High-temperature aquaculture feed management
2025-08-15 03:22:53
In high-temperature conditions, both pathogens and aquaculture species are affected, but the impact on aquatic organisms can be negative. When water temperatures exceed 33°C, many aquatic species lose their appetite and experience slower growth. This makes proper fish management in intensive pond systems crucial for maintaining productivity and health.
First, it's essential to use fresh feed. Avoid spoiled or rotten food, and opt for fresh ingredients like small fish and shrimp. To ensure feed hygiene, you can soak the food in chlorine dioxide (0.3 ppm) or potassium permanganate (15 ppm) for disinfection before feeding. This helps reduce the risk of disease outbreaks caused by contaminated feed.
Second, timing is key when it comes to feeding. It's best to feed twice a day, with the main feeding occurring at night. In the morning and evening, divide the feed into three or seven portions to ensure that the animals consume it efficiently and minimize waste. High temperatures cause feed to spoil quickly, and daytime feeding may not be as effective due to reduced appetite. To stimulate feeding during hot periods, consider an afternoon water intake method, which can help improve appetite and digestion.
Third, controlling the amount of feed is important. Feed in moderation, ensuring that all the food is consumed within 1 to 2 hours after feeding. If the food is still present after 2 hours, it’s a sign that you should reduce the portion size. Overfeeding not only leads to wasted feed but also negatively affects water quality, increasing the risk of pollution and disease.
In general, summer water temperatures often hover around 30°C, and despite the heat, fish and shrimp continue to grow at a relatively fast rate. Proper feeding during this period is essential for maximizing yield. Penaeus vannamei, a tropical species, thrives in warmer waters and reaches its peak growth at around 33°C. Therefore, it's important to provide sufficient feed and maintain good feeding practices. Before each feeding session, you can enhance the appetite of the cultured species by stimulating them one hour prior, ensuring they are ready to eat and absorb nutrients effectively.
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