40 

 Plaice, Pleurmiedes platessa. 



Investigations in 1904. 



Tab. G. gives a view over the catehes of the plaice eggs and youug in 

 1904.' The two first parts of the Table, which deal with the eggs and pelagic 

 youDg, are taken from the siimmaries for 1904 (see Tab 2 aud Tab. 3 B.) For 

 the eggs, I have only stated if they were found (-|-), or sought for with the pelagic 

 net but not fonnd (h-). For the pelagic young, it is stated both how many were 

 taken each month in each separate region in intermediate hauls with the young- 

 fish trawl and how loug the hauls lasted. The third portion gives information on 

 the occurrence of the bottom-stages in the various regions. 



Tab. G. Plaice eggs and young 1904. 



Plaice eggs. Pelagic net 



(-|- .= eggs found, -~ =3 eggs sought 



iov, but not found). 



January 



February 



March 



April 



May 



Pelagic plaice young. Young-fish trawl 

 in intermediate lavers. 



March Nr. ofminutes 



!■ plaice young 



. ., Nr. of minutes 



P" » plaice young 



,, Nr. of minutes 



Mav , . 



» plaice j'ouDg 



^ Nr. of minutes 



■> plaice young 



Bottom-stages of plaice. Shove net 

 (-)- = found, -^ = sought for, but 

 not found). 



April 



May 



June 



July 



August 



September 



+ 



CO 



+ 



270 

 O 



35 

 31 



60 

 O 



03 

 t4 



715 

 O 



190 

 16 



170 

 1 



245 

 1 



+ 



70 

 O 



30 

 O 



+ 





+ 



+ 



+ 



42 

 2 



50 

 O 



275 

 10 



115 

 O 



+ 



pa 



20 

 5 



160 

 O 



+ 

 + 



'cq 



+ 

 + 



90 

 1 



170 

 103 



130 

 2 



2";? 



2 » 



.•-m 



+ 



85 

 O 



120 

 O 



Pelagic eggs of plaice were found in 1904 in the mouths of January, 

 March and May. In January we searched for them only in the Great Belt and 

 true Baltic, but found them in both regions though not in great quantity. In 

 February no investigations were made. In March the plaice eggs were frequent 

 everywhere. On the otiier hånd we found none in April. Our investigations in 

 April in the Skager Rak, northern Kattegat and Lim Fjord were made at the end 

 of the month; pelagic eggs were numerous but none of these were of the plaice. 



Plaice egg.s must all be hatclied out before the end of April in our northern 

 waters. It is differeut however in the western Baltic. We made no investigations 



