What are the methods for collecting and cleaning fish worms?
How do you collect and clean fish worms?
When catching fish worms in the early morning, a worm net is usually used along the edges of nutrient-rich rivers and ditches and just below the water surface at pond edges, dragging it back and forth, and generally No. can be caught. When catching, the worm net should not sink too deep, and the movements should be light, quick, and nimble. If the movements are too rough, it is easy to stir up debris and scatter the fish worm colony. At the same time, observe the water color, wind direction, and water flow direction. Generally, there are more fish worms in leeward places downwind and downstream; where the water quality is seriously polluted and the water color is turbid and sauce-colored or black, there are fewer fish worms. In late autumn and winter, because the number of fish worms decreases, they are very rarely seen in many rivers and generally form dormant eggs or retreat into deep water to overwinter. At this time, catching fish worms mainly means collecting them from sewage pits and ponds. But at this time the fish worms do not float on the water surface as in summer, so a long-handled net bag must be extended into the middle and lower layers of the pit or pond, and fish worms are collected back and forth along circular or spiral routes. It is worth noting that it is best not to collect fish worms from intensively stocked fish ponds. Because artificially densely stocked fish ponds often contain large amounts of fish pathogenic bacteria, and taking fish worms back to feed ornamental fish often brings pathogenic bacteria into the aquaculture water body, causing infectious diseases.
For the fish worms that have been caught, it is best not to leave them in the net bag for a long time, and the quantity should not be too large, to prevent the fish worms at the bottom from dying of hypoxia and suffocation. Whether they are cladocerans or copepods, after being brought back they must be cleaned thoroughly before feeding to fish, so as to avoid introducing enemy organisms and pathogenic bacteria from natural water bodies into the aquaculture water body and polluting the water. The cleaning method is: immediately pour the collected fish worms into a large fish tank filled with clean water, then use a large mesh bag to scoop the fish worms into another fish tank filled with clean water, and repeat this 3 to 4 times, until all the sludge and turbid water mixed with the fish worms has been cleaned away, and the color of the fish worms has changed from the sauce-purple color when first collected to bright red; only then can they be used to feed ornamental fish. During the operation, when transferring the fish worms from one basin to another, at the beginning when the fish worms are too dense, a large mesh bag should be used; later, as the number of fish worms gradually decreases and they become cleaner, a small mesh bag can be used. When filtering and cleaning fish worms, pay attention to separating live fish worms from dead fish worms, that is, during cleaning pay attention to the layering phenomenon of live and dead fish worms, because the vast majority of live fish worms have strong floating ability, and they float and gather in the surface layer of the water, while dead fish worms settle at the bottom of the tank. During the first cleaning of fish worms, the two should be separated and cleaned separately. Newly dead fish worms have not yet spoiled and can be used to feed ordinary varieties of ornamental fish.
For the fish worms that have been caught, it is best not to leave them in the net bag for a long time, and the quantity should not be too large, to prevent the fish worms at the bottom from dying of hypoxia and suffocation. Whether they are cladocerans or copepods, after being brought back they must be cleaned thoroughly before feeding to fish, so as to avoid introducing enemy organisms and pathogenic bacteria from natural water bodies into the aquaculture water body and polluting the water. The cleaning method is: immediately pour the collected fish worms into a large fish tank filled with clean water, then use a large mesh bag to scoop the fish worms into another fish tank filled with clean water, and repeat this 3 to 4 times, until all the sludge and turbid water mixed with the fish worms has been cleaned away, and the color of the fish worms has changed from the sauce-purple color when first collected to bright red; only then can they be used to feed ornamental fish. During the operation, when transferring the fish worms from one basin to another, at the beginning when the fish worms are too dense, a large mesh bag should be used; later, as the number of fish worms gradually decreases and they become cleaner, a small mesh bag can be used. When filtering and cleaning fish worms, pay attention to separating live fish worms from dead fish worms, that is, during cleaning pay attention to the layering phenomenon of live and dead fish worms, because the vast majority of live fish worms have strong floating ability, and they float and gather in the surface layer of the water, while dead fish worms settle at the bottom of the tank. During the first cleaning of fish worms, the two should be separated and cleaned separately. Newly dead fish worms have not yet spoiled and can be used to feed ordinary varieties of ornamental fish.