XX -REPORT OF WORK AT THE DiNlTED STATES HATCHERY, 

 NORTHVILLE, MICH., lS81-'82. 



15v Fkaxk N. Clauk. 



The follo\viu<;- report, iu connection with the work of this station, for 

 the year ending' June 30, 1882, is resjiectfully snbmitted. 



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

 cludes the collection and subsequent di.siwsition of the eggs or fry pro- 

 ceeding" from 22,500,000 eggs of whitetish {Corcgonus albus); 140,000 

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

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

 nia [tSalmo iridea), also from the ponds of this station, and 57,000 eggs 

 of lake trout {CHstivomer namaycush) ; the forwarding of 75,000 eggs 

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

 Cal., and the care and disi)Osal of the resultant fry; the forwarding of 

 40,500 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 carp i)onds 

 at Washington. 



In addition to this work, the old trout ponds were recoustru(;ted 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 iu July, and a maj) of the same, show- 

 ing the proposed improvements, was soon after submitted to the United 

 States Commissioner. 



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

 to supi)ly the increasing demand for eggs of California trout, several 

 tliousand 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 newi)onds 

 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 i)art, current throughout the 

 year. This inchides tlie preparing and disix'nsnig 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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