REPORT OF COMMISSIONER OF FISH AND FISHERIES. 17 
1889-90. 
During this year the fish-cultural work embraced the propagation of 
the Atlantic and landlocked salmons and the brook and rainbow trouts, 
the Swiss lake trout, the saibling, and the Loch Leven treut. The 
adult Atlantic s eine: purchased jointly by the United States and the 
State of Maine in the summer of 1889, 410 in number, were inclosed at 
Dead Brook, and in the following October, the commencement of the 
spawning season, 292 were recovered. Of these, 186 were females, which 
produced 1,904,000 eggs. In February, 1890, there remained 1,733,675 
good eggs, sine were divided between the Se ae rs, Bian recely- 
ing 600,000 and the United States 1,137,159. Of these latter, 890,000 
were consigned to various State and other hatcheries, and 247, 159 re- 
tained for hatching and subsequent liberation in local waters. 
Besides the Atlantic salmon eggs produced there were received and 
developed eggs as follows: 3,500 of the saibling and 7,400 of the Swiss 
lake trout, presented by Herr Max von dem Borne, of Germany; 18,300 
of the Loch Leven trout, transferred from the Northville Station, Mich- 
igan, and 56,300 of the landlocked salmon from the Schoodice Station, 
which were hatched and reared for the stations at Green Lake and 
Craig Brook. To accommodate the fry anticipated from this large num- 
ber of eggs from June till October, 1890, 100 new troughs were built, 
increasing their total to 163. These troughs were 8 inches deep, 123 
inches wide, and 10 feet long, with a capacity of 2,000 fry. Only 11 of 
the troughs were under shelter, but those in the open air were provided 
with double lids, which form a peak when closed. 
The incubation of the eggs was without event until the yolk stage 
was reached, May, 1890, when they were attacked by a disease hitherto 
. unknown here and by which 30 per cent of the stock was destroyed in 
sixty days. The epidemic first appeared among the Atlantic salmon, 
but ultimately affected, and with greater fatality, the landlocked sal- 
mon, saibling, and Swiss lake trout. Prior to the appearance of the 
disease the fry had been counted and set apart in lots of 1,000 to 4,000, 
and while some lots were wholly destroyed, others were tat partially, 
and still others escaped entirely. 
The rearing operations were successful. Of the original stock of 
144,256 fish, chiefly of the previous year’s hatching, 113,139 were on 
hand October and November, 18389, when most of them were liberated 
in local waters. The percentages saved are shown below: 
cae | > at atart. | Number | Number | Per cent 
Kind. Age at start. at start. | at close.| saved. 
CAG AMG1C SALMO 6 are aja niaielatane ciate ele One year...--- 1, 520 1, 356 89 
WOR este ore oe ae thant Soe a In the egg. 109, 965 91, 856 83 
andlocked‘salmon’.5 =<). - 1c a One year.....- 80 78 97 
WOe saath eaee.cee be saces Ae,|| seating CLG r sn 26, 191 17, 630 68 
Rainbow drowtet.- ai. -ss 3 seee eee ee CO mers se ee 2, 500 947 38 
BVO (EOMtcmics-sichetesieseckse ci Ba aes eee 4, 000 1, 272 | 32 
otal eas ae sess occas a saleeeceaitee cae s 144, 256 113, 139 78 
H. Mis. 
