Planner

Search planner

« April 2014»
MonTueWedThuFriSatSun
  1 2 3 4 5 6
7 8 9 10 11 12 13
14 15 16 17 18 19 20
21 22 23 24 25 26 27
28 29 30        
huskeliste Linje
pilLink 29.04 Cermaq ASA :..
pilLink 30.04 Marine Harvest ASA..
pilLink 08.05 AKVA group ASA :..

New in business

Vacancies

Fish farmed in Arizona sold in Canada

Canada: If you visit a live fish market in Vancouver, chances are that you will find tanks containing tilapia from farms in the United States where warm water is pumped out of the ground, allowing for low production costs

Odd Grydeland

As previously stated by this FishfarmingXpert writer, one of the ways so-called “closed containment” fish farming can work is when one has access to a supply of either warm water or a source of cheap heating energy where fast-growing fresh-water fish can be produced in a short turn-around time. One such farm that is supplying the Canadian largely Asian community with fresh fish is Desert Springs Tilapia, and Mary Carroll, a student at the University of Arizona recently described this operation and its operational advantages;

On a hot October day, Durkee McMaster scooped up a net of quarter-sized tilapia from a round water nursery tank. The tank is one of several at Desert Springs Tilapia, an aquaculture farm located in the central Arizona desert. With water in short supply and high demand, fish farming in this arid land may seem counterintuitive to sustainability. On the contrary, Desert Springs is making great strides toward sustainable farming in a unique way.

The practice of aquaculture has become popular in the United States over the past 40 years, due in part to the overexploitation of global fisheries. A 2010 United Nations Food and Agriculture Organization report said, “Never has the need for sustainable global fisheries been more apparent and never have global fish stocks been more threatened“.

Kevin Fitzsimmons, professor in the Department of Soil, Water and Environmental Science at the University of Arizona, has worked in aquaculture for 25 years. He says the practice became popular in North America during the 1970s when people recognized that global fisheries were declining due to unsustainable practices, including trawling the ocean floor and overharvesting many species. “Here in Arizona we use a lot of water for irrigation,” Fitzsimmons said. “It just made sense that we grow fish or shrimp in that water before we use it to irrigate field crops – so that all of the waste from fish goes out as fertilizer for the crops.” McMaster and Tark Rush, former students of Fitzsimmons, co-manage and operate the Desert Springs Tilapia farm in Dateland. McMaster holds a degree in fisheries management from the UA School of Natural Resources and the Environment. Rush has a degree in microbiology.

Dealing with salty water

A unique feature of the farm is the use of a water source which has proven inadequate for raising the types of crops historically grown in the area. This farm was originally a cotton farm, McMaster says. As groundwater was pumped down, it became salty. The salinity actually crept into the groundwater. Cotton can handle zero parts of salt so the farm was no longer able to grow cotton.” Tilapia benefit from salinity levels of 2-4 parts per thousand, McMaster explains. “That’s enough to kill most crops—in particular, vegetable or table crops,” McMaster said. “Fish thrive on salt water as a general rule. Even freshwater fish, to a point, will do much better with salinity in the water.”

Farming aquatic, rather than terrestrial animals, for protein makes good sense. Aquatic animals require less energy for body support due to near neutral buoyancy. All farmed aquatic species are poikilothermic. In other words, they do not require energy to regulate body temperature. Feed conversion ratios are much higher for fish - 1.5 kilogram (kg) of feed will produce 1 kg of fish while 8 kg of feed will produce 1 kg of beef. As a mainly herbivorous species, tilapia is a good choice to farm. The fish requires less fishmeal, oils, and protein than other aquaculture farmed species, yet still provides a great source of protein and vitamins. The fish grown at the Arizona farm are packed fresh on ice and shipped to restaurants and supermarkets in Phoenix, Las Vegas, and Southern California.

Year-round productivity

Another unique feature of this farm is that the aquifer supplying the water is geothermally heated. The water comes out at a balmy 85- 89 degrees Fahrenheit. Tilapia thrives in water temperatures of 82-86 degrees. This increases profitability by reducing energy costs and supports year-round production.

The farm enhances its sustainability by making a good second use of of the water. Although cotton cannot grow in the saline water, other crops can. “Most people consider water as their primary input product, but to us, it is a waste product,” McMaster said. “You can either throw it out or you figure out ways to utilize it as a resource.”

The effluent water does not go to waste. It contains key nutrients vital to plant growth including nitrogen and phosphorus. The fish farmers are able to successfully grow acres of wheat, sorghum, alfalfa, and barley while eliminating the need for commercial fertilizers. The efforts at Desert Springs Tilapia are helping to reduce pressure on global fisheries and provide a good source of protein to feed a growing population. Perhaps these methods should be a more profitable and sustainable way of farming for more farmers in the future, Fitzsimmons said. “I would like to see all agriculture in the world integrate with aquaculture and use the water twice. Whether you are in Egypt or Pakistan or Mexico or southwestern Arizona, anybody who is pumping water to irrigate ought to grow fish in it. It doesn’t hurt anything; it just adds a lot of fertilizer value to the water, and the farmer gets another cash crop.”






