Abstract: The invention discloses a method for improving immunity in shrimps, by administering an extract of cocoa rind to a shrimp body to improve immunity of the shrimp body. The extract of cocoa rind is obtained by extracting a dried sample of cocoa rind by an aqueous ethanol solution with a concentration of ethanol being 90-98%. The dried sample of cocoa rind has a water content of 2-5%.

Abstract: The invention discloses a method for improving immunity in shrimps, by administering an extract of cocoa rind to a shrimp body to improve immunity of the shrimp body. The extract of cocoa rind is obtained by extracting a dried sample of cocoa rind by an aqueous ethanol solution with a concentration of ethanol being 90-98%. The dried sample of cocoa rind has a water content of 2-5%.

Abstract: The invention discloses a method for improving immunity in shrimps, by administering a double-stranded RNA specific to tyrosine hydroxylase to a shrimp body to improve immunity of the shrimp body, wherein the double-stranded RNA is administered to the shrimp body by injection into the ventral sinus of the cephalothorax of the shrimp body.

Abstract: A method for producing a fermented aquaculture feed includes forming a powder mixture of soybean meal and earthworm meal, adding water to the powder mixture to form a first feed mixture, adding a culture of Bacillus subtilis to the first feed mixture to form a second feed mixture, and incubating the second feed mixture at a temperature of between about 20° C. and about 50° C. for a first time period to obtain a fermented feed mixture. The invention further provides a fermented feed mixture obtained from adding a culture of Bacillus subtilis to a feed mixture and incubating the feed mixture at a temperature of between about 20° C. and about 50° C. The feed mixture is obtained from adding water to a powder mixture of soybean meal and earthworm meal. The weight of the soybean meal within the power mixture may be larger than the weight of the earthworm meal.

Abstract: A method of improving the reproductive performance of penaeus shrimps comprises a step of treating a fresh diet with sodium alginate and a step of feeding female penaeus shrimps with the treated fresh diet to enhance the breeding ability of female penaeus shrimps, also promote growth and survival of the subsequent larvae of the female penaeus shrimps.

Abstract: A method of improving the reproductive performance of penaeus shrimps comprises a step of treating a fresh diet with sodium alginate and a step of feeding female penaeus shrimps with the treated fresh diet to enhance the breeding ability of female penaeus shrimps, also promote growth and survival of the subsequent larvae of the female penaeus shrimps.