Freshwater fish

The importance of aquaculture in Asia goes beyond its relatively high contribution to the worldwide aquaculture output. Fish products feature prominently in local diets of Southeast Asia. Around 31 million people are employed in aquaculture in Asia, writes Rui…

Feed represents the largest production cost in tilapia (Oreochromis niloticus). As a result of ever increasing raw material prices, nutritionists are under continuous pressure to reduce formulation cost and search for cheaper, alternative ingredients, write Gi…

The level of success we get in catfish farming is usually tied to the level of management practices we decide to put in place in conjuction with the level of efficiency we achieve from our culture systems, writes Lanre Ogunsina, Fish Unlimited in Part 1.

With interest in culturing tilapia in marine habitats increasing, producers must obtain tilapia capable of growing well in seawater, writes Mohammad T. Ridha, Kuwait Institute for Scientific Research. Taken from the Global Aquaculture Advocate, a Global Aquacu…

In a study by Rachel Cristina Prehl Alves et al, Universidade de So Paulo, the authors evaluated the stunning effectiveness of thermonarcosis, carbon dioxide narcosis and electronarcosis by assessing the electrical brain activity of tilapia. Although results v…

Achieving and maintaining good water quality through all stages of production plays a major role in overall fish health and performance.

This guide from Infonet-Biovision provides easy to follow information on hatchery management and tilapia fingerling production.

A 50-day feeding trial was conducted to determine the effects of dietary bamboo charcoal (BC) on ammonia (NH3-N) excretion and growth performances of Pangasius hypophthalmus, write M Sadiqul Islam et al, Bangladesh Agricultural University.

This guide from Infonet-Biovision provides easy to follow information on how to build a pond for fish farming including findding a location, water inlets, pond size and costs.

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.

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 …

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.

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…

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…

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 a…

FISHY was first developed in 1980. It was written in Basic and ran on Radio Shack TRS-80 computers. Lee Fouch (an MSU agricultural economics and computer science graduate) and I wrote the initial version, with heavy assistance by agricultural economics profess…

Nicholas Robinson et al, Nofima, Norway, genotype full-sibling families using an Illumina iSelect array containing SNPs found in transcribed genes, in order to produce a genetic linkage map of the L. rohita genome and simultaneously scan the genome of challeng…

This research report contains a brief look at the current status of catfish feeds and is primarily intended for catfish producers and feed formulators and manufacturers, write Edwin H. Robinson and Menghe H. Li, Delta Research and Extension Center in Stonevill…

Research by A. M. Abdelhamid and Ahmed Ismail Mehrim, Al-Mansoura University and I.A.Radwan and A.F.Abdelhamid, Al-Hamoul Fish Hatchery looks at the possibility of reducing cannibalism among newly hatched catfish (Clarias gariepinus) fry by grading.

During the last three decades, a great attention was paid towards aquaculture as an attempt to fulfill the gap between the increased population and their demands from animal protein, write A.M. Abdelhamid,Al-Mansoura University, Mohamed H. Ahmed and Doaa Kh. K…

Any fish farmer that wants to record a high survival of fishand better growth in record time in their ponds must endeavour to paygood attention to pond water quality, writes Lanre Ogunsina.

Two genetically improved tilapia strains (GIFT and Akosombo) have been created with Oreochromis niloticus (Nile tilapia), which is native to Africa. In particular, GIFT has been shown to be significantly superior to local African tilapia strains in terms of gr…

Many farmers have been unable to successfully breed African Catfish. Several attempts made have given unfruitful results. In this guide, Lanre Ogunsina lists his own simple 19 proven steps to efficiently breed the African Catfish.

This study by Ahmed Mohamed Nasr-Allah et al was carried out in order to understand the technical and economic characteristics of different Egyptian Nile tilapia (Oreochromis niloticus) hatchery systems. Hatchery operators at fifty tilapia hatcheries in four g…