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Fish feed and nutrition
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A university and a non-GMO soybean company have developed a sustainable alternative for farmed fish feeding.
The creators of this product claim that it provides a sustainable source of farmed fish feed and, at the same time, reduces animal dung toxicity, decreases predatory fishery, helps fresh water saving and also carbon gas absorbing. This product is an oil extracted from seaweed developed by partnership involving Imcopa and Furg (Rio Grande...
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In a bid to address the global economic crisis, fishery officials in the Cagayan Valley region have introduced cost-reduction and productivity enhancement technologies.
Recognizing how fish farmers are burdened by high- input costs, particularly feeds, the Bureau of Fisheries and Aquatic Resources (BFAR) has included in its plans for 2009, the widespread promotion of duckweeds as supplemental feed for tilapia, bangus, pangasius and carp.
Duckweeds are small flowering plants...
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U.S. Grains Council recognized an opportunity to increase the utilization of distiller's dried grains with solubles (DDGS), a co-product of U.S. ethanol production, in the rapidly growing fish farming (aquaculture) industry. According to Dr. Budi Tangendjaja, USGC consultant in Southeast Asia, aquaculture is one of the fastest growing food producing industries in the world. The Council embarked on an initiative to test DDGS as a potential ingredient for feeding fish in...
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With the spawning season over for the year, it's a good time to evaluate baitfish fry survival and growth. Hopefully it's been a good year and you have ponds full of new fish. If not, you may want to consider some pond management changes.
What's a normal survival rate? In a study conducted in UAPB research ponds, survival from matted egg to juvenile size (called "peewee", weighing 0.5-2 lb/1000 fish) ranged from 9 percent to 47 percent and averaged 24 percent. The losses took place...
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Fish oil replacements for farmed fish feeds may help reduce the aquaculture industry's dependence on wild fisheries for their essential omega-3 requirements. This move may also help overcome existing barriers that impede the industry's expansion.
A study published in the inaugural issue of Reviews in Aquaculture by Wiley-Blackwell provides a review and discussion of research activities conducted to evaluate alternative lipid sources. It focuses on the effects of fish oil replacement...
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An unlikely alliance between two former Colorado School of Mines students and the New Belgium Brewery in Fort Collins could someday end up saving fisheries all over the world.
At least that's the vision of a handful of entrepreneurs working in a sludge treatment warehouse about a quarter mile in back of the famous brewery.
Andy Logan, who has a PhD in water treatment, explains that fisheries around the world are in a state of collapse.
Even replacing dying fisheries...
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Abalone need to watch their diets to be healthy, according to a collaboration between Moss Landing Marine Laboratories and the Monterey Abalone Co.
The mollusks - which can be thought of as giant, flattened snails - eat kelp, but to be really healthy they need to eat small amounts of red seaweed as well, said Thew Suskiewicz, a master's candidate at the Marine Lab and a seaweed cultivation expert for the Monterey Abalone Co.
"They're getting lots of...
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Factors such as nutrition, water temperature and rapid growth play a key role in bone development of Atlantic salmon. Novel research shows that the naturally occurring level of vitamin K present in fish feed given to Atlantic salmon juveniles is sufficient for good growth and bone health from the start of feeding until smoltification.
Norway produced more than 700 000 tons of salmon in 2007. The development of bone deformities presents a challenge to the aquaculture...
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Fishmeal is recognized by nutritionists as a high-quality, very digestible feed ingredient that is favored for addition to the diet of most farm animals, especially fish and shrimp. Fishmeal carries large quantities of energy per unit weight and is an excellent source of protein, lipids (oils), minerals, and vitamins; there is very little carbohydrate in fishmeal. What Is Fishmeal Fishmeal is a generic term for a nutrient-rich feed...
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Tilapia fishes were found tastier when these are given natural food than commercial fish feeds.
This was the contention of fishery officials in Cagayan Valley as they spearheaded a recent training on 45-day delayed feeding technology.
Hermogenes Tambalque III, extension chief of the Bureau of Fisheries and Aquatic Resources, said this new technology aims to cut expenses of fishpond operators on commercial feeds, which, according to studies, account for as much as 70...
