Whiteleg Shrimp — Stress from Sudden Weather Changes

2026-06-05

I. Introduction to the Problem:

Under the influence of adverse weather conditions such as cold waves, dense fog, typhoons, and heavy rainfall, shrimp exhibit a series of stress responses.

When the temperature drops suddenly (with a temperature difference of 6°C or more), it can lead to reduced feed intake and diminished vitality in shrimp. Conversely, a rapid temperature rise may trigger mass molting; if proper health‑management measures are not implemented during periods of thermal fluctuation, issues such as incomplete molting, soft shells, and unexplained mortality can arise.

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II. Root Cause Analysis

Intense cold air, the collision of southerly and northerly winds (southerly during the day and northerly at night), warm, moist air masses, and sudden autumnal temperature spikes can all trigger abrupt changes in water temperature, leading to shifts in algal communities or water-quality parameters. When these changes exceed the physiological regulatory limits of shrimp, they elicit a cascade of stress responses.

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III. Approach to Handling

Remove hydrogen sulfide, improve the bottom substrate, and eliminate oxygen‑consuming factors.
Enhance physical fitness and improve the body’s stress resistance.

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IV. Handling Plan

Before and after the sudden change in weather, use Polysaccharide-Active Ionic Calcium 50–80 mu per meter;

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Before the weather suddenly changes, use Powerful bottom-conditioning decomposition 2–3 mu/kg;
After the weather took a sudden turn, Life essence (2–4 bags of material) + Multivitamin for Aquaculture (2–4 bags of feed), mix continuously for 5–7 days.

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