Features

Louis A. Helfrich, Extension Specialist; Jim Parkhurst, Extension Specialist; and Richard Neves, Extension Specialist; Department of Fisheries and Wildlife Sciences, Virginia Tech - At times landowners may be confronted with serious water losses resulting from…

The advent of new legislation in Scotland to protect the marine environment is compelling fish farmers and marine specialists to adopt measures to prevent biofouling and the introduction of non-native species into Scottish waters.

For more than two decades, fish farms in the Bet Shean Valley of Israel have cultured a local stock of tilapia derived from hybridizing blue tilapia (Oreochromis aureus) and Nile tilapia (O. niloticus), write Reuven Godel, Reshafim Fish Farm, Amitay Geva, Mini…

This is a review by Hans Komen, Wageningen University, Netherlands and Trinh Quoc Trong, Research Institute for Aquaculture, Viet Nam, of the current developmental state of Nile tilapia selective breeding programs, most of which have focused mainly on growth r…

The majority of global fish stocks lack adequate data to evaluate stock status using conventional stock assessment methods. This poses a challenge for the sustainable management of these stocks, writes Thomas R. Carruthers et al, University of British Columbia…

Given the nutritional value and profile (comparability of amino acids, EFA, and micronutrients) of maggot meal (MM), this study, by Emilie Devic et al, University of Stirling, evaluates strategies for the substitution of fish meal (FM) by MM, different method…

All Tilapias are native to Africa, but have been distributed to every continent not covered in ice. The global tilapia farming industry currently produces 3.5 million tons which are worth almost $6 billion, over 80% of which is produced outside of Africa. In A…

NORWAY - A previously un-described granulomatous disease in Atlantic cod (Gadus morhua L) related to the presence of a Gram-negative, facultative intracellular bacterium belonging to the genus Francisella has been identified.

The FAO paper from the 14th session of the Sub-Committee on Fish Trade reviews the role fish plays in human nutrition and looks at the impact fish trade might have on food security and nutrition. Fish is recognized as an excellent source of protein but also pl…

A plentiful supply of yellow perch was once available in the US Great Lakes region, but that changed in the 1990s. Populations of this Midwest fish-fry favorite dropped dramatically due to the invasion of the zebra mussel, overfishing, and other factors.

Tilapia is globally recognized as one of the most important aquaculture species of the 21st century. Tilapia culture has expanded rapidly in a wide range of farming environments from extensive to intensive in both fresh and brackish water in Asia including Ban…

This study by Yukinori Mukai, International Islamic University Malaysia, and Leong Seng Lim, University Malaysia Sabah, examined the retinomotor responses and prey ingestion rates of 10-, 15-, 20- and 30-day-old Asian seabass Lates calcarifer under different l…

New findings published by researchers at the New York University Polytechnic School of Engineering are helping to unravel the complex interplay between alcohol and social behavior and may lead to new therapies for mitigating the negative impacts of alcohol use…

Positioning of sea cages at sites with high water current velocities expose the fish to a largely unknown environmental challenge. In this study David Johansson et al, Institute of Marine Research, Norway, observed the swimming behaviour of Atlantic salmon (Sa…

The performance of the aquafeed industry in Egypt is not well understood, as the value chain structure has not yet been mapped. This study aims to assess the status of the fish feed sector in Egypt, with an emphasis on: mapping and understanding fish feed valu…

TEXAS - The Gulf Marine Institute of Technology (GMIT), an IRS approved non-profit research institute, has been trying to initiate aquaculture in the Gulf of Mexico since 1995 and has been involved in a "duel with the titans" to convince current Lt. Governor a…

Introduction Discussion of the current shrimp disease crisis focuses on the microbiology of pathogens and the regulations needed to limit their spread locally and across national boundaries (FAO 2008; Jones 2012; Lightner 2012; Reantaso 2012). In this study I …

BASIC PARAMETERS ON HANDLING OF AQUACULTURAL PONDS WATER REPLACEMENT Amount of oxigen dissolved Evaporation and filtering Water temperature Coloring Salinity Turbidity pH TEMPERATURE Water temperature shall be between 25 and 32°C, being the optimal between 29 …

Omer M. Yousif, Kumar K.M. Krishnankutty and Abdul Fatah Ali, Aquaculture and Marine Studies Center, Abu Al Abyad Island, Department of the President's Affairs, looked at the reproductive performance, growth and survival of wild and pond-reared giant tiger shr…

