32 MIGRATION OF ADULT SOCKEYE SALMON. 
TABLE 20.—DisTANcES IN Pucet SounpD FRoM MARKING STATIONS TO REGIONS 
WuHere FisH WERE TAKEN.@ 


Station. Region.| Miles. Station. reeioe’ Miles. Station. Region.| Miles. 





1 35 1 15.5 1 62 
2 47.5 Dg Rei 2 59.5 
3 BT 3 15.5 3 62.5 
4 45 4 35 4 35 
Avi Seay 5 52.5 5 a fal Dace a ie LP 5 35 
6 BO} Creeks. weeds 6 20 6 45 
7 71 7 33 7 35 
8 83 8 45 8 20.5 
9 92.5 9 59.5 9 NS cee 
10 122.5 10 89.5 10 30 
iy eee 1 33.5 
2 15 2 28 
3 21.5 3 29.5 
: 4 17.5 4 51.5 
Bittle 5 Gee) Tye” FEN 5 41.5 
6 21.5 6 13 
7 33.5 ieee eae 
8 47.5 8 11.5 
9 62 9 27.5 
10 92 10 57.5 

a As it is obvious that the majority of the fish pass through Rosario Straits, the distances, wherever 
applicable, have been measured over this route. 
TABLE 21.—NUMBER OF SPECIMENS MARKED AT EACH STATION TAKEN IN EAcH 
REGION AND RATE OF PROGRESS IN MILES PER Day. @ 








A B C D Be} A B C D E 
| 
Region 1: Region 7: 
MIST Sey Se ote ete 12 49 23 7a eee WISN ceceee ree 32 35} 21 11 4 
Raterec aacecs LP AG (See SP 4 SHON beaseac Ratessniseose- Te eh don! lO. On eee 4.4 
Region 2: Region 8: 2 
PASH Siete eles 16 29 34 Dieccace Hishyecce exe | 25 58 48} 131 14 
Ratezecacesess py Sis) pene SSC eee Rate eeeee cuss } 11.1] 10.3] 8&3] 4.6 3.2 
Region 3: Region 9: 
Mish fe poe esd cele tae Bel as aelee oe Rishis £3595. 13 49 28 | 109 27 
Watet s+. 52. ss|-2as. al asosee BF Ae eee |e et Ratess 283300 1258), 11.. 55). S951) 10; 23s 
Region 4: Region 10: 
Wish ms sees of 1 4 Sule cote alaacece ish se 14 54 20 35 166 
Ratesss=-: sess 2255)'). SsOlMnvessO eT. Cee. a Raton -2eick 11.7] 14.6) 86] 6.8 4.5 
Region 6: 
2 tel oe ee 23 25 ASG ee 1 
Rates: s2< 2 10C8 | Oso aioe lease 11.2 




a No specimens were taken in region 5. 
Table 21 gives the results of these calculations of the rate in miles 
er day, together with the number of individuals on which the calcu- 
nae are based. From this has been calculated the mean rate of 
travel. In doing this all cases have been omitted which were based 
on (1) less than 10 individuals, (2) a distance traveled of less than 
20 miles, and (3) a retrograde migration relative to the mouth of the 
Fraser River. This has been done to exclude, as nearly as possible, 
all abnormal figures. With these exclusions there remain 19 cate- 
gories on which to base the final conclusions as to the rate of migra- 
tion. The data for these 19 categories are given separately in the 
following table: 

a For this and other similar means the “harmonic mean”’ recommended by Yule (An Introduction to 
the Theory of Statistics), Rugg (Statistical Methods Applied to Education), and others, for the caleu- 
lation of mean rates based on units of work, has been used. ‘The harmonic mean is defined by Rugg as 
‘the reciprocal of the arithmetic mean of the reciprocals of the individual measures of the series.” 
