Information

The sturgeon - profile


Characteristics

Surname: Sturgeon
Latin name: Acipernseridae
class: Fishes
size: 1 - 4m
mass: up to 1500kg
Older: 50 - 100 years
Appearance: gray, black or light brown
Sexual dimorphism: No
Nutrition type: preferably insectivores (insektivor)
food: smaller fish, crustaceans, molluscs, worms
distribution: Northern Hemisphere
original origin: unknown
Sleep-wake rhythm: nocturnal
habitat: at the bottom of lakes and rivers
natural enemies: adult sturgeon do not have predators
sexual maturity: Occurs between the tenth and twentieth year
mating season: March April
oviposition: up to 2,500,000 eggs
social behavior: Loners
Threatened with extinction: No
Further profiles of animals can be found in the Encyclopaedia.

Interesting about the sturgeon

  • The sturgeon or Acipernseridae form a total of 27 species of fish family.
  • Sturgeons are economically very important as producers of caviar.
  • They have been inhabiting the earth for more than 250 million years and are thus among the most primitive creatures of all.
  • The sturgeon is native to a total of 25 countries in central and northern Europe, as well as Asia and North America, where it inhabits cold lakes, rivers and marine waters.
  • Many species of sturgeon are today in serious danger or threatened with extinction. This is mainly due to the illegal trade in caviar.
  • In Europe in the past the Atlantic sturgeon or Acipenser oxyrhincus as well as the European sturgeon or Acipenser sturio were widespread.
  • These two species are difficult to differentiate externally and are now largely extinct due to water pollution and the associated destruction of their spawning grounds. Only in the Gironde on the French Atlantic coast spawn today wild European sturgeon.
  • The sturgeon is a primitive bone fish, which is one of the largest freshwater fish in Europe and can reach lengths of several meters.
  • Depending on the species, sturgeons can weigh up to one tonne.
  • The top of these fish is brown, greenish or blue-black colored, the sides and the belly usually appear in a much lighter tone.
  • The sturgeon is of spindle-shaped physique and has a long, often slightly upwardly bent mouth.
  • Electroceptors and the characteristic four long barbels on the underside of the snout serve the sturgeon as highly sensitive sensory organs.
  • Significant features include the elongated rows of bone plates and the asymmetrically forked caudal fin.
  • Sturgeons search the bottom of the water for food, which consists of small fish, crabs, worms, larvae and molluscs.
  • In early summer, the sturgeons migrate upriver to spawn and lay their eggs on the gravel in streaming waters.
  • The young fish live in fresh water for about a year after hatching, before slowly migrating back into the sea as adult sturgeons.
  • Only from the age of ten to fifteen do sturgeons reach sexual maturity.
  • The roe, that is, the unfertilized eggs, achieve prices of up to six hundred euros per hundred grams as an internationally sought-after luxury delicacy.
  • Every year, several tons of caviar are smuggled and sold as so-called "black gold" on the black market.