Viruses often are the most potentially damaging pathogens in nature, affecting both wild stocks and farmed animals. Due to an Infectious Haematopoietic Necrosis (IHN) viral outbreak that occurred in Atlantic salmon in British Columbia, Canada some years ago, a vaccine for IHN was developed against this serious threat.
Shrimp postlarvae acclimation before stocking into the various growout systems (ponds, raceways, tanks) is a critical – and often overlooked, sometimes taken for granted – step in the shrimp culture process. Various water quality parameters should be changed slowly so that the young shrimp have the time to gradually adapt to the new conditions.
Biosecurity strategies adopted by the shrimp industry in the Kingdom of Saudi Arabia have resulted in historical production in 2015 and a similar forecast for 2016, and are a significant step towards the long-term goal of sustainable aquaculture.
The use of biofloc technology (BFT) is increasing in the commercial production of several important aquatic species, as it can increase production and efficiency and minimize the potential impacts of effluents. This study showed that BFT systems without water exchange and supplemented with molasses or dextrose as a carbon source yield adequate production and water quality during the hatchery phase of L. vannamei.
Some of the world’s top aquatic animal disease experts shared knowledge about mitigation techniques at the GOAL conference in Guangzhou, China. Topics included sea lice, streptococcus and EHP, which was referred to as the “most insidious” disease impacting shrimp production.
Animal welfare on fish farms encompasses health, diet, water quality, husbandry, handling and slaughter. Add environment enrichment to the list, like a Scottish salmon company, which keeps its fish healthy by keeping them busy.
At this year’s GOAL conference in Guangzhou, China, leading animal welfare and aquatic animal disease experts will share knowledge about how producers can gird their operations. EMS, EHP, streptococcosis and sea lice will be addressed, as will the latest in area management.
University of Stirling Ph.D. student Simão Zacarias, who is from is Beira, Mozambique, will soon travel to Isla del Tigre, Honduras, to document evidence showing the benefits of breeding shrimp without eyestalk ablation. His is a journey of hopeful discovery.
本文介绍了新兴对虾微孢子虫病（EHP）的组织学特征，使用了对患病对虾肝胰腺组织，排泄物，养殖水缸中水样和一些卤虫生物量的PCR化验分析的方法来检测到EHP的存在。(Editor's note: This article was originally published on the Advocate in English on April 15, 2016.)
A feeding trial measured growth, nutrient utilization and faecal/gut bacterial counts in triplicate groups of red hybrid tilapia (Oreochromis sp.). Study results show that dietary organic acids can potentially replace OTC as a growth promoter and anti-microbial in tilapia feeds.
A study with Nile tilapia conducted in commercial production cages in Brazil showed the potential – in the absence of major disease threats – of a commercial, natural growth promotor that modulates the microbiota (inhibiting growth of pathogenic bacteria and promoting growth of beneficial bacteria) and inhibits quorum sensing.
Fungal growth on the eggs caused by the water mold Saprolegnia spp. is an obstacle to the larval production of sunshine bass. This study confirmed that copper sulfate can be an economical and valuable resource in hatchery management for the control of saprolegniasis on sunshine bass eggs in McDonald jars.
Iron is the fourth most abundant element in the earth’s crust, but occurs at very low concentrations in surface waters and oceans. It is an essential element for many organisms as part of many enzymes, and also has an important role in plant photosynthesis.
With practice and common sense, cast netting produces adequate data for successful management of shrimp ponds. It is important, from a practical standpoint, that sampling techniques are adapted to the site, natural resources and human resources available.
Knowledge on population size and size distribution in their production ponds, along with health status assessments, is an important management tool for shrimp farmers around the world. Proper sampling planning and execution involve a number of activities to assure proper, actionable results.
The relationship between production in subtropical earthen ponds of fry suitable for hormonal sex inversion and degree days was quantified for Nile tilapia (Oreochromis niloticus; Egypt strain) and blue tilapia (O. aureus).