Amino acid supplementation reduces protein levels in pangasius diets
Trials show that supplementation with amino acids could reduce protein levels from a typical 28 percent to 23 percent in pangasius diets.
Bacillus probiotics benefit tilapia rearing under challenging conditions in Brazil
A recent study that evaluated the benefits of using probiotics with a balanced mixture of Bacillus bacteria strains to inhibit pathogenic bacteria in tilapia.
Maximizing profits of larval shrimp rearing
Easily digested, live artemia offer important animal health benefits and improved performance when included in feeding regimes for larval shrimp. Pilot and commercial-scale trials have confirmed that artemia can be partially replaced in shrimp feeding.
Brazil survey: Animal welfare perspectives vary between producers, researchers
Survey participants also indicated that, in general, Brazil’s fish-farming industry is addressing elements of animal welfare to some degree, but can improve.
Temperature affects quality, safety of quahog clams
The rapid cooling of harvested quahog clams to achieve the product temperatures required by regulators and dealers can often result in mortalities due to thermal shock.
Dietary acidifier potassium diformate improves growth, survival in pangasius
As examined in various studies, potassium diformate can improve the growth and health status of pangasius when the dietary acidifier is included in feed.
Potential of YY male tilapia technology
YY male tilapia technology, based on the genetic manipulation of sex, provides a robust, reliable method of achieving male fish. It avoids the use of hormones and maintains strain purity in genetically normal males.
Beneficial microbes and pathogen control
A range of alternative products is available to improve animal health and water quality, and control pathogen loads. Beneficial microbes produce antimicrobial compounds and suppress pathogen proliferation.
Caveat emptor when seeking for EMS solutions
The development of polymerase chain reaction testing to detect the bacteria that cause EMS is important, but confirmation by bioassay of presumptive positives to ensure pathogenicity is a prudent intermediate step.
Development of 1-monoglycerides against AHPND
1-monoglycerides are known for their antibacterial and antiviral effects in the human pharmaceutical and animal husbandry industries. As a substitution for the preventive use of antibiotics, these molecules are being evaluated in the fight against AHPND.
Raceway systems offer tools for EMS management
Highly controlled tank and raceway systems can help farmers raise postlarval shrimp to larger sizes before stocking in grow-out ponds. Raceways have recently been implemented for EMS management.
Advances in intensive copepod production technology
Research at the Oceanic Institute has been successful in overcoming bottlenecks associated with rearing small-mouthed fish larvae by finding a suitable first feed. Early work on the calanoid copepod Parvocalanus crassirostris focused on parameters necessary for successful maintenance of stock cultures.
The search for sustainable grouper farming
In targeting grouper for new and sustainable farming technology, the authors developed an oral vaccine to control nervous necrosis virus (NNV) infection at the larval stage and multivalent injective bacterial and viral vaccines for the grow-out stage.
Inbreeding cuts growth, reproduction in shrimp
Shrimp-breeding programs release only a small fraction of their genetic material when they sell seed to clients for grow-out. This protects their large investment in developing the stocks so clients return for their next batch of seed instead of breeding the stocks themselves.
Lipid oxidation results from heme catalysis
Iron compounds in fish contribute significantly to lipid oxidation in addition to oxidation mediated by enzymatic activity. The main iron-containing compounds are myoglobin and hemoglobin.
Hybrid, channel catfish show similar immune responses to ich parasite
In a study, the authors evaluated the immune responses and host protection of hybrid catfish and channel catfish against the ich parasite (Ichthyophthirius multifiliis).