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Commercial catfish feed comes in a variety of pellet sizes--floating or sinking pellets--and a variety of crude protein levels. The two most common levels are 28 percent and 32 percent crude protein. Farmers choose a particular formulation based upon growth and profitability. Of course, there has been considerable debate on which protein level leads to maximum growth.
Why would it be desirable to limit the total crude protein in practical diets? There are three nutrient groups that...
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Le Gouessant fish feed range from trimmings certified Friend of the Sea, with more to come from approved sustainable fisheries.
Friend of the Sea certified aquaculture companies will soon have to source only from certified fish feed to prove their sustainability to the consumers. Friend of the Sea is providing a practical answer to the yearly discussion between pressure groups, NGOs and the aquaculture and fish feed industry, about the sustainability of...
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Access to marine raw materials for fish feed production is limited. Any future increase in the numbers of farmed salmon will therefore necessitate an increased use of feeds of plant origin. If salmon are to grow satisfactorily and remain healthy, it is important to obtain knowledge of just how plant-based feed affects the health of fish. For his doctorate, Einar Lilleeng studied how plant ingredients in fish feeds affect the health and immune defence of fish. It is important to...
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With the aquaculture industry dependent on fish-based feed, a researcher has come up with a formula that uses poultry by-products and vegetable oils. Dr Rossita Shapawi said the industry currently relied on trash fish, which is defined as fish with little or no commercial value. "Trash fish is not sustainable for the long term and so we have to use artificial feed, but we don't produce quality feed. The imported feed is also expensive," said Rossita, who is with...
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Mathieu Castex Awarded Young Researcher of the Year during New Caledonia « Doctoriales » for his work on Probiotic Application in Aquaculture. Mathieu Castex, a final year PhD student at IFREMER (French Research Institute for Exploitation of the Sea) in Nouméa, New-Caledonia, was awarded Young Researcher of the Year during New- Caledonia « Doctoriales 2008 ». The subject of his research project, conducted in partnership with Lallemand Animal Nutrition, is the evaluation of...
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For the first time, a study has examined how feeding Atlantic salmon high levels of both plant proteins and vegetable oils would affect the fish. This experiment resulted in two kilos of salmon protein generated per kilo of fish meal protein in the feed. The study showed a slight reduction in salmon growth, even though all known nutrient requirements of the fish were covered by the feed. In a study carried out by the National Institute of Nutrition and Seafood Research (NIFES), salmon...
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The reduction in the use of fish oils in aquaculture diets has been recognised as an important issue to resolve for the aquaculture industry. In Western Australia, our production of canola and canola oil provides us with a potential alternative to fish oil. Of the available alternatives to fish oil, canola oil is one of the more promising candidates. It has higher omega-3 (n-3) levels than most other candidates and is readily accepted by fish in the studies that we have conducted....
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Grouper farming, especially in Southeast Asia, is still heavily dependent on feeding with trash fish. The demand for trash fish is increasing steadily despite decreasing prey fish stocks in the world’s oceans and competing use for human consumption (Tacon et al., 2006). In order to sustain the rapidly expanding marine fish farming industry in Southeast Asia, more farmers are using commercial formulated feeds in the aquaculture of captive groupers. Currently available commercial feeds for...
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Western Australia is the world's largest producer of lupins. The narrow-leaf sweet lupin, Lupinus angustifolius, is the main species of lupin grown, though other varieties such as the yellow lupin (L. luteus) and white lupin (L. albus) are also grown. Each of the lupin species differ subtly in their composition (see composition table). The removal of the seed coat to produce a kernel also alters the composition of the resultant kernel meal, which has considerable advantages over...
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800 000 salmon produced at CAC yielded more fish protein than was used to produce their feed, without reducing the omega-3 level in the fish flesh. Commercial salmon farming can be a net fish protein producer. This is proved by recent research findings from CAC in Norway. The results show that limits in the supply of marine raw materials do not need to frustrate future growth in the aquaculture industry, and that salmon farming can produce more fish protein than comes from the...
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