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A type of clay used in cosmetics, medicine, and papermaking may be just what aquaculture farmers need to fight columnarisa costly and deadly bacterial disease that affects freshwater finfish worldwide, writes Sandra Avant, USDA, ARS.

The evolution of freshwater shrimps species living in both sides of Central America, isolated by the closure of Isthmus of Panama (3 million years ago) were studied by molecular tools.

Muhammad Kasnir et al, Indonesia Moeslim University, Indonesia, carried out physicochemical studies to asses water resource in Mangara Bombang District, South Sulawesi in relation to their potential for shrimp aquaculture use.

Effective bath immunization systems may be very helpful to the salmon industry, particularly during the freshwater growth stages in which vaccination through injection is not possible, write Dr Juan Battaglia Aljaro, Velsquez S. and Ilardi P., Veterqumica S.A.…

Individual differences in moving activity in a novel environment are linked to individual differences in vulnerability to angling, according to an experimental study completed at the University of Eastern Finland and the Finnish Game and Fisheries Research Ins…

Nitrite is toxic to fishes and is often encountered in recirculation aquaculture systems. Accordingly, the nitrite tolerance of potential aquaculture candidates needs to be assessed before the fish can be farmed in land-based recirculation systems. In the pres…

New research has discovered that the reduction of gonadal stem cells will yield more male zebrafish. The findings, by Lszl Orbn et al, Temasek Life SciencesLaboratory, suggest that a stem cell counting mechanism in the zebrafish gonad is important for determin…

Today, ray-finned fish, which belong to the bony fish, are by far the most biodiverse fish group in both salt- and freshwater.

Research into the use of recirculating aquaculture systems (RAS) addresses the question of how to achieve profitable production while consistently recycling water and nutrients with minimal fresh water demand and waste production. M Buric et al, University of …

This is the second of a series of three articles that focuses on biosecurity in aquaculture. The aim is to provide baseline information for the aquaculture community. In the first article, we focused on biosecurity at the international level. In this article, …

A.M. Abdelhamid et al, Egypt, look at the possible effects of feeding Nile tilapia, silver carp, common carp and African catfish with dried treated sewage. Part one focuses on growth performance, feed utilisation and chemical composition.

For many fishermen and fish farmers, especially in Africa, smoking fish is one of the most important and efficient ways of preserving fish when refrigeration is not available, writes Lucy Towers, TheFishSite Editor.

As part of an EU funded 7th Framework project, Prevent Escape, a programme of research was undertaken by Dave Jackson et al, The Marine Institute, Ireland, to document the extent, size and knowledge of the causes of escapes from marine fin fish farms in Europe…

The purpose of this research by David C. Love et al, Johns Hopkins University, US, was to document the production methods, crop and fish yields, and profitability of commercial aquaponics in the United States (US) and internationally.

Half-century-old roads connecting portions of Bahamian islands while fragmenting the tidal waters below leads to rapid and interesting changes in the fish living in those fragmented sections, according to a new study from North Carolina State University.

Little work dealing with the evaluation of aquaculture system sustainability has so far been undertaken on a global and comparative basis. Moreover, such work is mostly based on very unbalanced approaches in terms of the dimensions of sustainable development t…

Labeo rohita may be able to utilize the non-gelatinized corn starch based diet more efficiently and being economical it spares the protein based cost effective feed, according to research by Mahwish Qamer et al, University Faisalabad, Pakistan.

Organic aquaculture has been implemented in Turkey since 2010. As organic aquaculture represents a new practice area and sufficient promotional efforts and governmental support is not available, satisfactory levels have not been achieved yet in this sector. In…

Growth of hyaline cartilage is achieved either by chondrocyte division interstitial type of growth or by perichondrial cell differentiation of mesenchymal cells to differentiated chondrocytes which deposit successive circumferential layers of cartilage matrix …

Fish meal has historically been the protein source of choice in aquatic feeds, but global supplies have reached a plateau making it less available and more expensive. As a consequence, the use of cheaper proteins made from processed plant proteins, byproducts …

Nonnative species that form novel habitats strongly affect ecosystem processes. The effects of these ecosystem engineers can be both positive and negative but the mechanisms behind their effects are not well described. In this study Jeffrey T. Wright et al, Un…

Aquatic animals have a much closer relationship to their external environment than terrestrial animals and are thus more susceptible to pathogens in their environment.

The use of blue green algae Spirulina in aquaculture has several potential advantages over the production of fish, writes Nasreen M. Abdulrahman and Hawkar J. Hamad Ameen, University of Sulaimaniya.

Research conducted by Susan Laramore et al, Harbor Branch Oceanographic Institute at Florida Atlantic University, studied whether fresh U. lactuca harvested weekly from a land-based integrated multi-trophic aquaculture system could be utilized as a nutritional…

Researchers report that some stickleback fish fathers can have long-term effects on the behavior of their offspring. The most attentive fish dads cause their offspring to behave in a way that makes them less susceptible to predators. These behavioral changes a…

The net movement of individuals from marine reserves to the remaining fishing grounds is known as spillover and is frequently used to promote reserves to fishers on the grounds that it will benefit fisheries. Here Colin D. Buxton et al, University of Tasmania,…

AQUAPLAN 20142019 is Australias third national strategic plan for aquatic animal health. It outlines the priorities to strengthen Australias arrangements for managing aquatic animal health, and to support sustainability, productivity, and market accessand ulti…

Consumer awareness of sustainable aquaculture production has led to increased interest in certification for sustainable aquaculture practices. In contrast to common belief, this certification encompasses a broader scope than just environmental issues. It also …

Proliferative kidney disease is a widespread disease of farmed and wildsalmonid populations in Europe and North America, caused by the myxozoan parasite Tetracapsuloides bryosalmonae. Ahmed Abd-Elfattah et al, University of Veterinary Medicine, Austria, evalua…

Jan G. Davidsen and his graduate students are spies. They use listening stations and special tags they attach to their subjects to track their movements. They follow their subjects winter and summer, day and night.They are in pursuit of secrets and are relentl…

Eyeless Mexican cavefish show no metabolic circadian rhythm in either light and dark or constant dark conditions, according to a study published September 24, 2014 in the open-access journal PLOS ONE by Damian Moran from Lund University, Sweden, and colleagues…

This publication is the annual National Marine Fisheries Service (NMFS) yearbook of fishery statistics for the United States. The report provides data on U.S. recreational catch and commercial fisheries landings and value.

Fish are not silent creatures. Just like the terrestrial world, theres a veritable symphony of sound echoing under the sea.

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 met…

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, TheF…

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 on juve…

Fish is especially rich in essential omega-3 long-chain polyunsaturated fatty acids and micronutrients, including bioavailable calcium, iron and zinc. Fish features prominently in the diet of most, especially poor, Zambians. Despite this, its significance in t…

Pole-and-line fishing is considered to be a sustainable method for catching tuna. However, the reliance on baitfish, which are commonly very variable in their availability, has the potential to introduce unsustainable elements to the fishery, write Arun Padiya…

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 Pdua, Aquivet Sade Aqutica, Roney Nogueira…

Salmon lice Lepeophtheirus salmonis Kryer may affect survival and growth ofanadromous salmonids through physiological stress and/or behavioural changes. Using acoustic telemetry tracking, Karl ystein Gjelland et al, Norwegian Institute for Nature Research, inv…