[7] 



OPERATIONS AT CENTRAL STATION. 



885> 



in place of the Potomac water, as there is uuquestionably something 

 deleterious in its effect upon the Salraonidse. Development up to the 

 period of hatching seems to proceed under as favorable conditions here 

 as elsewhere. The mortality after hatching, however, indicates some- 

 thing radically wrong in the conditions to which the fish are subjected. 

 The 500,000 Penobscot salmon eggs received from the Maine Station 

 were in the very best condition, and duriug incubation the percentage 

 of loss was very small. The fry continued healthy for a considerable 

 period after hatching until about the time of the absorption of the sac, 

 when a heavy mortality set in, which no measures could arrest; so that 

 of the original 500,000 eggs there remained for shipment but 424,000. 

 A summary of the results of the work with the SalmonidsB is shown 

 in the following tables, prepared by Mr. W. F. Page from the records 

 of the station : 



Disposition of Penobscot salmon eggs received from Bucksport, Me. 



1883. 



February 1 . . 

 February 3 . . 

 Febraary 8 . . 

 February 24 . 

 March 30 ... . 



April 9 



April 20 



Total. 



Number of 

 eggs re- 

 ceived. 



220, 000 



120, 000 



80, 000 



80, 000 



5,000 



5, 000 



5,009 



515, 009 



Number of 



Lost before i flsb deliv- 

 shipment. I ered for 

 shipment. 



21, 531 

 18, 604 



9,674 

 15, 275 



5,000 



198, 469 



101, 396 



*70, 326 



64, 725 



Time of hatching. 



Com- 

 menced. 



Mar. 

 Mar. 

 Mar. 

 Mar. 

 Apr. 



5, 000 Apr, 



5,009 I Apr. 24 



80, 093 



Finished. 



Mar. 16 



Mar. 19 



Mar. 24 



Mar. 26 



Apr. 7 



Apr. 12 



Apr. 24 



* Of these 10,000 were sent to the London Exhibition. 

 SHIPMENTS. 



April 21— By Mr. Moore, car I^o. 1, to New York 225,000 



April 24— By Mr. Moore, car No. 1, to New York 209,916 



Note. — February 14, 1883, found one jar of eggs of the second lot, 

 containing 15,000, shut off from fresh water (how long time not known) 

 by reason of the clogging with trash and mud. Eemoved 4,509 smoth- 

 ered eggs. February IG, found a further resultant of 536 dead eggs. 

 February 17 got 538 and February 19 got 204, making 5,787. It will 

 be noticed that this is more than died in the regular course of hatching, 

 out of the entire lot of 500,000. 

 Land-Locked Salmon from Grand Lake Stream, Maine, January 



29, 1883 5, 000 



Shipped by Donnelly to Pennsylvania, April 19 1, 467 



Commenced hatching February 25, 1883. Finished February 28, 1883. 



NoTE.^These eggs were shown at the Preliminary Fishery Exhibi- 

 tion at the National Museum, where the water was 6° or 8° higher than 

 that at Central Station. This, undoubtedly, hastened the time of 

 hatching. 



Lal-e Trout from Northville, Mich., November 28, 1883 50, 000 



Sent to London Exhibition 7, 000 



Shipped fish 38, 600 



