Grouper Farming RAS
Groupers are mostly monandric protogynous hermaphrodites, i.e. they mature only as females and have the ability to change sex after sexual maturity. Some species of groupers grow about a kilogram per year and are generally adolescent until they reach three kilograms, when they become female. The largest males often control harems containing three to 15 females. Groupers often pair spawn, which enables large males to competitively exclude smaller males from reproducing. As such, if a small female grouper were to change sex before it could control a harem as a male, its fitness would decrease. If no male is available, the largest female that can increase fitness by changing sex will do so.
RAS Recirculating aquaculture system
Recirculating Aquaculture System (RAS) series of treatment processes is utilized to maintain water quality in intensive fish farming operations. These steps of Recirculating Aquaculture System (RAS) are often done in order or sometimes in tandem.
After leaving the vessel holding fish the water is first treated for solids before entering a biofilter to convert ammonia, next degassing and oxygenation occur, often followed by heating/cooling and sterilization. Each of these processes can be completed by using a variety of different methods and equipment, but regardless all must take place to ensure a healthy environment that maximizes fish growth and health.
Sand Filters Of Recirculating Aquaculture System (RAS):
|No.||Diameter ΦD (mm)||Port Size (inch)||Flow (m³/H)||Filtration Area(m2)||Sand Weight (kg)|
Drum Filters Of Recirculating Aquaculture System (RAS):
|No.||Flow (m³/H)||Influent caliber (mm)||Effluent caliber (mm)||Average power (KW)||Voltage||Filtering precision(μm)||Size (CM)|
Protein Skimmer Of Recirculating Aquaculture System (RAS):
|No.||Flow (m³/H)||Size (mm)|