Freshwater prawn farming in Brazil
At present, Macrobrachium rosenbergii is the only shrimp species commercially farmed in Brazil. Most freshwater prawn farms are small, and prawn culture is often a secondary farming activity.
Manage pH cycles to maintain animal health
The ideal pH for most aquaculture species is between 6.0 and 8.5. Lower pH values may result in decreased growth and survival, and greater susceptibility to disease. pH typically is lowest in the early morning, increases during the afternoon and declines at night.
Economic analyses project rising returns for intensive biofloc shrimp systems
In trials raising larger juvenile shrimp than those used previously in indoor super-intensive recirculating raceway systems, the positive effects from increased stocking size, growth rate and survival resulted in a reduced crop duration time.
Korean researchers study protein levels, P:E ratios in olive flounder diets
The authors conducted research to determine the optimum dietary protein levels and protein:energy ratios for different age groups of olive flounders.
Ongoing Vietnam studies find vibrio with phage transmits EMS/AHPNS
In 2012, samples collected from 92 AHPNS-affected ponds in the Mekong Delta found a number of Vibrio isolates, with the majority V. parahaemolyticus.
EMS/AHPNS: Infectious disease caused by bacteria
The University of Arizona Aquaculture Pathology Laboratory identifies a unique strain of Vibrio bacteria as the causative agent for EMS/AHPNS.
Sea lice control: Perspectives from Chile
Sea lice are a significant threat to the Chilean salmon-farming industry. Chilean salmon farmers also understand that prevention and good management practices based on biosecurity measures are the best tools to minimize outbreaks of disease.
Environmental trigger for EMS/AHPNS identified in Agrobest shrimp ponds
In studies of early mortality syndrome/acute hepatopancreatic necrosis syndrome at an Agrobest shrimp farm in peninsular Malaysia, results indicated that the disease originated with infected postlarvae and quickly spread throughout the farm.
Shallow nursery system uses bioreactor concept for juvenile shrimp production
The authors tested the effects of sequencing autotrophic and heterotrophic dominance on water quality levels in a recirculating system raising shrimp. Culture tanks were inoculated with nitrifying bacteria, and chemoautotrophic dominance was maintained.
Portuguese research studies meagre production in earthen ponds
The meagre is a fast-growing fish species with good feed conversion that is a candidate for expanded aquaculture in the Mediterranean. The challenges of a lengthy adaption to captivity and susceptibility to external parasites are being addressed, and wild-caught broodstock now spawn regularly.
Essential oils enhance fillet composition of channel catfish
Lab studies with channel catfish and rainbow trout have found that phytogenic feed additives like essential oils can help improve weight gain, feed conversion and immunity to disease.
Synthetic products replace live artemia in shrimp larviculture
To meet demand and maintain the sustainability of the shrimp aquaculture industry, commercial synthetic artemia has been developed for use as a bio-secure replacement for live artemia in larviculture.
Brazil shrimp farm performs genetic selection for IMNV resistance, growth
The Queiroz Galvão Alimentos shrimp farm and hatchery in Brazil have been working with Concepto Azul to implement a disease-prevention and genetic-breeding program that addresses ongoing impacts from infectious myonecrosis virus (IMNV) and other pathogens.
Impacts of acute hepatopancreatic necrosis syndrome
Research continues in the global efforts to identify the cause of acute hepatopancreatic necrosis syndrome in farmed shrimp and find solutions to stop the major losses caused by its spread.
Hawaiian company breeds SPF black tiger shrimp for improved growth
Since 2001, Moana Technologies has worked toward providing domesticated, genetically improved and specific pathogen-free (SPF) black tiger shrimp to farmers in Asia. Based in Hawaii, USA, Moana built a breeding base on wild-caught broodstock from seven locations in Asia.
Biofloc technology reduces common off-flavors in channel catfish
In studies that used biofloc systems to culture channel catfish, culture tanks were susceptible to episodes of geosmin and 2-methylisoborneol and subsequent bioaccumulation of off-flavors in catfish flesh.