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…
Over the past 50 years, the University of Guelph has gained an enviable reputation, nationally and internationally, for its innovative research programs in aquaculture nutrition and expertise in aquaculture feed formulation. The history of fish nutrition resea…
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…
The Global Oceans Commission sets out eight proposals to help advance high seas recovery in its latest report 'From Decline to Recovery A Rescue Package for the Global Ocean'.
Several decades ago bacteria were primarily considered as separate entities of unicellular organisms that do not interact with each other. However, this view has changed and many bacterial species are now known to coordinate behaviour at a multicellular level …
Accompanying acute hepatopancreatic necrosis disease (AHPND) in cultivated Asian shrimp has been an increasing prevalence of vermiform, gregarine-like bodies within the shrimp hepatopancreas (HP) and midgut. In high quantity they result in white fecal strings …
The trajectory of aquaculture growth in sub-Saharan Africa has necessitated closer attention to the use of environmental best management practices (BMPs). Two BMPs in particular, water reuse and floating feeds, are being promoted for adoption by pond fish farm…
New species are more likely to evolve if parents guard their offspring than if they allow them to drift away on ocean currents to make it on their own in the big deep blue.
As aquaculture develops, the industry faces several challenges related to its environmental impact. The application of beneficial bacteria (probiotics) is not only associated with gut health (feed probiotics), but also with bioremediation that improves the env…
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.
Ecosystem-based fishery management (EBFM), also referred to as the ecosystem approach to fisheries (EAF), considers all the living and non-living components of a marine community when managing fisheries, reports the Sustainable Fisheries Partnership (SFP).
Two-thirds of the 133 billion pounds (5.9 million tonnes) of food loss in the US in 2010 occurred in homes, restaurants and other place outside the home, and one-third occurred in grocery stores and other food retailers, according to a new report from the USDA…
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…
Fishincluding finfish and shellfishare an important item inthe human food basket, contributing 17 percent of the globalanimal-based protein supply in 2010. They are an especially valuable food source in developing countries, where more than 75 percent of the w…
The complete genetic code was made public at an international conference in Vancouver on 10 June. Fully sequencing the Atlantic salmon genome is a landmark achievement and provides a wellspring of new opportunities for scientists and the aquaculture industry w…
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…
Naturally occurring coinfections of pathogens have been reported in salmonids, but their consequences on disease resistance are unclear. Jos A. Gallardo et al, Pontificia Universidad Catlica de Valparaso, Chile, hypothesized that coinfection of Caligus rogercr…
This study by Ahmed Mohamed Nasr-Allah et al, WorldFish, Egypt, was carried out in order to understand the technical and economic characteristics of different Egyptian Nile tilapia (Oreochromis niloticus) hatchery systems.
This article from the FAO Globefish Highlights report will provide an overview of production, consumption and consumer trends as well as trade in the Middle East, concluding with summary findings on opportunities and challenges in the region. The Middle Easter…
The objectives of this study by Yngvar Olsen et al, Norwegian University of Science and Technology, Norway, were to examine if early cod larvae could incorporate long-chain highly unsaturated fatty acids like docosahexaenoic acid (22:6 n-3, DHA) from dietary p…
This FAO technical paper, edited by Mohammad R. Hasan, Aquaculture Officer, FAO, provides a comprehensive review of on-farm feeding and feed management practices in aquaculture.
During spawning season, a largemouth bass male attentively guards its nest. Recent research at the University of Illinois found that catch-and-release angling could give bass predators the perfect opportunity to consume the young. In fact, the time spent away …
Harmful algal blooms (HABs) have become serious marine environmental disasters, and are spreading all around the world, threatening marine organisms and human health, and limiting economic development in fisheries, aquaculture, and tourism, writes Tianling Zhe…
This study by Mark Cyrus et al, University of Cape Town, South Africa, investigated growth and gonad production of Tripneustes gratilla fed four protein-rich artificial diets supplemented with varying amounts of the macroalga Ulva over a 12-week period.
White spot syndrome, caused by the white spot syndrome virus (WSSV), is the most serious viral disease in penaeid shrimps causing 100 per cent mortality post infection. In the last two decades outbreaks of this virus in commercial shrimp aquaculture farms have…
Soundarapandian. P and Varadharajan. D, Annamalai University, India, evaluate the relative reproductive potential of male morphotypes of M. idellaidella by examining their mating strategy is close quarter in an aquarium.
Ovarian maturity of white sturgeon farmed in California (Sterling Caviar, LLC) (N=400) and Idaho (Fish Breeders and Blind Canyon Aqua Ranch) (N=143) was determined by correlating blood plasma spectral features with oocyte polarization index, an index of germin…
Tilapia species constitute a major and important item in Egyptian fish farming. It displays many favourable attributes as culture species, on the basis of its general hardness, resistance to diseases, high yield potential and ability to grow on a wide range of…
This study by Albin Grns, Erik Sandblom, Anders Kiessling and Michael Axelsson, University of Gothenburg, Sweden, assessed the effects of an opioid drug, buprenorphine (0.05 mg/kg IM), on resting ventilation and heart rates during 7 days of postsurgical recove…
Marshall C. Richmond et al, Pacific Northwest National Laboratory, US, introduce a method for hydro turbine biological performance assessment (BioPA) to bridge the gap between field and laboratory studies on fish injury and turbine engineering design. Using th…
Fish depend on dietary fatty acids (FA) to support their physiological condition and health. Exploring the FA distribution in common carp (Cyprinus carpio), one of the world's most consumed freshwater fish, is important to understand how and where FA of differ…
This study by A. M. Abdelhamid et al, Al-Mansourah University, Egypt, aimed to investigate the effect of dietary graded levels of three pre-and probiotics on the immunity and haematology of all-males mono-sex Nile tilapia fish.
Torfinn Moldal et al, Norwegian Veterinary Institute, investigated the intestinal health in Atlantic salmon fed with different vegetable oils as partial substitutes of fish oil in the diet.
Biologists could gain a deeper understanding about how species have evolved and even find ways to address antibiotic resistance using tools that were developed recently at Stockholm's KTH Royal Institute of Technology.
A series of experiments showed that fishmeal is not an essential ingredient in tilapia feeds and that plant protein-based diets can yield results similar to those obtained with diets containing 10 per cent fishmeal, write Nathan Gur and Guy Rubinstein, Israel …
Anecdotal reports have indicated polyculture and biofloc systems can reduce outbreaks of diseases at shrimp farms. A laboratory study at the University of Arizona examined the effects of tilapia in controlling acute hepatopancreatic necrosis (AHPN) infection a…
The objective of the present study was to determine the effects of dietary inclusion of different levels of pawpaw seeds powder (PSP) at different periods on the growth performance, survival rate, feed utilization and carcass composition of fry and fingerlings…
