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Caviar Guide (Types, Quality, Glossary)

  The quality of caviar depends on the origin and the type of preparation, as well as the care taken during the preparation stage.

  Connoisseurs prefer fresh malossol, which contains a maximum of 5 percent salt by weight. Borax, which acts as a preservative, is added in France to caviar with low salt content (not in the United States, however, where borax is an illegal food additive).

  Specialists read the information printed on the side of the tin when the caviar was packed. This indicates the number of fish, the number of tins filled with roe from the same fish, and the color classification of the caviar' (light, medium, dark).

  The second quality found on the market today is salted caviar, which contains up to 8 percent of salt by weight. This type of caviar is generally destined for the American market, where borax is prohibited by law.

  The third quality is pressed caviar, made from soft, broken or over-mature eggs. They are placed in highly salted, hot brine and shaken until the caviar is no longer milky. This salted caviar is then placed in cheesecloth and put in small oak barrels coated with paraffin. The caviar is then pressed to remove the excess liquid. This type of caviar used to be so thick that it could be sliced with a knife, but pressed caviar today is softer and can be spread like jam. Russians prefer the strong flavor of this caviar, which is also recommended for cooking.

  Finally the last quality is pasteurized caviar: it is vacuum-packed in small glass jars three to four hours after the fish has reached the processing plant. The pasteurization process, which involves heating the eggs, alters the flavor of the caviar, but it can then be stored for a longer period of time.

Caviar Types - Glossary

  Almas Golden caviar types.    Either the eggs of the albino sturgeon or those of an Oscietre sturgeon, which is at least 60 years of age. The flavors, respectively are light and delicate or creamy and subtle.

  Beluga Huso huso.   These large sturgeon are now extremely rare. Beluga eggs are the largest and are light grey to nearly black with a fine skin that melts in the mouth. The flavor is delicately fishy.

  Kaluga Huso dauricus.   One of the largest sturgeon species comes from the Amur and Liman Rivers in China. Commonly known as Kaluga, it resembles the Beluga and matures at around eighteen to twenty years of age. An average fish weighs around 80 kg (176 lb) and is about 2.3 m (7 1/2 ft) in length. The eggs from the Kaluga may be acceptable if they are fresh. The eggs are similar in size to those of a young Oscietre and are processed with up to 6% salt.

  Malossol   means "lightly salted" in Russian, although today the term has come to mean any high-quality caviar types. Traditionally only eggs that are in prime condition are prepared and labeled in this way. It takes great expertise to judge at what stage a sturgeon's eggs are absolutely right for this process, which should not contain more than 2.8-3% salt. In the US and Iran pure salt is used, but in Russia and some eastern countries a small amount of legally permitted borax is added, which many experts believe helps to preserve the caviar and enhances its natural flavor by sweetening it slightly.

  Oscietre Acipenser gueldenstaedti.   These sturgeons produce the widest range of eggs. The eggs fade from dark golden to a pale amber as the fishes age and tend to have a subtle "walnuts and cream" flavor.

  Pasteurized caviar.   Caviar is put into glass jars, sealed, then placed in water baths at a constant temperature of about 60°C (140°F). The jars are normally labeled in the traditional colors: Sevruga with a red label, Oscietre with a yellow label and Beluga with a blue one.
  If pasteurization is correctly carried out there should be no discernible change in the eggs' flavor, although they can become a bit firmer.
  Pasteurized caviar could be kept unrefrigerated for up to one year, but once opened, needs to be consumed within a few days.

  Pressed caviar.   This has a very salty, fishy taste. In the past pressing was the first known method of preserving sturgeon roe. Nowadays it is normally made from Sevruga or Oscietre that has been damaged in processing. Immature or overripe eggs are also used for this purpose. It takes 6 kg (15 lb) to make 1 kg (2/4 lb) of pressed caviar.
  Before refrigeration, pressed caviar was very expensive, because it could not be preserved for a long period. Today it should cost around the same as Sevruga, or slightly less.

  The Russian term for pressed caviar is payusnaya ikra. Pressed caviar is difficult to find outside Russia, but many connoisseurs claim that it is their favorite form of caviar, as it has such a dense, strong flavor. It is definitely an acquired taste.

  Schipp Acipenser nudiventris.  Schipp is the result of cross-breeding a Sevruga with a Sterlet. It is sometimes sold commercially, but is usually packaged as either Sevruga or Oscietre, depending on the egg size, although its eggs are often less firm than those of its parent fish.

  Sevruga Acipenser stellatus.  These are the smallest sturgeon whose grey-black eggs are fine grained. They taste distinctively salty. Sevruga is the least expensive, yet highly prized for the unique flavor.

  Sterlet Acipenser ruthenus.  The Sterlet is similar to, but smaller than, the average Sevruga is known to reach 1.25 m (4 ft) and weigh of 26 kg (55 lb).

  Fifty years ago average of 700 tones were caught a year. Now they are very rare. Although it is no longer caught in commercial quantities, Sterlet is a very important fish as far as propagation is concerned. It breeds and cross-breeds successfully in warm water with other species of sturgeon, making it vital for the future of the species.

  The Sterlet is often mentioned throughout history, as it was very popular at all kinds of feasts and banquets, especially as caviar soup.


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