436 



BULLETIN OF THE BUREAU OF FISHERIES. 



Table II. — The blood pressure and heart rate, together with the respiratory rate, of salmon from the 



spawning lieds. 



[Experiments performer! at Baird, Cal.] 



Date. 



1901. 

 Aug. 8 



Aug. 8 

 Aug. 10 

 Aug. 12 

 Aug. 13 



Aug. 14 

 Aug. 14 



Aug. 14 



Aug. 15 



Aug. 15 



Aug. 16 



Aug. 17 



Aug. 17 



Aug. 28 



Aug. 28 



Aug. 28 



Aug. 28 



Aug. 28 



Aug. 29 



Sept. 1 



Aug. 31 



1902. 

 Aug. 18 

 Aug. 18 

 Aug. 18 

 Aug. 19 

 Aug. 19 



Aug. 20 

 Aug. 21 

 Amjj 22 

 Aug. 23 



Aug. 23 

 Aug. 25 

 Aug. 26 

 Aug. 26 

 Aug. 26 

 Aug. 27 



Aug. 27 



Aug. 27 

 Aug. 28 

 Aug. 28 



Sex. 



Male . 



Male 

 Mm It- 

 Male 

 Male . 



Male . 

 Male 



18 Male .. 



19 Male .. 



Male .. 

 Female 

 Mule .. 

 21 Female 

 48 Male .. 



Female 

 Female. 

 Female . 

 Female 



201 

 202 

 203 

 204 

 206 



207 

 20N 

 209 

 210 



212 

 213 

 214 

 215 

 216 

 217 



218 



219 



220 



221 



Female. 



Female. 



Length 

 in milli- 

 meters. 



520 

 640 



530 

 630 



440 

 1,020 



520 



850 



540 

 900 

 650 



850 

 730 



890 

 900 



1,160 



Ventral aorta. 



Blood 

 pressure 

 in milli- 

 meters of 

 mercury 



38 



47 

 80 

 64 



100 

 57 



120 

 67 



Heart 

 rate per 

 minute. 



52 



Dorsal aorta. 





Blood 

 pressure 

 in milli- 

 meters of 



mercury. 



58 

 39 



Heart 

 rate per 

 minute. 



(?) 



(?) 



61 



57 

 52 



(?) 



Respira- 

 tory rate 



per 

 minute. 



65 



102 

 75 



Beginning pressure 45, 

 rate 24. 



Poor, irregular. 



Rate can not be deter- 

 mined. 



Poor. 



Old male off retaining 

 rack; died in a few 

 minutes. 



Poor. 



Spawned naturally. 



Spawned artific ally. 



After 6 minutes' pressure 

 66, rate 51. 



Spawned artificially. 

 Do. 

 Do. 



Spawned artificially; ex- 

 periment continued for 

 40 minutes. 



Spawned naturally; after 

 28 minutes' pressure 67, 

 rate56: experiment con- 

 tinued 42 minutes. 



Spawned artificially; aft- 

 er 23 minutes' pressure 

 7n, rate 50. 



Rate and pressure very 

 irregular. 



Old male off retaining 



nick. 

 Spawned artificially. 



Unripe; after 10 minutes' 



pressure 64, rate 72. 

 Spawned artificially. 

 Just ripening. 



Pressure fell rapidly. 



I !i -cainized, no respira- 

 tory movements. 



Dorsal pressure measured 

 first. 



Fresh male in finr flesh 

 and color. 



Dorsal pressure measured 

 first. 

 Do. 



A comparison of the experiments in this list, which may be considered as repre- 

 senting the results in normal animals, is interesting in several important respects. 

 The experiments of this class showing the blood pressure in the ventral aorta have 

 been selected and are presented below in Table III, from which it will be seen that 

 the mean pressure for the 26 examples is 74.6 millimeters of mercury. 



