In Japan, analysis of substitution

In Japan, analysis of substitution of fish oil with vegetable oils could say no, even though almost all the needs of fish oil they import from Latin American Countries. They would concentrate on research directed to improve larval survival, growth, and quality of meat produced. Also, make eco-friendly fish feed ("eco-friendly diet"), for example to reduce the loading of phosphorus and ammonia from the fish to the water.
Agen bola agen99bet.com berhadiah samsung s4 tiap bulan depo 20rbAlthough the replacement of fish oil with vegetable oil to 50% does not affect the growth of fish, but the content of fatty acids EPA and DHA in fish body down drastically. It is caused because the sea fish can not mensintesa own EPA and DHA from C18 fatty acid that many contained by plants. Cultivation of fish have been known to have no or very low enzyme activity employed in Synthesis of EPA and DHA is fish side (turbot) elongase enzyme (Ghioni et al., 1999), and? 5-desaturase for snapper (gilthead sea bream ) (Mourente et al., 1993).
Salmon showed slightly greater ability in making use of vegetable oils. However, the content of EPA and DHA salmon also decreased when only given feed with vegetable oil and continuously. To restore the contents of EPA and DHA from fish fed with feed approach to fish oil, Bell et al., (2003) suggests that behavior "wash out", that is to replace the fed feed containing vegetable oils with fish oil containing a few months before the harvest is done. Substitution of fish oil with vegetable oils also have lower rates of dioxins and PCBs in salmon (Bell et al., 2004).
Other problems omega-3, amino acid content of vegetable powder is also not complete with fish meal rich in amino acids such as lysine and methionine. Vegetable proteins also could not be used properly by the fish. Thus, reliance on fish meal fish farming is still very high. Biotechnology applications that can enhance the ability of fish oil benefit / vegetable protein may be petrified reduce this dependency. This is a challenge for the bioteknologist to find the limiting factor in the metabolism of proteins involved in the digestion of vegetable feed.
2. Preserve carnivorous fish of more extravagant
Currently, one of the type of fish being cultured fish ideals set by the Ministry of Maritime Affairs and Fisheries (DKP) is grouper. Although the price is relatively expensive grouper compared to other ocean fish farming, but we know that these fish are carnivorous fishes grouper to date not yet tapped the artificial feed.
UBCPOKER.com Situs Judi Poker Online Terbaik TerpercayaAs a result, almost all developing regions grouper using trash fish feed raw form. Prices trash fish is still relatively cheap and easy to obtain. But besides its supply is in season, quality is also very varied. Trash fish can also be a source of illness that can be transmitted to fish farming.
With only provide fodder in the form of trash fish plus some vegetable protein sources such as soy, to produce grouper weighs 0.5 kg, it takes about 6 kg of trash fish. Can you imagine how much trash fish needed to meet the need for cultured grouper already digongkan by the DMF.