THE HISTORY OF FISH-CULTURE. 511 



The fish are sold from the age of six weeks to two years ; the prices 



fixed for spawn and fish are the following : 



Gold. 



1,000 trout or lavaret* eggs, fecundated, and having reached the 



stage where the eyes can be discerned $2 10 



100 young trout, six weeks old and able to seek their own food. . 2 10 



100 trout or lavaret, three months old 3 50 



100 trout or lavaret, six months old 5 60 



100 trout or lavaret, one year old , 10 50 



100 trout, a year and a half old * 17 50 



100 lavaret, a year and a half old 14 00 



100 trout, two years old 21 50 



100 lavaret, two years old 17 50 



100 trout, two years and a half old 31 50 



100 trout, three years old 38 50 



The sale takes place at the following dates : Eggs, from the 1st to 

 the 13th of January to 15th and 27th of March ; hatched fish, from 1st 

 to 13th March to 1st and 19th of June ; trout and lavaret, one month 

 old, in September and October. 



9. — PISCICULTURAL ESTABLISHMENT AT SUWALKL 



We think it our duty to mention, after the piscicultural establishment 

 ofx^ikolsky, another establishment, founded b}^ the government in the 

 province of Suwalki, with the view of increiising the revenue from local 

 fisheries. 



This establishment is located in the water system of Lake Wiczera, on. 

 the Gaueza River, which, near the town of Suwalki, flows through Lake 

 Wiczera and falls into the Augustovo Canal. It commenced operations 

 in 1800, devoting itself chiefly to the breeding of trout, salmon, and the 

 two very rare species of lavaret found in these lakes ; the " seja, '- 

 {Coregonus onarcena,) and the '■^ seMaya,''^ {Coregonus albula,) species which 

 are not so rare in the countries bordering this province on the west. 



The fish raised in the establishment either from spawn artificially 

 fecundated received from other parts, or from spawn fecundated at the 

 establish*ment, have been placed in the lake. The species to which they 

 belonged have in this manner been introduced in sixteen lakes in the 

 province of Suwalki belonging to the government. The labors of the 

 establishment have exercised a favorable influence on the revenue derived 

 from the fisheries on Lake Wiczera, so that the revenue from fisheries, 

 which in 1860 brought 120 rubles ($81) per annum, has risen to 700 

 rubles ($190) in 1869, while the amount of annual revenue from the 

 Lake of Augustovsky has risen from 1,000 rubles to 3,300 rubles^ 

 ($1,120 to $2,310.) 



The lavaret has been propagated to such an extent that at present 

 this fish is sold smoked on the Warsaw markets, which never was the 



* Wliite-fish, (Coregonus.) 



