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Talking about the shrimp stocking operation
The proper implementation of shrimp stocking techniques plays a crucial role in improving the survival rate and increasing the yield of green shrimp farming. Below are some key considerations for effectively applying these practices.
First, oxygenation must be carried out before stocking. During autumn, when shrimp seedlings are introduced, it is typically during the high-temperature season. Seedlings are often transported early in the morning, but this is also the time when pond water is most depleted of oxygen. If no prior aeration measures are taken, the seedlings may suffer from poor health or even die due to stress. To avoid this, it's essential to aerate the water before introducing the seedlings. The process includes flushing the pond for over two hours, adding an oxygen booster, and using an aerator to ensure sufficient oxygen levels. Shrimp should be observed to "fight water" in the tank before being released. It’s also recommended to use nets to gently transfer the seedlings, reducing shock and ensuring a smoother transition.
Second, it's important to improve the method of transporting live shrimp to reduce mortality caused by improper handling. Many farmers still use dry containers like baskets, basins, or buckets, which can lead to overcrowding and stress. In one case, a farmer in Nangang Township transported shrimps on a boat without proper water conditions, resulting in all the shrimps dying. This highlights the need for better transport methods. Ideally, live water boats or vessels equipped with aeration systems should be used. Even when using smaller containers, they should be smooth and not overloaded. This ensures the shrimps remain healthy during transit.
Third, oxygenation should be increased before the first stocking. In most monospecies shrimp ponds, farmers usually start fertilizing a week before stocking to encourage plankton and algae growth. However, these ponds often lack enough oxygen in the early morning. Adding oxygen at this stage helps the seedlings adapt more easily and recover faster after transportation. If other species like crabs are already present in the pond, timely aeration is even more critical. Methods include water flushing, using aerators, or applying oxygen enhancers.
In addition to the above, there are several other important points to consider: 1) Choose sunny days for buying seedlings, avoiding foggy or extremely hot weather. 2) Always select "head-up" seedlings from cages and avoid "settle seedlings." Ensure the size and quality are consistent. 3) When releasing the seedlings, stand in the water rather than on the shore to prevent them from sinking into the mud. 4) Be cautious about water temperature differences between the transport container and the pond. 5) Fertilize the pond properly and avoid leaving it clear or "white," as this can harm the seedlings.
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Talking about the shrimp stocking operation