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Fish and ildlifo Ferric© 
©c q nolo ; *i c rs i i aboratory 
2725 ant lake Boulevard 
, iasMngtoa 
**■ 
Juno 3 , ,i 'F i. ! 
:rotvrob:- for tr. Chriatay and r. Carlson*. 
The r-ro: Tim for the exteas ion will not b® based upon a nro- 
dcterained itinerary, as dm the e«se during bh© period Feb. 2? 
to .Tune 15, since the general surrey has been cognleied and you 
will be working within art area of rattier indefinite extent. lo- 
ot ©ad, the ©xfl oratory and fishing activities will be flexible, 
being gilded by the current situation, Particular attention 
should bo given to the following general points! 
1. The Migratory aoreieat of tan crabs into deeper water 
in Bering 3ea and in the hhtmgla araa; 
n 
*& * 
The chaage in. the physics! condition of the crabs dur- 
ing the mu mmr rontbs; 
5. The tendency, if say 
off shore ; 
for the crabs to concentrate age, in 
4. blie productivity per unit of fishing effort of the vari« 
our types of /ear during the aimer Months 
3. Xmrestip&tlon of new areas offshore which rluht mu -gort 
populations , !. . c . , ©round the ; riMlofs and around 'hmirah Island 
Doctor Sehr-itt has iuf'gest«f : - that we concentrate noro on 
tangle net fishing, and ho is anxious to find out what happens 
when Ion." lines of this gear are set out, as done by the Japan- 
ese. doctor tthnltt end ! are both interested In deter- ti tl * * 
It c mb - v " found further afield thru ^>u3.d be (wr'-actad frm. 
the •: Igratior. fro ' the onln: : ula, tliat is, are the crabs around 
- 
ruction --.-re they wot in/. The following yenersl procedure , there- 
fore., is suggested : 
ear in,*, latch ’.{arbor, try to pick, up the crab population 
Eigrating from the general Black hill— J-ort roller area, try to 
follow its sow sent , end deter- : in© the prodo.cti.irJ ty of the jewsr 
under varying conditions of operation, using el"' the tangle net 
