Study seeks optimum probiotic dosing for fish fry
Authors tested a commercial probiotic designed to lower stress prior to and during fish transport. Treatment at 10 ppm produced highest survival and growth.
University of Miami experimental hatchery achieves record cobia spawns, fingerling production
Selective-breeding coupled with advances in maturation systems, nutrition and management led to natural cobia spawnings at the University of Miami Experimental Hatchery.
Trials advance low-salinity culture of cobia, pompano, other species
Collaborative research in Florida is developing technologies for rearing marine fish in low-cost, low-salinity recirculating systems. Spawning and larval production studies have led to the mass production of juveniles.
Indonesian methods achieve mass production of grouper seedstock
Researchers at the Gondol Research Institute for Mariculture in Indonesia have studied the artificial propagation of groupers since 1995. In 2001, GRIM began successfully producing grouper seedstock at commercial-scale levels.
Algae alternatives serve in larval rearing of sea bream
Sea bream fry are produced using the greenwater technique in which microalgae are added to larval-rearing tanks during the first 20 to 30 days after hatching.
SCP comparable to hydrogen peroxide as catfish egg disinfectant
In studies, sodium carbonate peroxyhydrate proved an effective alternative to formalin and hydrogen peroxide as a treatment for controlling fungal infections of catfish eggs and improving hatch rates.
Aquaculture genomics: Progress in identifying species genetics continues
The continued application of genome research to aquaculture will provide unprecedented accuracy for genetic selection of performance and production traits.
Roles of lipid-soluble vitamins during life cycle of marine fish larvae
Although researchers have studied the roles of lipid-soluble vitamins in larger fish, limited information exists on the functions and dietary requirements of these nutrients in marine fish larvae.
Ballan wrasse offer efficient, environmentally friendly sea lice control
The Ecofish project is developing the commercial rearing of Ballan wrasse and methods for use of the fish to control sea lice in cod and salmon cages.
Photoperiod regulation inhibits spawning, promotes growth in Atlantic cod
Research has shown that an extended photoperiod for Atlantic cod females leads to reduced gonadal growth, faster body growth and shorter grow-out production periods.
Fish, shrimp respond to pheromone-based feeding attractants
The chemical communicators pheromones can be used to induce increased feeding activity in a range of farmed species. Preliminary commercial testing with pheromone feeding stimulants sprayed onto the surface of water prior to feeding found better feed utilization in fish and better water quality. Pheromone applications also produced shrimp that were 30 percent larger than the control shrimp and had a significantly faster rate of growth.
Health management of barramundi
By combining husbandry practices aimed at stress reduction with better disease management higher barramundi survival rates will be the likely result.
Fish vaccination: Success with salmon expanding
Vaccination combined with good disease management can improve fish survival, improve feed conversion, reduce costs and secure predictable production.
Partial harvest-biofloc system promising for Pacific white shrimp
In a study in Indonesia, increases in efficiency in power use resulted from the combined application of biofloc technology and partial harvest.
Researchers overcoming learning curve for production of sea urchin seedstock
Cost-effective seedstock supply is needed for commercial production of sea urchins. Metamorphosis from free-swimming planktonic larvae to benthic grazers has presented a significant challenge.
Transgenic fish: Risks and benefits
Some transgenic fish – lines of “high-growth” tilapia, salmon and carp – are nearing the stage at which they could be considered for commercial production.