33 - 



APPENDIX E: HBINOKE 



the maximum at 19 cm. and further, the latter also from the Il-group with a maximum 

 at 26 cm. The shallow depression at 30 cm. seems to indicate the boundary between the 

 II- and Ill-groups, with the apex of the latter at about 32 cm. From this, the haddock 

 taken in July of 3 to 10 cm. in length, would be 2 to at most 6 months old (0-group), 

 those of 14 to 21 cm. 14 to 18 months (I-group), and those of 23 to 27 cm. 26 to 30 

 months old (Il-group). (2) In November, the size-groups are essentially different. The curve 

 (III) clearly shows a very deep depression at 20 and 21 cm. and another shallow one at 



ijrp 



1. 100 m. line. Heligol. trawl. 287 spec. 



10. July, 1904. 

 II. lOOm. line. L. 90 ft. trawl. 990 specimens. 



10. July 1904. 

 Til. Northern North Sea. Large and Heligol. 



trawl. 559 spec. Mid Nov. (1904. 

 0-,J- Ofp O-group, I-group (of the first, second years). 



I Grp 





X-^r:--.. 



Eig-. 4. Analysis of catches of haddock in the northern North Sea, according to length and 

 number. Percentage curves. 1836 specimens altogether of 3 to 50 cm. in length. I und 

 II were made — in July, 1904 — at the same place, one after the other (58° 0' N. L. — 1° 10' E. L. 

 100—134 m.), the first mth the Heligoland young-fish trawl, the second with the large 90 ft. trawl. Ill is 

 composed of 4 different hauls made, from the 10th to 22nd of November 1904, at different parts of the 

 northern North Sea in 64 to 100 m., partly with the young-fish trawl, partly with the large trawl. 



27 to 30 cm., also 3 distinct maxima at 17, 26 and 33 cm. It is certain, that the first 

 maximum at 17 cm. represents the 0-group, which have thus grown, on an average, from 

 10 to 11 cm. in the four months from the middle of July to the middle of November, 

 therefore very considerably. The maximum at 26 cm. may represent the 1-group, which 

 have therefore grown about 7 cm. on an average, in the four months. Whether the max- 

 imum at 33 cm. represents the size of the Il-group must remain uncertain. (3) The 

 0-group in November and the I-group in July are relatively but little distant from one 

 another as regards average size, namely, only about 2 to 3 cm. 



Although it is certain, that this separation of the various age-groups in July and 

 November will have to be altered on further more exact investigations, especially the posi- 

 tion of the minima and maxima of the curves, some correct conclusions may yet be drawn 



-Vtipenilix E ^ 



