Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Fishing for profits on world caviar market

27.08.2008
As sturgeon populations decline in the Caspian Sea, scientists at the Hebrew University of Jerusalem have a found way for Israel to cash in on the world's growing demand for caviar.

Prof. Berta Levavi-Sivan of the Hebrew University's Robert H. Smith Faculty of Agricultural, Food and Environmental Quality Sciences and Dr. Avshalom Hurvitz have successfully reared Israel's first sturgeon. In the past, the Caspian Sea was the world's main source of sturgeon that produces the black fish roe delicacy. However, over-fishing and pollution have led to dwindling fishing yields in the region.

Prof. Levavi-Sivan and Hurvitz began rearing the fish eight years ago when they brought fertilized sturgeon eggs to Israel from the Caspian Sea. According to Sivan, it takes eight to fifteen years for the female sturgeon to reach puberty and start producing eggs, while male sturgeon reach puberty after four or five years.

Before the age of four, it is impossible to tell the gender of the fish. In order to determine this, an endoscopy is routinely carried out on the fish every year. Once the gender of the fish is determined, they are then separated. Male sturgeon will be sold as fish on the market, while the female sturgeon will be kept in order to produce caviar.

The average female sturgeon can produce US$3,000 worth of caviar. This is proving to be big business for Kibbutz Dan in the north of Israel, where 40,000 of the sturgeon are now being reared in outdoor pools. Managing director of 'Caviar Galilee' in Kibbutz Dan, Yigal Ben-Tzvi, estimates that by 2010, the company's annual revenues will reach US$7.3 million.

While there is significant demand for caviar in Israel among the country's sizeable Russian population, the intention of the producers is to market the fish for export to Europe and North America.

Prof. Levavi-Sivan is also now looking for ways to speed up the puberty process of the female sturgeon in order to reduce the time it takes to produce the caviar.

Sturgeon – and hence caviar - is not generally considered to be kosher, due to the fish's apparent lack of scales. Kosher fish must have both fins and scales in order to be deemed kosher.

However, Prof. Levavi-Sivan, who has undertaken similar fish-rearing projects in Uganda and the Palestinian Authority, suggests otherwise. "If you ask me, it's kosher! I can even prove it has scales," she says, insisting that the sturgeon does in fact have tiny scales that can be viewed with a stereoscope.

A number of Jewish sources – including the 13th century Jewish rabbi and scholar Moses Maimonides – approved the kashrut of a fish called the esturgeon. However, it has yet to be determined whether this is the same fish as the sturgeon.

So, while kosher caviar may be a long way off from hitting Israel's supermarket shelves, the researchers hope that in the meantime, Israeli caviar will at least prove to be a profitable export overseas.

Rebecca Zeffert | alfa
Further information:
http://www.huji.ac.il

More articles from Agricultural and Forestry Science:

nachricht Six-legged livestock -- sustainable food production
11.05.2017 | Faculty of Science - University of Copenhagen

nachricht Elephant Herpes: Super-Shedders Endanger Young Animals
04.05.2017 | Universität Zürich

All articles from Agricultural and Forestry Science >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Can the immune system be boosted against Staphylococcus aureus by delivery of messenger RNA?

Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.

Staphylococcus aureus (S. aureus) is a bacterium that colonizes by far more than half of the skin and the mucosa of adults, usually without causing infections....

Im Focus: A quantum walk of photons

Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.

The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....

Im Focus: Turmoil in sluggish electrons’ existence

An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.

We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...

Im Focus: Wafer-thin Magnetic Materials Developed for Future Quantum Technologies

Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.

Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...

Im Focus: World's thinnest hologram paves path to new 3-D world

Nano-hologram paves way for integration of 3-D holography into everyday electronics

An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Marine Conservation: IASS Contributes to UN Ocean Conference in New York on 5-9 June

24.05.2017 | Event News

AWK Aachen Machine Tool Colloquium 2017: Internet of Production for Agile Enterprises

23.05.2017 | Event News

Dortmund MST Conference presents Individualized Healthcare Solutions with micro and nanotechnology

22.05.2017 | Event News

 
Latest News

How herpesviruses win the footrace against the immune system

26.05.2017 | Life Sciences

Water forms 'spine of hydration' around DNA, group finds

26.05.2017 | Life Sciences

First Juno science results supported by University of Leicester's Jupiter 'forecast'

26.05.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>