XX -REPORT OF WORK AT THE UNITED STATES HATCHERY, 

 NORTHVILLE, MICH., 1881-'82. 



Bv Frank N. Clark. 



The tbllowiug report, iu coiiuectiou with the work of this station, for 

 the year ending June 30, 1882, is respectfully submitted. 



The work performed during- the period covered by this report in- 

 cludes the collection and subsequent disposition of the eggs or fry pro- 

 ceeding from 22,500,000 eggs of whitefish {Coregonus albus); 140,000 

 eggs of brook trout {Salvelinus fontinalis) from the ponds of this sta- 

 tion; about 5,000 eggs of the red-banded or rainbow trout of Califor- 

 nia {Salmo iridea), also from the ponds of this station, and 57,000 eggs 

 of lake trout {Cristivomer namaycusli) ; the forwarding of 75,000 eggs 

 of California trout received from the United States station at Baird, 

 Cal., and the care and disposal of the resultant fry; the forwarding of 

 4(),500 eggs of Schoodic salmon received from the United States station 

 at Grand Lake Stream, Me., and the distribution of the fry; and the 

 distribution of 1,500 young carp received from the national car]) i)onds 

 at Washington. 



In addition to this work, the old trout ponds were reconstructed and 

 reoutlined during the months of September and October, and an ad- 

 ditional pond built to accommodate the increased stock of breeders. A 

 survey of the premises was made in July, and a map of the same, show- 

 ing the ])roposed improvements, was soon after submitted to the United 

 States Commissioner. 



For the purpose of creating a large stock of parent fish from which 

 to supply the increasing demand for eggs of California trout, several 

 thousand of the young of these fish were retained from the lot hatched 

 in February and March of the present year, and 12 new tanks fitted for 

 their temporary accommodation. Anticipating the increased accommo- 

 dations required by these fish later on, excavations for three new j)ouds 

 were begun in April, and these are now nearly completed. 



During the first two months of the year under consideration — July 

 and August — no special work was carried forward, the time being oc- 

 cupied with work that is, for the most part, current throughout the 

 year. This includes the preparing and dispensmg of aliment to the 

 growing and adult fish; devising and executing plans for their protec- 

 tion from poachers; affording to the relatively smaller fishes protection 



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