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CONTENTS 
INTRODUCTION ne es cut tena nee ccs areas anne ele ee nie ee 
Fluctuations in the yield a characteristic feature of all great fisheries ................. 
Norvesan Cod, GENOMES ooovcocccceeaveccoucsnecc SO D eee CROIRE 
NOTE ST AM ARE LCI EM IISIE VAN RS ME Pre crete et ARE ARE RL NT TAN ae et 
Pour atiempts to Cxgolevin WNe MMCUAUTOMS à: 0006 c000cbco00deodoabcoddocoovoooce 
The) theory (of migration as a cause of the fluctuations "A 
Probable extent of migration essentially reduced by scientific investigation. ............ 
Investigations as to the distribution of the fish in the Norwegian Sea................. 
Principal species only found on the coastal banks in spawning time................... 
A considerable portion of the stock annually taken by the fishery .................... 
Preliminary investigations as to the cod fishery in northern Norwegian waters, 1900—1903 
Methods of age determination adopted in the investigations ...................,....... 
DNepnesentatiyeßb\olosicalgorsvitalestatıstieseg RENE PE EE ET TE 
CHAPTER I 
The Herring Stock in Norwegian coastal waters ....................................... 
Norwestany Herrins: Misheries’s u... ee ne uate ee ae se One oe een RS 
Popular classification of the different varieties.............---.2--- eects eee ete eee eee 
Size of the herring, and determination of age by means of measurement .............. 
The Scales of the herring as a means of determining the age and growth of the fish... 
AVORE SiO Où Une nearing AL CMRI, AGES oocaccccacccuacovovcadonedouovcaboooecas 
Crowthatditfenentiseasons OT WING VERTE PE Er EEE CPE ETC PE Ce 
To smell horde eral ner TOP ME Eee octateccasecopobeccooodocobocoocetocee 
Te at Ineracine ancl MINA, TOP HAMO sc cc00000000000v080000000060000000090a00000000 0 
Year class 1904 among fat herring ................... er seared gee PR RNS ok: ERP CR ICE 
Year class 1904 among large herring and spring herring.............................. 
Comparison of different samples as a means of checking results....................... 
Recruiting of the spawning shoals from those of the fat herring...................... 
Recapitulation. Sketch of the natural history of the herring ......................... 
1e notations où the Inman gischen OOS 
ASSOLLMENT OMAN ET CINE ed te Ur e SC Le CRT CC CL 
incitations ii Une tai hontine MINOR oo So 000000800009606200000000000v000000o000o00u0 
UMCHTATIOMS in tne Wreraint, Où Some MO 06000 00000-o0000000000050a0du009000d 
Fluctuations in the yield of the spring herring fishery ............................... 
CHAPTER II 
The Stock of Herring in the North Sea and Skagerrak ................................. 
Te Inlenting hey tin ine Nono Se arseevae ld 
Driftene san dira eens reise Arne ee Ohio rests ees A Re CR eee le citroen ee UT 
Sedsonalevaniationsofathepfishenya...sesene ER TE ee uso meme epee Renee LOUE NT 
Difference of opinion as to the migrations and race of the herring.................... 
InIGINCKe'S CLISICATOM OH WHS WAGES Ol MAME. .6cccc0csccx0ccce0a000000 0008000000000 
Mixturenoß, Racessinsthe"Northr,Sea RE TEE Ce de M nel Lav os) Dee Ge 
Mixture of races in the northernmost part of the North Sea ......................... 
ROGNS WAVESHTEANIOMS AS WO MEME Korn a Ce SEE ao 
Intesnationalestudiesgasktogagse Band ERA à oocaccacogosso00Gcancnsn0ccuccudacaa GED 
Geographical distribution of the different age eroups................-.....-.++------:- 
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