960 



SCANDINAVIAN FISHES. 



Averntres in the Baltic Herring (.S"(r 



ng; Clupea karengus. 



Nnmbcr of specimens incajured 



Length of the body from the tip of the lower jaw to the end of the caudal lobes, expressed in iiiillinietr 



Distance between the dorsal tin and the tip of the lower jaw in % of the length of the body 



,, ., ,, ventral fins „ ,, ,. ,. ,, „ „ „ ,, 



„ „ ,, pectoral tins ,, .. ,, ,, „ ,, ,, „ ., 



Depth of the body behind the tips of the pectornl tins „ „ 



Thickness,, .. ,, „ ., ,, ,, ,. ,. ., »» i. 



Depth ,, ,, „ „ „ „ „ „ ventral „ „ „ 



Length of the head ,, ., 



Horizontal diameter of the eye m it 



Vertical ., ,. „ v ?• 



iDterorbital width t. «« 



Length of the snout .-- <, „ 



„ ,. upper jaw „ „ 



„ „ „ lower ., ,, „ 



„ „ ,, base of the dorsal iiu ,, „ 



,, ,, ,, pectoral tins „ „ 



„ „ „ ventral „ „ „ 



,, ., ., base of the anal tin „ „ 



111 vain do we seek here for any noticeable dif- 

 ference between the sexes. All the |)ercentages are the 

 same in both columns, except in two instances. The 

 depth of the body behind the tips of the pectoral fins 

 and its thickness at the same point are somewhat greater 

 in tlie males than in the females. This difference, how- 

 ever insignificant it may appear, is of economical im- 

 portance, and had in Nilsson's opinion a zoological 

 importance as well. Greater depth and thickness com- 



bined invoh'c greater fleshiness and greater value even 

 to the epicure. The most important difference adduced 

 by NiLSSON between the Norwegian Summer (Autumn 

 or Fat) Herring and the Norwegian Spring (Gray-boned°) 

 Herring, also consisted in the relative depth and thick- 

 ness. The same difference appears too between the so- 

 called Autumn StrSmming and Spring StrOmming, on a 

 calculation of the averages for these tw'o forms, as far 

 as thev have been distinguished, in Lundberg's tables: 



The difference is indeed slight; hut here as in th.e 

 preceding table, its course is opposite to that of the 

 changes of growth in the Herring, and it is therefore 

 not without importance. The Autumn Stromming too 

 generally finds a better market than the Spring Strom- 

 ming. NiLSSON remarked this difference between the 

 Kivlk Herring and his Stromniing. 



Exactly the same distinction may be traced, how- 

 ever, between different takes of the same Herring- 



shoal, netted at the same time, in the one instance 

 farther from land and in deeper water, in the other 

 nearer shore and in the shallows. This I have shown 

 in iny report to the Swedish Home Secretar)' on the 

 experiments in drift-net fishing carried out under my 

 supervision in Bohuslan during the winter of 1880 — 

 81. l-'rom the measurements taken by Mr. Trn'BOJi, 

 Assistant Inspector of Fisheries, I calculated the follow- 

 inff averages. 



" The word in the original (grabenssiU) really means, according to Ljungman, ijrofbenssUl, i. e. coarse-boned Herring. 



