Sten-H new top banner Feb 2015

Planner

Search planner

« July 2015»
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 31    
huskeliste Linje
pilLink 13.08 Lerøy Seafood..
pilLink 18.08 AQUANOR 2015
pilLink 25.08 Salmar - Q2 2015

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)    
 
Foto: sernapesca

Fewer infested sites

Twelve Chilean salmonid farming sites were classified as having high lice abundances in week 29. » Read more

Growing support for ASC products

More and more consumers not only recognise the Aquaculture Stewardship Council (ASC) logo, but also view it positively, according to a recent study. » Read more

Lumpsucker firm sets sights on Shetland

Ryfylke Rensefisk (RRF), a Norwegian lumpsucker farming company, has confirmed that they are investigating the possibilities of establishing a lumpsucker farm in Shetland. » Read more

Fishmeal fluctuations analysed

IFFO has given a mixed reception to yesterday’s annual sustainability overview of the fisheries used to produce fishmeal and fish oil. » Read more

Preston to head Worldfish

Worldfish has appointed Dr Nigel Preston, a sustainable aquaculture specialist, as its new Director General. » Read more

Foto: Christian Pérez

First fresh salmon sails into China

BluWrap has completed the first ever fresh salmon delivery from Chile to China by ship - with the fish arriving in Tianjin, the major maritime gateway to Beijing, today. » Read more

Smokehouse revival nearly complete

A South Uist smokehouse is about to launch its first batch of salmon under its new ownership, as it seeks to revive its fortunes. » Read more

Benchmark expansion continues apace

Benchmark has acquired 100% of Norwegian aquaculture genetics and research business Akvaforsk Genetics Center AS (AFGC) and 80% of the issued share capital of Akvaforsk Genetics Center Inc (Spring Genetics), a US-tilapia genetics and breeding business, in a deal worth NOK 140m (£11). » Read more

Feed producers face competion from o-3 supplements

A new report says the fish oil market in Asia Pacific will be worth $1.5 billion (~€ 1.4 billion) by 2020 - driven in part by the concern over chronic diseases. » Read more


Market / Economy

Our other web sites

Salmonview-2015

Latest News

Science News

Research & Development

Advertisement

News corner
29. juli 2015 kl 16.30
Young’s saga continues
29. juli 2015 kl 10.41
Growing support for ASC products
29. juli 2015 kl 09.55
Price nears €5/kg
29. juli 2015 kl 07.36
Canadain aquaculture tops poll
28. juli 2015 kl 22.01
Fewer infested sites
28. juli 2015 kl 12.55
Lumpsucker firm sets sights on Shetland
28. juli 2015 kl 12.01
Fishmeal fluctuations analysed
28. juli 2015 kl 10.37
Preston to head Worldfish
27. juli 2015 kl 22.51
First fresh salmon sails into China
27. juli 2015 kl 11.43
Smokehouse revival nearly complete
More articles
Science corner
08. juli 2015 kl 14.18
Plant-based omega-3 breakthrough
22. februar 2012 kl 10.20
Lean fish provide omega-3
03. februar 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. mai 2010 kl 07.24
Undesirable substances and drug residues in farmed fish
20. april 2010 kl 07.00
- Fisk føler smerte
16. mars 2010 kl 07.00
Surveillance of pharmaceuticals used in fish farming 2009
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
Akva Group