PROGRESS IN BIOLOGICAL INQUIRIES, 1939° 
By ELMER Hicerns, Chief, Division of Scientific Inquiry 
[With the collaboration of investigators] 
aan 
CONTENTS 
Page 
repOGuiculOnerener ns oo ee ee a 
GB et OUP mt er ee Se ee ek eee 3 
Ub lcatiOn seem ses sa. 2k Set ee Seek Se SLE eee 3 
INontheAGlantienisheny investigations: -=—==2225_2-" =- teeth 2 jl 6 
IW leyolke era |e SCS ee Se ee eee el ee eee eee Me ee 8 
leleolalayele. Spey ee ae 2 ee ee ee eee een eee oe oS 11 
OUNCE Lee eee eee tn eee ee kc SL ee 15 
Andivsis ofseroungush abundances- 2.22412 oti fl i es We 
WObsten= Searls Five sees ett ade ee sees te a ee ee 21 
Middle and South Atlantic fishery investigations._____________________- 23 
DSHORCHIS NCS aps == eee eee eS 8 es 24 
ANAC OMOUSRISH CS ies lan meee Nene eed DS. SA eee oe ae eee 24 
Basheriestor south, Carolina 72-01 ek sie TS Leslee ee 26 
Suifolke County cooperativeimvestigations 2-922 2 °___-__ 2h eee 2 
Shim PP MVeSt ea ilON See a= en ees ee Se 2S ee 29 
OlisShoOneko pera vlOns= === == Se = ae eee ees eee 30 
HALES STOEL FSUGING UVES SL SE a eel 2 oe ES ag = 31 
North Pacific and Alaska fishery investigations. _____.__________--__---- 33 
SOhumlo TA mkuiy Giapasaaeye see) Der ie eek lt. os Se anes 33 
(Celag Salmon 5 ee HN ee eS ee eee ee 2 pees 36 
SUES, GSAS kina ENC ee ae Seis i ee eee Ne aM 
IB TIStoleh tyasalmenshsheneste= 22) eons lk) > ee eee 38 
Kearluigsinermedssalmontr a saae Oop 5 fe 502) 1. eee 41 
ID oN Wena ein (aol ok ee ee ele eee 43 
icone ewer a ew Sy se es a 44 
Maskrrsalinonrs ta tistiCs= teen aes 2s ke 46 
jel@meatiy af oes Ee 8 oe ee oe Se neers a eI 47 
PAcinc pilcharduinvesticationcs sa suew sel Fe MS. i eee 49 
NiLUIdies Lor ApUNd an Cem mete tenes 8 Se ea) ee ee 51 
NO CHROOT O Wilt eaee eee Sa Sys Tk. 2 LS 51 
Senna oe 2 en ee ee 52 
anivaitegnistoly == see = eee sta EY re 53 
Conditionzofsthemesouncems settee ee! IES Bit a ee eee 54 
Greaisbakestisheryenvestioapionse -— 24. = 3. 7. 2) ee ee nD 
ihishervastatisticS= meee = 4 eee. 2! See mre oP ae 57 
Redelrakesnmvestigationes222=— 22-22 bs eee 57 
Micrationvot hakesVvirchicanmsishes 29...) 1252s see eee eee 59 
ASEPANOOETG Will, Sitcremens et e730) 0 ss ls Eh a Ba 60 
Cooperative investigations of Wisconsin lakes__________--------------- 61 
Shelifishpinvesticat Oncmpeemere see! eee Payee ae 63 
Oveter-cultureistudicomeuemes = 2 LS ee 63 
Hespirauionron Gheroystens. = 2... . 2) 2 ee eee 69 
Ovsterspestsrandyparasitesiss £0103. Ui SSSR ee see he ee 70 
Effect, of ‘pulp-mill pollution, on oysters-2- _=3.552 242 -sSue ee be, 
Bootigre-tsierys Investeaiionee .- 6 3 ee a ee 73 
1 Administrative Report No. 39, Appendix I to Report of the U. S. Commissioner of Fisheries for 1940. 
Approved for publication May 13, 1940. 
tee III 
