Cold water

Extensive economic losses may be experienced in aquaculture as a consequence of disease outbreaks, according to scientists from Fiskeriforskning.

By Trine Ytrestyl, AKVAFORSK - This thesis focuses on factors that influence the bioavailability of carotenoids primarily in salmonid fishes. Atlantic cod (Gadus morhua) was used in one experiment to study uptake in a white-fleshed species.

By Fiskeriforskning - Winter ulcer causes great economic loss to salmon farmers, especially in North Norway. Fish with sores have less appetite and at slaughter, sores or scars reduce quality. The disease is likely the result of both production and a bacterial…

By Intervet - SRS (a.k.a. Salmon Rickettsial Syndrome or Piscirickettsiosis or Coho salmon septicaemia or Huito disease) is considered to be the most important disease problem in the Chilean salmon farming industry, with economic losses of over US$100 million …

By Fiskeriforskning - Blue whiting (Micromesistius poutassou) is a small, lean cod fish of high importance as rawmaterial for fish meal production in Norway. Fish meal produced from blue whiting generates lower growth and feed efficiency in salmon, halibut and…

Safely transporting fish from the hatchery to the pond and then on to the market is a very important part of aquaculture, says the University of Auburn.

By Dave Cockerill, the Fish Vet Group - In recent years spinal deformity has become an increasingly important condition for salmon producers and especially processors. Some populations are virtually unaffected, but the incidence of deformity can be above 30%, …

From The USDA's APHIS - These guidelines apply to the following farmed species of fish: salmonids and cyprinids. The guidelines may also apply to other fish species. The length of time fish spend on a transport should be as short as possible.

In a new book, The Benefits of Fish Meal in Aquaculture Diets, RD Miles and FA Chapman, from the University of Florida, explain the value of fishmeal in feeds for fish and shrimp.

Michael McGee and Charles Cichra review some of the most important considerations relating to fingerling purchasing, transporting, and stocking.

By Jeffrey M. Hinshaw, North Carolina State University and published by the Southern Regional Agricultural Center and the Texas Aquaculture Extension Service.

By Katheleen F. Ladewig and Michelle Morat and published by the Southern Regional Agricultural Center and the Texas Aquaculture Extension Service - The rainbow trout has always been known as a great sport fish. But, in recent times, along with its sport connot…

By Jeffrey M. Hinshaw and Skipper L. Thompson, North Carolina State University and published by the Southern Regional Agricultural Center and the Texas Aquaculture Extension Service.

By Jeffrey M. Hinshaw, Lindsay E. Rogers and James E. Easley, North Carolina State University and published by the Southern Regional Agricultural Center and the Texas Aquaculture Extension Service.

By Jeffrey M. Hinshaw, North Carolina State University and published by the Southern Regional Agricultural Center and the Texas Aquaculture Extension Service.

By Fiskeriforskning - For a long time, vibriosis was the most serious bacterial disease in farmed cod, but now other diseases also result in significant mortality.

By Arild Kollevaag, Commercial Operations Dept., Intervet Norbio AS - In recent years, between 160 and 170 million salmon and rainbow trout have been vaccinated each year in Norway. The vast majority of these were vaccinated by injection (intraperitoneal) with…

By Pete Southgate, the Fish Vet Group - In the summer of 2005 many UK trout farmers experienced serious outbreaks of eye fluke infestation which resulted in severe pathology in affected fish and consequent losses. The eye fluke - frequently Diplostomum spathac…

By Jon Weldon and published by North Atlantic Fisheries College - The Atlantic cod (Gadus morhua) has been identified as a species with considerable potential for intensive farming in northern Europe and Canada.

NORWAY - Harald Takle, research fellow at AKVAFORSK, has identified several genes that are active when deformities occur at the egg stage in farmed salmon. He recently presented his findings in his doctoral dissertation at the Norwegian University of Life Scie…

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…

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…

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,…

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…

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 Janet Raloff and published by Science News Online - Aquaculture - farming fish for our dinner tables - is a big and growing international industry. Because many of the tastiest and most-profitable farmed fish are carnivores, their prepared diets usually inc…

By the USDA, Foreign Agricultural Service - The European Commission (EC) has published a proposal concerning the animal welfare of farmed fish to be adopted at the November 2005 meeting of the Standing Committee of the European Convention for the Protection of…

Introduction Marine protected areas (MPAs) have received increasing attention as tools in fisheries management and conservation. However, examples of replicated experiments that sampled organismal density before and after establishment of MPAs at sites both in…

A genetic linkage map has been constructed for Atlantic halibut on the basis of 258 microsatellites and 346 AFLPs. Twenty-four linkage groups were identified, consistent with the 24 chromosomes seen in chromosome spreads. The total map distance is 1562.2 cM in…

Aquaculture Outlook Report - October 2005 - By U.S.D.A., Economic Research Service - This article is an extract from the October 2005: Aquaculture Outlook Report, highlighting Global Aquaculture Industry data.

By David Cox, the Fish Vet Group - The Veterinary Health Plan (VHP) has been used for several years as part of good farming practice in many terrestrial animal production systems and forms the basis of several herd and flock health schemes.

By Pete Southgate, the Fish Vet Group - While oxygen and ammonia levels are often viewed, rightly, as critical to fish health and performance, carbon dioxide tends to be ignored and very few aquaculture facilities regularly monitor CO2 levels. This is partly d…

By Alasdair H McVicar, Garien Aquaculture and Fish Health Consultants Ltd - There are serious inadequacies in the paper many of which could be attributable to mathematicians analysing numerical data without adequate attention being given to the reality and com…

By Jeffery A. Foran, Midwest Center for Environmental Science and Public Policy, David O. Carpenter, Institute for Health and the Environment, University at Albany, M. Coreen Hamilton, AXYS Analytical Services Ltd, Barbara A. Knuth, Department of Natural Resou…

Presented by Canadian agencies and organizations currently undertaking aquaculture research in Canada - Commercialization of cod aquaculture in Atlantic Canada has taken a significant step forward with two research projects currently underway in Newfoundland.

By the USDA's National Agricultural Statistics Service - This full-text annual report by NASS contains the number of trout operations, grower sales, and fish losses for selected states during 2004.

By DuPont Animal Health Solutions - Now that salmon and trout eggs are near hatching, farmers will be getting hatching trays and first feeding troughs ready. As this signals a potential increase in the risk of infection, one of the key requirements is to thoro…