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Chronic Exposure to High Nitrate Concentration Reduces Growth and Affects Health of Juvenile Nile Tilapia in RAS
Due to nitrate accumulation during nitrification and low water-exchange rates in recirculating aquaculture systems (RAS), nitrate levels can build up. Hendrik Monsees has therefore investigated the effect that exposose to high nitrate concentration has...
European Seabass Perform Better in Cages With a Big Volume
Although the effects of fish density on the performance of fish have been widely studied, there has been little work done into the effect of cage size on seabass performance, said Athanasios Samaras speaking at Aquaculture Europe 2014, writes Lucy Towers,...
Effects of Temperature, Digestion on the Swimming Performance of Juvenile Chinese Bream
To test whether digestion affected swimming performance in an active forager and whether the possible effects varied with temperature, Jing Peng et al, Chongqing Normal University, investigated the critical swimming speed (Ucrit) and the resting and active...
A Nutritional Additive Increases Survival and Reduces Parasitism in Nile Tilapia During Masculinisation
Ectoparasites are key agents responsible for causing diseases in farmed fish. The Nile tilapia, in particular, has been shown to be susceptible to infestation by trichodinids and monogeneans, write Santiago Benites de Pádua, Aquivet Saúde Aquática,...
Effects of Salmon Lice Infection on the Behaviour of Sea Trout in the Marine Phase
Salmon lice Lepeophtheirus salmonis Krøyer may affect survival and growth of anadromous salmonids through physiological stress and/or behavioural changes. Using acoustic telemetry tracking, Karl Øystein Gjelland et al, Norwegian Institute for Nature...
First Report of Winter Epizootic of Salmon Lice on Sea Trout in Norway
Knut Wiik Vollset and Bjørn Torgeir Barlaup, Uni Research - Environment, LFI, Norway, report on the first observation of a winter epizootic of salmon lice Lepeophtheirus salmonis Krøyer on sea trout Salmo trutta Linnaeus in a Norwegian fjord with intensive salmon...
Detection and Surveillance of Viral Hemorrhagic Septicemia Virus Using Real-time RT-PCR. Part Two - Diagnostic Evaluation of Two Protocols
Two real-time reverse transcription polymerase chain reaction (rRT-PCR) assays under consideration for deployment to multiple testing laboratories across the USA were evaluated for diagnostic sensitivity and specificity on tissue homogenates obtained...
Health Challenges in Tilapia Culture in Brazil
In line with the level of investment, changes in concepts with regards to sanitary and health management can ensure stable and efficiency in production. Risk reduction from diseases requires continuous diagnosis of pathogens, adoption of biosecurity measures...
Detection, Surveillance of Viral Hemorrhagic Septicemia Virus Using Real-time RT-PCR. Part One - Initial Comparison of Four Protocols
Eight laboratories worked collectively to evaluate 4 real-time RT-PCR (rRT-PCR) protocols targeting viral hemorrhagic septicemia virus (VHSV) being considered for deployment to a USA laboratory testing network, write Janet V. Warg et al, National Veterinary...
Bonamia Parasites: A Rapidly Changing Perspective on a Genus of Important Mollusc Pathogens
This review focuses on the recent advances in research on genetic relationships between Bonamia isolates, geographical distribution, susceptible host species, diagnostics, epizootiology, host parasite interactions, and disease resistance and control of...
'Big Picture' Connects Shrimp Disease and Inbreeding
Disease problems on shrimp farms may be partly driven by an interaction between management practices that cause inbreeding in small hatcheries and the amplification by inbreeding of susceptibility to disease and environmental stresses, writes Roger W....
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, write Kenneth R. Thompson...
Epidemiology of Bonamia in the UK, 1982 to 2012
Bonamiasis, caused by Bonamia ostreae, was confirmed in native flat oysters Ostrea edulis L. in England in 1982. This paper reports on the controls and associated monitoring applied in the UK to prevent the spread of Bonamiasis and reports on the epidemiology...
Quantification of Intestinal Trophism in Sole Fed Mussel Meal Diets
The evaluation of intestinal trophism, mainly the mucosal layer, is an important issue in various conditions associated with injury, atrophy, recovery, and healing of the gut. The aim of the present study was to evaluate the kinetics of the proliferation...
Role of Vitamin C & Multivitamin Diets for Enhacement of Immunity, Growth & Biological Performance in Shrimps/Fish
Good nutrition in aquaculture systems is essential to economically produce a healthy and high quality product, writes Mr Prakash Chandra Behera, Technical Manager (Aqua Division), PVS Group, India....
 
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