Several indices were examined to assess the physical condition of wrasse stocked on Atlantic salmon, Salmo salar, farms as cleaner fish, and included examination of eye condition, snout erosion, skin hemorrhaging, and erosion and splitting of dorsal, pectoral,…

One of the most difficult problems in Atlantic salmon aquaculture has been to control sea lice (Lepeophtheirus salmonis and Caligus elongatus in the Northern Hemisphere and Caligus rogercresseyi in Chile), which may cause serious harm to aquaculture reared fis…

By Ccile BrugreFishery Planning Analyst, Food and Agriculture Organization of the United Nations Fisheries Department, Rome, Italy and Neil Ridler, Professor of Economics, University of New Brunswick - New Brunswick, Canada - Aquaculture production is expected…

By Pete Southgate, the Fish Vet Group - When keeping ornamental fish as pets, it is just as important to give full consideration to their welfare as with any other pet. The term ornamental fish in itself is an unfortunate one and a more acceptable term may be …

This report by Future of Fish (FoF) represents the first stage of an approach solving complex systemic problems in aquaculture. The insights gleaned through this research and analysis will allow FoF to recruit and convene a working group of entrepreneurs, exis…

This report from the United Nations conference on trade and development looks at trade, value addition and social inclusiveness in the Gambian fisheries sector, with a focus on women.

This article presents a brief summary of Chile's fisheries and aquaculture sectors. It also addresses the main institutions and guilds since the time when there were no regulations until now, where overfishing has lead to the need for regulations through close…

A significant part of the Philippine production is achieved semi-intensively, or even intensively, which creates a demand for supplemental feed. Optimizing of the feeding and nutrition of milkfish is therefore of great interest. Dietary potassium diformate (KD…

By adjusting water discharges in ways designed to boost salmon productivity, officials at a dam in central Washington were able to more than triple the numbers of juvenile salmon downstream of the dam over a 30-year period, according to a study published in th…

Low oxygen zones in coastal and open ocean ecosystems have expanded in recent decades, a trend that will accelerate with climatic warming. Christopher J. Gobler et al, Stony Brook University, US, experimentally assessed the consequences of hypoxic and acidifie…

Increases in atmospheric carbon dioxide drive accompanying changes in the marine carbonate system as carbon dioxide enters seawater and alters ocean pH. As such changes do not occur in isolation, and other environmental factors have the potential to modulate t…

Introduction The anthropogenic increase in atmospheric CO2 concentration is a major environmental concern. One alarming consequence is a rapid change in seawater chemistry and decrease of ocean pH (Solomon et al. 2007; Doney et al. 2009), which could have larg…

Fisheries bycatch of marine animals has been linked to population declines of multiple species, including many sea turtles. John Wang et al, University of Hawaii, examined the effectiveness of illuminating gillnets with ultraviolet (UV) light-emitting diodes f…

Collection and Submission of Samples for Fish-Kill Investigation and Toxic-Substance Analysis - By Robert A. Pierce, Extension Fish and Wildlife Specialist; Thomas W. May, National Biological Survey, National Fisheries Contaminant Research Center and V. Charle…

By Mississippi State University - James C. Miller and Keith H. Coble, Department of Agricultural Economics, Mississippi State University - The term cheap food policy has frequently been used as a descriptor for U.S. commodity programs by those who contend thes…

By Alberta Government - Dugouts provide water for a variety of purposes. They can be used as a source for domestic (household) water supplies, livestock watering, as well as raising fish for enjoyment or profit.

This article from the Soil Association provides a summary of their Organic Market Report 2005. The report highlights that sales of organic products in the UK increased by 33% in 2004. The report also touches on aspects of the European and Worldwide organic sec…

Taurine is not considered an essential amino acid for fish, but many studies indicated that it is conditionally essential, especially if fish are fed plant protein-based diets. In response to these studies, Abdel-Fattah M. El-Sayed, Alexandria University, Egyp…

Tank culture of tilapia is a good alternative to pond or cage culture if sufficient water or land is not available and the economics are favourable.

A new book by scientists based in the Caribbean titled 'Cage culture, the practice of rearing fish in cages', offers a practical overview of how to rear tilpia in net pens.

James E. Rakocy, University of the Virgin Islands and Andrew S. McGinty, University of Puerto Rico and published by the Southern Regional Agricultural Center and the Texas Aquaculture Extension Service - In the U.S., the most appropriatespecies of tilapia for …