What Water Depth Is Suitable for Shrimp Farming? Key Points for Controlling Water Hardness and pH
AbstractThe suitable water depth for shrimp farming is 0.9-1.5 m, the suitable pH range for shrimp growth is 7.7-8.8, the suitable hardness of shrimp-farming water is above 250 mg/L, and the suitable total alkalinity is above 80; if it is below 80 or above 400, corresponding measures must be taken.
I. What Water Depth Is Suitable for Shrimp Farming
In general, the suitable water depth for shrimp farming is 0.9-1.5 m, the suitable pH range for shrimp growth is 7.7-8.8, the suitable hardness of shrimp-farming water is above 250 mg/L, and the suitable total alkalinity is above 80; if it is below 80 or above 400, measures must be taken.
II. The Growth Environment of Shrimp
1. Shrimp swim differently from fish. A fish can swim forward just by swinging its caudal fin, but a shrimp does not have a caudal fin like a fish; it has only 1 tail and many small legs. Shrimp are skilled swimmers and can use their legs to swim long distances. When swimming, those swimming legs paddle backward neatly and repeatedly like wooden oars, and the body is slowly driven forward.
2. When frightened, its abdomen flexes and extends nimbly, the tail paddles water downward and forward, and it can continuously leap backward at very high speed. Some shrimp are not good at swimming; lobsters spend most of their time crawling on the sand and stones on the seabed.
III. Classification of Shrimp
1. According to different sources of production, shrimp are mainly divided into two types: marine shrimp and freshwater shrimp. Marine shrimp are also called red shrimp and include lobsters and prawns, among which prawns taste better and are a top-grade food and a famous seafood product. The common European shrimp of the North Atlantic is about 8 cm long, gray or dark brown, with brown or pale red spots.
2. The northern prawn is distributed along the coast from North Carolina to Mexico and is 18 cm long; the young live in shallow bays and later enter deep sea, feeding on small animals and plants. The above two species, together with the brown groove shrimp and the pink groove shrimp, all have important economic value. Crangon franciscorum is a large shrimp of the Pacific. Freshwater shrimp such as the family Atyidae are mainly found in warm regions, some in brackish water, and some reach 20 cm in length.
3. Ataephyra desmarestii is 1.6-2.7 cm long and is mainly distributed in freshwater waters of Europe, North Africa, and the Near East, living in groups among aquatic plants. The California genus Syncaris is 2-5 cm long, and Palaemonias ganteri is half that length and is found only in Mammoth Cave in Kentucky; it is a famous freshwater large shrimp of North America.
4. The genus Xiphocaris is distributed in the freshwaters of the West Indies. The genus Macrobrachium or Palaemon is edible and mainly distributed in the tropics. The genus Alpheus can grow to 3.5 cm and uses its large chelae to stun prey. The snapping shrimp of the Red Sea lives in the same burrow as gobies, and the fish signals danger to the shrimp through body movements.
5. The tropical Stenopus hispidus is 3.5 cm long. Coral fish swim backward past its chelae, and the shrimp cleans debris from their scales for them. The fairy shrimp resembles a shrimp in body shape but belongs to Anostraca. The transparent ones are young shrimp that have just grown larger.
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