The growth characteristics of shrimp and crab animals have jumping characteristics,and only after molting can their growth change.Adding shrimp and crab growth promoting hormone,also known as ecdysterone,to feed can make shrimp and crabs molt immediately,accelerate the molting process,improve the survival rate and synchronization of molting,and achieve the goal of rapid growth.
1、Shelling and Growth
The growth of shrimp must rely on shelling:the growth rate of South American white shrimp=shelling rate×Growth and weight gain rate.The shelling rate is related to the growth stage of shrimp and water quality environmental factors.
When the environment is suitable,shrimp fry should be shelled once every 30-40 hours,and larvae weighing 1-5 grams should be shelled once every 4-6 days.Prawns weighing more than 15 grams are generally shelled once every two weeks,mostly in the first half of the night around the first and fifteenth days of the lunar new year,between spring and neap tides;When the weather suddenly changes,it usually occurs before dawn.The shell hardens in 1-2 days.
The normal dehulling frequency at low salt and appropriate temperature can also increase the growth rate.The feed nutrition of shrimp can be shelled frequently,which shortens the breeding cycle for healthy growth of shrimp.
2、The main functions of ecdysterone
1.It can timely shell shrimp and crabs,significantly accelerate their growth,and improve feed returns.
2.Promote the shelling and allergenicity of shrimp and crabs,and improve the product specifications and grades.
3.Effectively eliminate harmful parasites from shrimp and crab crustaceans,improve disease resistance,promote metabolism and protein synthesis in the body,and enhance stress resistance.
4.It has high thermal stability and the effective ingredients will not change or lose during the granulation process of formula feed.
Explanation:The potential efficacy and applications mentioned in this article are all from publicly available literature.
Post time: Aug-08-2023