APPENDIX F: HENKING _ lo — 



(1) the presence of weakly saline coastal water with the Atlantic water of high salinity 

 further out, 



(2) the mingling of northern Atlantic water with more southern Atlantic water from 

 the Channel, 



(3) the variations in temperature, and lastly 



(4) that the strong tidal currents in the south, gradually change over into tidal rest 

 in the north. 



The extent, to which fluctuations in the stock of fish occur, may be seen from the 

 following summary. The material used for 1902 comes from 869 voyages (of steamers) 

 of 6,615 days duration, and for 1903 from 869 voyages (of steamers) of 6569 days 

 duration. 



1. Haddock. The average catch per day over the whole year amounted to: 



1902 1903 



I sort 16374 pounds 104-82 pounds 



n „ 116-05 „ 118-35 „ 



in „ 259-22 „ 378-62 „ 



IV „ 190-43 „ 587-50 „ 



It may be remarked generally, that the IV [sort represents a mixture of small haddock, 

 whiting and, in inconsiderable quantities, small cod also, and is consequently better left 

 out of consideration. 



For both years, 1902 and 1903, two distinct maxima occur: a very high maximum 

 comes in July — September for all three sorts, then a rapid fall is succeeded by a small 

 rise in November, whilst a period of good hauls especially for the larger haddock, occurs 

 in January (1903), February (1902). 



A well-marked and distinct depression then lasted for three months, from March— May 

 in 1902, February to April in 1903, and a further three months for the larger fish, in 

 1903 from October onwards and in 1902 from November onwards. 



The distinct minimum for 1903 thus occurred at the same period as the inflow of 

 the southern Atlantic water of high salinity. 



2. Whiting with an average in round numbers of 



1902 1903 



239 pounds 132-28 pounds 



may -be left out of account here, as it is mixed with the IV sort of haddock. 



3. Cod. The average daily catch is: 



1902 1903 



I sort 1 14-46 pounds 96-36 pounds 



II „ 223-83 „ 215-96 „ 



338-29 pounds 312-32 pounds. 



The cod has a very distinct depression at the same period in the both years, namely, 

 in the summer months May (1903) June (1902) to September — October. It is well-known, 

 that the cod often reappears in great shoals in October — December. From November to 

 March — April, the catches were well over the average (see Fig. 15, 16, p. 25). 



