Report of the Commissioner for the year ending June 30, 1899 . ponds northeast ofthe hatchery was commenced, and as soon as the new ponds below thehatchery were completed they were also used for this purpose, the fishbeing first assorted and counted and about 5,000 placed to each death-rate after the fry were transferred to the ponds continuedhigh—the loss in April of the brook trout amounting to 14,293, and ofthe rainbows 3,078. In May the mortality of the brook trout amountedto 4,096, and of the rainbows 848. In June 9,534 brook trout died, and961 rainbows, leaving on hand at the cl
Report of the Commissioner for the year ending June 30, 1899 . ponds northeast ofthe hatchery was commenced, and as soon as the new ponds below thehatchery were completed they were also used for this purpose, the fishbeing first assorted and counted and about 5,000 placed to each death-rate after the fry were transferred to the ponds continuedhigh—the loss in April of the brook trout amounting to 14,293, and ofthe rainbows 3,078. In May the mortality of the brook trout amountedto 4,096, and of the rainbows 848. In June 9,534 brook trout died, and961 rainbows, leaving on hand at the close of the year 48,545 rainbow-trout fry and 76,588 brook-trout fry. Several experiments were tried in June to ascertain, if possible, thecause of the excessive mortality in the new ponds. A fence 3 feethigh, of domestic cloth, was placed around one where the mortalitywas heavy j boards were put on edge around the banks of another toprevent the young fish from sleeping in the shallow water; bulkheads Report U. S. F. C. 1899. (To face page LXX.) Plate NEW AND OLD HATCHING-JARS IN USE AT PUT-IN BAY STATION.
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Keywords: ., bookauthorunitedstatescomission, bookcentury1900, bookdecade1900
