Emerging disease: Shrimp Hemocyte Iridescent Virus (SHIV)
SHIV is a new Pacific white shrimp virus in the Iridoviridae family. Authors also developed an ISH assay and a nested PCR method for its specific detection.
Development of new and real-time PCR for detection and quantification of NHPB
Authors describe conventional PCR and real-time PCR assays based on the NHPB flgE gene as alternative methods for the detection and quantification of NHPB in shrimp and shrimp-associated samples, including artemia. This newly described method will be an additional diagnostic tool for confirmation of this pathogen.
Evaluating stunning methods in tropical shrimp aquaculture
Study evaluated effects of stunning methods (thermal shock and electric shock) on the welfare of three crustacean species, including Pacific white shrimp.
With animal welfare an emerging consumer concern, fish farmers take stock
Food producers are educating themselves on the latest in animal health and welfare and humane harvesting and processing practices. A recent webinar highlighted issues specific to aquatic animals.
Effects of combining two exogenous carbohydrases on growth of Nile tilapia
This study evaluated the effects of a combination of two exogenous carbohydrases – xylanase and β-glucanase (XB) – to enhance growth performance Nile tilapia juveniles.
Comparing biofloc, clear-water and hybrid RAS systems as shrimp nurseries
This study compared three types of RAS nurseries for shrimp: biofloc (BF), clear-water (CW), and hybrid RAS (HY). Results showed that differences between treatments in terms of shrimp survival, mean harvest weight, specific growth rate, and feed conversion ratio were not significant.
Salmon scientists collaborate on new global health initiative QASH
A cooperative effort between salmon scientists in Norway, Scotland, Chile and Canada aims to develop a globally applicable tool to help management and certification of salmon farms.
Comparing biofloc, clear-water and hybrid RAS systems as tilapia nurseries
This study examined differences in fish performance and water quality dynamics between biofloc, clear water and hybrid systems as nurseries for tilapia.
Study ties animal welfare practices to consumer purchasing
There’s an opportunity to expand the U.S. market for farmed seafood if the aquaculture industry were to more widely adopt humane production practices, according to a study by Changing Tastes and Datassential.
Protein conversion efficiency in aquaculture
Prof. Boyd discusses the overall conversion efficiency of plant protein to animal protein (including pasture animals), which been estimated at 8.3 percent globally. The whole animal conversion for feed-based production is around 35 percent for chickens, 20 percent for swine, and 10 percent for beef.
Intensive production of Pacific white shrimp in a photo-heterotrophic, hypersaline system, part 2
A bio-economic approach was used to analyze the production and economic performance of shrimp reared in semiarid Baja California Sur, Mexico.
Intensive production of Pacific white shrimp in a photo-heterotrophic, hypersaline system: Part 1
This study showed that the use of a hypersaline system for shrimp culture with minimal seawater replacement can produce results comparable to those obtained in marine or brackish shrimp farming systems.
PCR testing of single-tissue samples can result in misleading data
A RT-qPCR study on shrimp with GAV infections showed infection loads could differ among different gill filaments and pleopods from the same shrimp.
The unmet promise of pondside PCR
A new generation of technology, portable PCR, offers potential for affordable, immediate, pondside diagnosis in easy-to-use handheld kits. But will it live up to the hype?
Dissolved oxygen dynamics
Dissolved oxygen management is the most important requirement of aquaculture pond water quality. DO concentration below 3 mg/L is stressful to shrimp.
Grain distillers dried yeast in practical diets for juvenile Pacific white shrimp
A study evaluated the production response of Pacific white shrimp fed diets containing increasing levels of grain distillers dry yeast in two growth trials.