Cathepsin enzymes, part 2
Cathepsin D alone and in combination with other cathepsins presents the greatest proteolytic activity on some fish muscles.
Chemical treatment costs reduced with in-pond raceway systems
By dividing ponds into smaller, more controllable areas, IPRS can substantially reduce chemical treatment costs, improve treatment delivery and allow new treatments that are cost-prohibitive in traditional pond settings.
Cathepsin enzymes, part 1
Cathepsins B, D and L are considered critical in fish muscle post-mortem modifications or gel softening during the setting of surimi.
Algae shows promise as alternative DHA source in rainbow trout diets
A growth trial in Canada evaluated the use of algae biomass to increase the concentration of long-chain polyunsaturated fatty acids in the tissues of rainbow trout.
Dietary sodium butyrate improves performance of Pacific white shrimp
Sodium butyrate has potential as an additive for marine shrimp diets, improving both the balance of intestinal bacterial flora and performance of the shrimp.
Do current shrimp practices favor EMS?
After refilling ponds, surviving microorganisms – including Vibrio parahaemolyticus, which causes EMS in shrimp – may benefit from the availability of nutrients in sediment and water and lack of competing microorganisms.
Market test: Farm-grown freshwater prawns
A small test market at a high-end grocery store near Washington, D.C., USA, showed that farm-grown freshwater prawns would sell to high-income consumers who had not previously tried the product.
Commercial, natural feed consumption examined in Amazon River prawn study
In a 60-day study, Amazon River prawn postlarvae stocked in pens within a culture pond were given commercial feed or received no feed beyond the natural organisms in the pond.
Diets for pond-raised red claw crayfish
Red claw crayfish have numerous attributes that make the species a good choice for aquaculture, including flexibility in feeding that may allow expensive prepared diets to be supplemented or replaced by natural foods or forages.
Feed management improves profits in intensive white shrimp farming
To ensure optimal water quality and clean pond bottoms at shrimp farms, choosing consistently good-quality feed and close monitoring of feed trays supported by a proven feeding guide are recommended practices to control the amount of feed applied to ponds.
A look at tilapia aquaculture in Ghana
Aquaculture in Ghana has overcome its historic fits and starts and is helping to narrow the gap between domestic seafood production and consumption. Production is based on Nile tilapia.
Developing live bacterial vaccines by selecting resistance to antibacterials
As wide use of antibiotics has led to antibiotic resistance in fish pathogens, vaccines present an alternative control method to prevent bacterial diseases.
Diffused-air system improves oxygen levels in sea cage culture
Traditional sea cage culture typically relies on natural water exchange to replace oxygen consumed by fish, which may not provide sufficient oxygen – especially during seasonal periods of high temperature.
Clove oil, eugenol effective anesthetics for silver catfish
Clove oil and eugenol have been recommended and used as anesthetics for several fish species. Moreover, these products have received the attention of researchers because of their chemo-preventive effects, as well as their anti-inflammatory and antioxidant properties.
Field diagnostic tools for pathogenic vibrios
Since Vibrio samples often degrade during transport, the authors analyzed nucleic acids (FTA) cards as a simplified, shelf-stable collection method for the preservation of genetic material from water samples.
Red seaweed: Promising, sustainable feed additive combats ISA virus
In a study, Atlantic salmon fed diets with red seaweed had significantly higher levels of antiviral activity against the infectious salmon anemia virus than fish fed a control diet.