Friday, March 8, 2019
Culture of Hybrid Stripped Bass in Cages
The crossbreed mark cryptical (Morone crysops saxatilis) is a cross between the stripy bass and the ashen bass. The two species were successfully hybridized for mercenary farming in 1967 in California. The aquamarine kitchen-gardening of this lean sight be conducted in either winnings pens or in open pocket billiardss. A drawback to open pond culture is that ponds essential be designed specifically for aquaculture, and in most cases they ar not. Usually ponds be designed with irrigation, irrigateshed conservation, livestock watering, or volunteer(a) purposes in mind. Theast southeast ponds usually cannot be adequately drained or they take in natural structures on their arses, which make harvest timeing difficult. However, with henho put on culture galore(postnominal) of these ponds can still be roled for aquaculture.Cages or net pens be structures that en finale a number of search in a res claim ara keeping them from ranging freely. This makes harvest extrem ely easy. The weight are swayback out of the cages or the cage itself is simply removed. Although the cage makes for a easier harvest the nature of the fish being in confined space calls for close management. Pond size is very important when considering cage culture for commercial purposes. Five acres is the recommended size for commercial culture (due to oxygen demand) although, smaller ponds can be used is mechanical aeration is used to offset the bother of oxygen depletion. Fish need oxygen to survive the oxygen they utter is dissolved in the water. The amount of dissolved oxygen in the water is inversely proportional to the water temperature. Warmer water means decline levels of oxygen saturation, which is where problems arise. As the water temperature increases so does the metamorphosis of the fish. This mettlesomeer metabolism causes the fishto consume more oxygen. If oxygen levels are low this stresses the fish, which in turn causes the fish to consume more oxygen an d further cut down levels in the pond. So for a cage culture operation to be successful a high lever of oxygen saturation essential be maintained. This can be done in two slipway using a small number of fish on a large pond, or enhancing the ponds oxygen levels by mechanical means. The latter is what plant life best in intensive commercial mails. Mechanical methods such as paddlewheels, airlift pumps, or diffusers are artificial means of introducing oxygen into a pond. They simply expose more water surface to the atmosphere abideing a greater rate of oxygen transfer. Oxygen is one of the major pass factors in determining how many pounds of fish can be produced in a given body of water. That is why in serious commercial cage culture a good oxygen meter is a valued piece of equipment.Keeping oxygen in mind, cages can be placed any where in the pond so long as there is enough open water around and under the cage to allow water to circulate. Cages should not be set side by side s o water movement is not restricted. The ideal situation is to have two cage lengths between cages. A minimum of two feet should be maintained between the bottom of the cage and the pond bottom to ensure an adequate buffer zone between the caged fish and the pond bottom, where organic waste is broken down by bacteria causing low levels of oxygen. For greatest ease in unraveling and harvesting it is suggested the cages be placed along a floating dock. Pond depth is some other factor in cage culture. The pond should be at least six to seven feet deep but no deeper than fifteen feet. Deeper ponds should be avoided due to water stratification. The cool water at the bottom go out establish a density gradient so that normal vagabond action will only circulate the upper level of cordially water. In dealing with water temperature hybrid scanty bass get water in the range of 72 to 78oF for optimal growth.With hybrid nude bass it takes sixteen to twenty-four months to reach market size . The first course is devoted to fingerling production and the second to market grow out. With hybrid striped bass there are two options with respect to size when stocking. You can stock strain I fingerlings or manikin II yearlings. The phase I fish are 2 to 3 inches long and to the highest degree two months old. There are several advantages to stocking phase I fish. They are cheaper and there fore can be stocked in high densities. Once they reach the age the excess phase II fish can be sold off keeping the grow out density near the ponds carrying capacity. The disadvantages of phase I fish are the use of small mesh cages restricting water flow, higher mortalities, and the need to train them to take feed. Phase II fish are 6 to 8 inches long and weigh about 1/3 of a pound. These fish are healthy accept feed and are unlikely to come across significant mortalities if oxygen levels are maintained. The draw back to these fish is that they are expensive. In an intensive commercial s ituation phase I fish prove to be the most profitable.The caged hybrid stripped bass are completely dependent on the farmer for fare due to them being confined in cages. There fore they must be feed daily with a high quality diet. The caged fish should be fed y hand to best manage them. eating by hand gives instant feedback on the health of the fish. Fish should be fed twice a day once in the dawning and once in the evening. Do not feed the fish later on dark for this is when oxygen levels are at their lowest. Be consistent in your feeding patterns for seclude changes can disrupt the behavior patterns of the fish. The feed should be of good quality the protein amount and food size depend on the fish size. The smaller the fish the smaller the feed and the higher protein subject area needed. There is not a complete diet food for hybrid striped bass instead you must use trout and salmon diets. delinquent to this the feed rate stays between 2 to 3 part body weight per day for po und fish decreasing as the fish reaches harvest size. Fish less than pound are feed 5 percent body weight per day. For loanblend striped bass the food conversion efficiency ranges from 1.8 to2.51.Hybrid stripped bass are fast attracting consumer interest in seafood markets around the country. The inland culture of Hybrid stripped bass is best undertaken in cages or net pens since it changes the use of most farm ponds with were previously thought useless foe aquaculture purposes. The cages enable the farmer to keep tight control over his fish and allow for easy feeding and harvest. With this type of culture market size fish pound to 2 pound and up fish can be achieved by the end of the second year.
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