ALASKA FISHERY AND FUR-SEAL INDUSTRIES, 1920. 133 
after hatching burrow in the mud of the river banks and live like 
earthworms for an indefinite period of two or more years. After 
this they pass out to sea when some 6 inches long, and spend the 
remainder of their life in the ocean. So far as known to the 
writers, the lamprey scars have been found on salmon exclusively, 
and on the Yukon never on chums or dog salmon. Some king 
salmon would have two or even three scars and one was found on a 
sockeye, but among the thousands of Yukon chums that we in- 
spected there was not one that had been attacked by a lamprey. 
It is an interesting question whether the Yukon lampreys follow 
the king salmon of their own river on their feeding grounds and’ 
prey on them. It is not known that their attacks are ever dan- 
gerous. The salmon observed seemed in no case to have been 
seriously injured. 
That the king salmon ascend the Yukon at a high rate of speed 
has been accepted generally. An attempt was made to secure re- 
liable records of their first appearance at a large number of localities 
along the river. Wireless messages were sent to a number of points 
during the early days of the run before the dates should be for- 
gotten. And, in addition, a number of important records were 
secured during visits to the fishing camps, some of these giving the 
catch in detail day by day throughout the season. While it is 
recognized that the capture of the first salmon of the season at 
different points along the river may vary within a day or two in 
relation to the beginning of the run, an examination of the data 
indicates that this source of error is not serious and that reliable 
conclusions concerning the rate of travel can be drawn from the 
table presented. In this table, when two or more records have been 
obtained from the same locality, the earliest has been selected as 
giving the first appearance of the king salmon in that portion of 
the river. 
DATE OF CAPTURE OF First KING SALMON AT LOCALITIES ON YUKON RIVER, SEASON 
oF 1920. 
Approxi- 
: mate 
Locality. Date. aistaries 
traveled. 
Miles 
DORIELEN ON UN OP DLV OL ie aiatiararate 272 /= cin acbrem scare =) aynta/aSiaereyore aie \n, 5) stale s’aye alejalese(e,n a-cielweisa antes aise MUNG Sis. sees 
RTEIOAINS SOUL TOMES laca.sen ace cece someones Mets coerce doe wo ceninon cabeueeenes June, 15.) Sees 
LETH RUE Glnle Sek eae POO E MeL Iee ee aap cine CE aa eee ae Em Aare ae June 20 107 
WES LEED bel em te me a a Ae St ae cel Gt ei ee eae ees ae bstegh (OC meters 144 
RUT SSi aRMNTSS] Ola tee eee 52 Sots accra fa seer eet ae sceee k aeclarsg Soe e et ee June 21 204 
PUCK OMSHish Can Daan eset cate ce ce seine cm cdot acismeneacme aes sedan oc aeleche nomearaate June 23 221 
TEST Cri rape Se eee Oy re Rs RS ee meee hbo eee eS eA Eee Ee a ee oe June 22 259 
PET OL VINO ROSS Nee os eens en ete it nie at Ae oa aa ee ns aon ete das meas June 23 279 
Hause Apids, ADOVe Atk seme so Sei Sa pee hs ee See |June 24 346 
Campo milesibelow# Kaltes 34st .2% 6... -ae23) sass se ded e-seeans odes ee ees |June 27 440 
ITXC UETE : ah Nalnde Dat Stiney Then a eee Ss er ae Se eee RS Ss ae Ee. June 28 491 
Ini atl Bee ES SAS. hea EA Ae Ek eee eee ee eee an eres 5a7 oe tea eo ee ON | June 29 555 
WISE Creeks ApOVe WOldella! sic Sascbocce corencuuteeetn tee au ae ee cae dees |June 27 622 
LTE oe 5 - — Slants etn el a aie Scie ee a i areata So AS ak (ee idoute- 659 
Rava? eee See ee eee Es Day k srt BES oS iads ee a ee a tS June 28 804 
ish) Crock AD OVER AMPALL ADIOS 2 so. 0 occ c cet eee ne cee ceeec oooh oes ane setae ce July 3 851 
CLEGIG Se eres Sa Rae ten) eee AP RELY 2 SAS eee ee See eye ‘July il 1, 227 
Whunlic Crockett eae een ee eee ee Rg os ee ee eee ee Se July 12 1,317 
LOE G UE O. Seat oe Ie = a8 st A Re aes eae ee SESS OP eee ne July 13 1, 402 
ID GaVVOM: Sash: Cami sates a 5 eset cy Sree SLOT Sl SS eS ee en hee ce July 14 1, 478 
LS Sts 28s eee. BEC Cee es 5 En Pen ane Pen Re cee ieee mann es 0 1, 504 
