmon. “The continuing geographic expansion of Landcatch stock placement is welcome in terms of business as well as feedback on stock performance,” said Alan Stewart, Landcatch business development...
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A baby boom of sorts has wrapped up in Seward. Several million red king crab larvae hatched at the Alutiiq Pride Shellfish Hatchery. Twelve egg-bearing adult king crab collected from Bristol Bay last fall began releasing their larvae in mid-March. The hatch is part of a research program, now in its second year, designed to help scientists and policy makers decide if large-scale hatcheries can be used to rebuild collapsed king crab populations in places like Kodiak and the Pribilof...
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With the help of genetics, Ohio fish farmers will be able to raise the crème de la crème of yellow perch -- the state’s No. 1 food fish -- with the potential to increase production efficiency up to 50 percent over current growth standards. Ohio State University aquaculturists with OSU South Centers at Piketon are analyzing the genetic traits of yellow perch lines then cross-breeding those exhibiting high-growth rates and little genetic similarities. After two years of research, data of...
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