'70 



Part III. — Tiventy-seventh Annual Revort 



attendant, and distributed by him. The particulars as to the quantities, 

 dates, temperature of the sea, etc., will be found on the appended table 

 (Table II.), and also the particulars as to the daily progress of the hatching, 

 etc. (Table I.). 



The number of the eggs of the plaice collected from the spawning-pond, 

 and the number of the fry hatched out and liberated in the sea, in the 

 various years since the hatchery was established at the Bay of Nigg are as 

 follows : — 



1900 

 1901 

 1902 

 1903 

 1904 

 1905 

 1906 

 1907 

 1908 



Eggs Collected. 

 43,290,000 

 65,377,000 

 72,410,000 

 65,940,000 

 39,600,000 

 40,110,000 

 7,486,000 

 1,627,000 

 15,332,000 



351,172,000 



Fry Produced. 

 31,305,000 

 51,800,000 

 55,700,000 

 53,600,000 

 34,780,000 

 24,500,000 

 4,406,000 

 1,282,000 

 12,296,000 



269,669,000 



As has been mentioned in former reports, the cost of the fish-hatching 

 work as carried on at the Bay of Nigg, in conjunction with the laboratory, 

 is very small, amounting to an estimated sum per annum of about £80, 

 which represents the extra expenditure for coals, oils, etc., and for 

 occasional assistance to the attendant. 



Table I, — Showing the Daily Progress at the Hatchery, and the Tempera- 

 ture and Specific Gravity of the Water. 



Date. 



Eggs 

 Collected. 



Dead Eggs 

 Removed. 



Beach. 



Air. 



Pond. 



Hatchery. 



Temp. 

 °F. 



Sp. Gr. 



Temp. 

 °F. 



Temp. 

 °F. 



Sp. Gr. 



Temp. 

 °F. 



Sp. Gr. 



1908. 





















Jan. 2 











31-6 



35 6 



27'2 







» 3 











29-1 



34-2 



27-2 







4 











29-8 



35-6 



27-2 







» 6 







38-1 



27-2 



43 5 



36-7 



27*2 







„ 7 











43 2 



40-3 



27'2 







n 8 











37-8 



367 



27-0 







„ 9 







37*4 



27-2 



36-0 



36-0 



27 0 







„ 10 











35 6 



35-6 



27-0 

















414 



36 3 



27-0 







„ 13 



A few. 









37-8 



34-5 



27-0 







» 14 



8,000 





39 ; 2 



27-2 



41-0 



360 



27 0 



38 ; 5 



27-2 



„ 15 



10,000 









446 



36-7 



27 0 



40 3 



27-2 



» 16 



27,000 





44 ; 6 



27-4 



51-8 



39-9 



27-2 



42-8 



27-2 



17 



2,000 









47 5 



40-6 



27-2 



43 5 



27-4 



„ 18 



None. 





39 ; 9 



26-8 



38-1 



38-8 



27 0 



40-6 



27-4 



„ 20 



20,000 





414 



27'2 



40-3 



38-5 



27 0 



37-8 



27-4 



» 21 



10.000 





41 0 



27 4 



39 6 



37'8 



27'0 



38-5 



27-4 



>. 22 



8,000 





40 6 



27-4 



37 4 



36-7 



27-2 



37-8 



27 4 



„ 23 



8,000 





41 0 



27'4 



45 0 



38-5 



27*2 



392 



274 



» 24 



6,000 



6,000 



41-7 



27-4 



41 0 



37-8 



27*2 



39-9 



27 4 



„ 26 



410 



27-2 



414 



37 4 



27'2 



39-2 



27-2 



