6 Cautions for High Temperature Fishing
Production practice has proved that the fishing of adult fish in the high temperature season should be carried out at night or in the early morning (before dawn), when the temperature is relatively low, which is conducive to the preservation of fish. When fishing, you should pay attention to the following points:
1. If fishing with dragnet, make preparations during the day to clean up the sundries that hinder trawling on the surface of the fishing pond.
two。 If a soft vinylon fishing net is used, the height of the net should be consistent with the depth of the fishing pond as far as possible. If you use nylon net to catch adult fish in fish ponds with larger water surface, the mesh should be about 8 centimeters, so that most of the fish caught are more than 500 grams.
3. If the fishing round is released, only 10% to 15% of the total fish can be caught at a time, and all the fish in the pond cannot be caught in one net. Generally about 15 days purse seine, the interval between the two fishing should not be too short, so as not to affect the normal growth of fish. It should be noted that every year from June to October, is the peak growing season of fish, when the fish scales are loose, salvage should be extra careful to avoid fish injury, causing bacterial infection, at the same time should be injected with new water after fishing.
4. Do not feed the day before fishing, do not rush to draw the net when you encounter the floating head of the fish, immediately add new water and increase the dissolved oxygen in the water, and then pull the net when the fish do not float. Otherwise, it is easy to cause floodpond.
5. After the fish put up the net, first put it on the dewy grass and spread out for air, wait for the fish to cool before putting it into the fish basket or plastic bag. If it is bagged (basket) immediately after lifting the net, it is not conducive to the preservation of fish.
6. The fertilizer pond without new water can be sprinkled with quicklime and water before pulling the net; 8 kg ~ 10 kg per mu of water surface. Or sprinkle and disinfect it with bleach and water (1 gram of bleach per cubic meter of water) after pulling the net.
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Types and usage of commonly used pond cleaning drugs
Medicine cleaning pond is the use of drugs to kill pathogens, parasites and all kinds of ferocious fish, wild miscellaneous fish and other enemy organisms that harm fish, shrimp and crab seedlings in the pond, so as to avoid affecting the normal growth and development of farmed species due to diseases, so as to improve the efficiency of culture. At present, there are many kinds of clearing pond drugs, but different kinds of drugs have different effects. The commonly used pond cleaning drugs are quicklime, bleach, tea cake, ammonia, Croton, Tangkening and so on. First, quicklime clears the pond with quicklime, that is, calcium oxide, and its clearing function is that quicklime reacts with water to produce calcium hydroxide.
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Prevention and treatment of trauma in ornamental turtles
[etiology] in the process of capture and feeding, the carapace, skin, limbs, mouth and other parts of the tortoise were bruised, injured and crushed. [symptoms] Local redness and swelling, tissue necrosis, pus. [prevention and treatment] for fresh wounds, stop bleeding first, oppress with gauze, apply Yunnan Baiyao in severe cases, then clean the wound, then scrub with disinfectant (93% hydrogen peroxide, 0.5% potassium permanganate) to prevent infection, and large wounds should be sutured and bandaged. For the old and suppurative trauma, enlarge the wound and remove the pus and necrotic material from the wound.
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