little more thau a fathom long. The pole maintains a vertical position in the 

 water by baviug an iron weight on its Iower end with some glass air-balls on the 

 upper. By towing tliis pole along the bottom in a crowfoot, the net is ahvays 

 about a fathom's distance from the grouud. When the tables indicate horizontal 

 hauls with the pelagic net a fathom's distance from the bottom, that alwaj'-s means 

 hauls with the "pelagic net on a pole". The horizontal hanls with the pelagic 

 net are continned to the surface on pulling in. The duration of the haul, given 

 in the table in minutes, is the time occupied in fishiug at the depth indicated. 

 In the column for the duration the sign 1 denotes the vertical hauls. 



The pelagic fisk eggs were couuted immediately after the haul was made. 

 The numbers are only approximate except in the case of the vertical hauls. The 

 determinations were made on board, sometimes by letting the eggs hatch out, but 

 usually by a rapid microscopic examination. We have tlierefore not been able to 

 determine every single egg, but have restricted ourselves to noting the species we 

 recognised without too close investigation. 



As a matter of fad, our attention has heen mostly directed to the capture and 

 determination of the young fiskes. The methods for the capture of these have been 

 greatly improved by the Director even during the progress of the investigations. 

 Petersen's young-fish tratvl has been constantly used and we have made horizontal 

 hauls with it at varying depths. When using it at or near the surface, we 

 fastened an air-bladder on to tiie upper part at its centre. When u.sing it deeper 

 down, so far as possible at a certain depth below the surface, we made a line 

 fast to the centre of the upper part and tied a buoy to the end of the line. The 

 buoy was thus able to support the trawl and yet remain on the surface when the 

 »Sallingsund« was moving. In this way we know at any rate, that the trawl did 

 not go deeper than the length of the line, in faet scarcely so deep, as the line 

 was towed a little obliquely in the water. We could not use this method however 

 in fishing close to the bottom, as we ran the risk of the trawl touching the ground, 

 and thus of the pelagic catch being covered over and destroyed by bottom material 

 and larger fish. It was tlierefore a great gain to the investigations when the 

 Director coustructed the so-called "young-Jish trawl on hlocTis". Below each of the 

 poles, to which the body of tbe trawl is attached, is fastened a block. This is 

 composed of a tin-plate cylinder with a circular disc of wood at each end. The 

 diameter of the woodeu discs is ca. 20 cm. and the cylinder has the same height. 

 The blocks are tlierefore hollow. A iiole is bored in each of the discs, so that the 

 water enters the cylinder when the blocks sink under the surface and Hows out 

 again as soon as they are brought in. The blocks are fastened to the trawl by 

 passing the poles through the cylinders. The underpart of the trawl can now be 

 be made fast to the poles at any distance great or small above the blocks; even 

 if the trawl is fastened just above the upper edge of ths jjlocks, it can usually he 

 towed over sandy or stoney grouud without taking in any bottom-material. 



On Tab. 1 is given the approximate depth at which each liaul of the 

 young-fish trawl was made. When this depth is noted along with the deptli of 

 the station, this means as a rule that the trawl was used on the bottom with the 

 blocks. Hauls on the bottom without blocks on the trawl are only exceptionall}^ 



