White Sea herring is known under several names: the Solovetsky, Ivanovo, Yegoryevsky herring and the White Sea.
There are two varieties of these fish - small and large. The small White Sea herring has several subspecies: Onega, Kandalaksha, Dvina.White Sea herring (Clupea pallasi marisalbi).
White Sea herring is a food source for predators such as cod, seal, beluga whale, salmon, as well as seagulls. Caviar is destroyed by a nine-needle stickleback.
The herring trade began to develop in the 14th century, when the Solovetsky Monastery was built. Today - herring is a mass-caught species of fish. This fish is caught on fixed nets, off-net nets and trawls. Salted fish, adding various spices to it. In addition, it is smoked, and part of the catch is frozen.
Herring is a herd of fish whose habitat is coastal zones. White Sea herring can tolerate desalination and low Arctic cold.The average body length of the White Sea herring is 22 centimeters.
The average body length of the White Sea herring is 22 centimeters. Small individuals live for about 8 years, and larger ones for about 14 years. Kandalaksha herring reaches a length of 8-21 centimeters. The average dimensions are mainly 14-15.9 centimeters, and the weight is 22-40 grams. The largest individuals grow to 17-32 centimeters.
The basis of the diet consists of planktonic crustaceans, but in addition they attack smaller fish and destroy eggs. A small portion of the diet consists of algae. The most intensively White Sea herring eats in the summer.
Reproduction of the White Sea herringHerring is a schooling fish.
In Kandalaksha Bay, fish spawn in April-May, and in the Dvina and Onega Bays spawning takes place a little later - in May-June. Even later, large Ivanovo herrings breed in mid-June.In winter, herring is lowered to depth or sent to rivers.
White Sea herring lays eggs in the coastal line, at a depth of not more than 5 meters. Small White Sea herring spawns at water temperatures from 0.3 to 6 degrees, and large species breed in warmer water 7-13 degrees. Water salinity in the White Sea varies between 8.28-27%.
One female of small herring brings from 4 to 21 thousand eggs, and females of large species - from 9 to 62 thousand eggs. Females sweep whole eggs at a time.
White Sea herring migrationHerring is a fish, without which no Russian table can be imagined.
Large herrings sail to the shores in June-July, and small herrings in the autumn-winter period. In winter, herring is lowered to the depths or sent to the rivers of the Onega and Dvina bays, where the water is warmer.