Tip others
Sent to email:   Your email-address:
 
(usa comma as separator for multiple recipients)    
     
Your comment: (optional)    
 

Multiexport expects harvests 46 percent higher than 2013

Chile: The local salmon producing company Multiexport expects to harvest around 60,600 tonnes of salmonids this year, which represent a 45.8 percent increase compared to the 41,578 tonnes recorded in the previous year. » Read more

Foto: Odd Grydeland

Scottish anglers could be banned from killing and eating salmon

UK: Conservationists want compulsory catch-and-release scheme that would force anglers to return all rod-and-line caught salmon to the river, the Telegraph reports. » Read more

Foto: The Toronto Star

Canadian trout farming goes beyond hobby stage

Canada: Some 6,500 tonnes is now produced in freshwater facilities across the country- most of it in some of the Great Lakes in Ontario » Read more

Foto: SSF

Eday fish farm site regional finalist in 2014 M&S Farming for the Future awards

UK: The M&S Farming for the Future awards celebrate farmers who supply M&S and have proved their commitment to sustainability. Four regional finalists from Scotland will go forward to the finals and Scottish Sea Farms' Eday site in Orkney has been chosen as a finalist. » Read more

Foto: Christian Pérez

AquaChile reports improved harvest weight and mortality rates

Chile: AquaChile informed higher harvest weights and lower mortality rates in Q4 2013 compared to previous quarters, for both Atlantic salmon and Rainbow trout. » Read more

Tank raised salmon soon coming to a store near you

Canada: An Aboriginal-owned salmon farm on Vancouver Island is starting to harvest its first crop of Atlantic salmon raised “on land”, and another workshop on the subject takes place in eastern Canada » Read more

Chilean salmon price: 25 cents below 2013 levels in the US

Chile: Although the price of Chilean Atlantic salmon has shown a slight increase so far this year, it is currently below the level recorded in the same week of the previous year. » Read more

Foto: Audubon Magazine

Loch Fyne oysters receive royal recognition for international trade success

UK: Loch Fyne Oysters is celebrating after receiving the UK’s highest accolade for business success. » Read more

USA, Japan and Brazil are the main markets for Chilean salmon

Chile: US was the largest market for Chilean salmon (Atlantic and Coho) in the first three months of this year with a 33 percent market share and followed by Japan (24%) and Brazil (15%). » Read more


Market / Economy

Our other web sites

Badinotti-2014

Latest News

Science News

Research & Development

Advertisement

Aqua Sur
corner
24. April 2014 kl 10.16
Lower margins for Ewos
24. April 2014 kl 07.45
Strong increase in fish feed for Nutreco
24. April 2014 kl 07.00
Multiexport expects harvests 46 percent higher than 2013
24. April 2014 kl 07.00
Scottish anglers could be banned from killing and eating salmon
24. April 2014 kl 06.35
One more land-based salmon farm gone- one more to go?
23. April 2014 kl 07.50
Canadian trout farming goes beyond hobby stage
23. April 2014 kl 07.00
Eday fish farm site regional finalist in 2014 M&S Farming for the Future awards
23. April 2014 kl 07.00
AquaChile reports improved harvest weight and mortality rates
22. April 2014 kl 07.35
Tank raised salmon soon coming to a store near you
22. April 2014 kl 07.00
Chilean salmon price: 25 cents below 2013 levels in the US
News corner
22. February 2012 kl 10.20
Lean fish provide omega-3
03. February 2012 kl 12.20
Solving the health problems of sterile salmon
03. November 2011 kl 07.58
Low levels of undesirable substances in Norwegian farmed fish
22. September 2010 kl 09.31
Challenging salmon to overcome lice
01. September 2010 kl 07.00
Nytt forskningsprosjekt på fiskehelse
16. August 2010 kl 08.23
Analysis of drug residues and undesirable substances in farmed fish
05. May 2010 kl 07.24
Undesirable substances and drug residues in farmed fish
20. April 2010 kl 07.00
- Fisk føler smerte
16. March 2010 kl 07.00
Surveillance of pharmaceuticals used in fish farming 2009
12. March 2010 kl 08.24
Focus on young people, climate and Atlantic salmon
More articles
Copyright © 2007 Norsk Fiskeoppdrett AS. All rights reserved.
FishfarmingXpert
Boks 4084 Dreggen
5835 BERGEN NORWAY
Editor: Gustav-Erik Blaalid
E-mail: editor@fishfarmingxpert.com
Phone: +47 55 54 13 00
Fax: +47 55 54 13 01
Design & Layout: Vest Vind Media - Powered by: EasyPublish CMS
Charles Murgat 2014  hot spot