In the context of climate change developments increasingly complex, the active protection of the pond and aquatic become a top priority. Good management in the rainy season does not only help reduce the risks, but also ensure to maintain productivity and economic efficiency help the pet to “stand firm” before the storm.
The risk of unpredictable from rain storm
In the rainy season, due to the vagaries of temperature, humidity, precipitation... is the cause, directly or indirectly for the microorganisms that cause disease development and spread, at the same time triggers the phenomenon of “environmental shock” for aquatic pathogens have many opportunities to penetrate into the body of animals to cause disease. When there is the exchange of water between the natural waters and aquatic animal rearing areas due to human or flood is the cause spread many diseases fish feed, shrimp feed, causing damage to the rainy season.
In addition, rain and storms can destroy the process of farming, the shore of the pond, cage, sign, sure,... lost a pet cause economic damage.
So need to do to protect the fisheries in the rainy season?
This is the big question for farmers right from the early days of development, Vietnam's seafood industry. To ensure productivity, minimize negative impact from rain storm. Many measures to help farmers protect men fisheries pass the rainy season is recommended as follows:
Preparation before the rain storm
- Check out and reinforced the entire system, and cage wire anchor bearing. If conditions permit, the need to move the cage to the enclosed area to the wind.
- With respect to the object feed has reached sizes, commercial need to conduct emergency harvesting to minimize the risk of losing white.
- With the pond, need to check, reinforced back the shore of the pond guaranteed; dredge, unfreeze the drain, trench, channel, ditch ensure drainage.
- Relocate the equipment and machinery such as pumps, aeration, power generators up high positions, have shield to avoid damage due to flooding.
- Continuous monitoring the weather situation to capture the happenings of the storm every hour.
During and after rain storms occur
- Monitor the feed of fisheries, reducing export food to avoid excess much food contaminate ponds, reducing dissolved oxygen and increased toxic gases from the process of organic matter decomposition under the bottom of the pond.
- Vitamin supplements and minerals to increase resistance for aquatic
- Not for food at it's raining, because at this time the environment in the pond are disturbed. The sudden change of pH, temperature and dissolved oxygen reduces the ability to catch the bait by fisheries. Need to quickly discharge less water on the floor surface to reduce the amount of rain water in the pond; running machine fan water aeration to stabilize the pond environment. Check the index environment, then feed, reduced by 30 – 50% of normal food intake. Especially not feeding at night in the rain because of the amount of dissolved oxygen in water is very low.
- When prolonged heavy rain, the pH is reduced abruptly should liming around the shore of the pond; combined liming for ponds, ponds to stabilize water pH
- When stop the rain, the temperature of the water increased, the organic matter decomposes easy to make seafood poisoning, need to use products such as Yucca, Zeolite... to liberate toxic gas in the pond. Use of chemicals such as Iodine.... to kill bacteria in pond, then the use of probiotics to improve the environment
- Besides, stormy weather, high humidity, very easy to damage, mold, food, therefore should pay attention well preserved food, a thorough check before feeding, absolutely not for food use moldy, discolored, food has strange smell.
*Keep track of how often notifications happenings water flood on the river and rain storm on the news media to take measures to protect and aquaculture in an efficient manner.
In summary, taking the initiative to respond to the risk of rain and storms is the key element ensuring the productivity and economic efficiency. To closely monitor the situation rainstorms, health status, ponds, and water quality in ponds for the project handled promptly and minimize the risk of damage.
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