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mon 20 
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Annexe C 
Rapport de l’administrateur de la Commission B 
Report of the Convener of Committee B 
A report on the comparative trawling experiments carried out in 1903 by 
the different research steamers in company with the S.S. “Huxley” was submitted 
to the meeting of the Committee held at Amsterdam in December last, and has 
been printed as an Annexe to the Procés-Verbal of that meeting. 
In accordance with resolutions of the Committee at Amsterdam, experiments 
on the transplantation of marked plaice (Pleuronectes platessa) were made during 
the spring of 1904 by several countries, but the results of these experiments cannot 
be profitably discussed before the completion of a full year. 
During June a special exploration of the spawning grounds of the sole 
(Solea vulgaris), and of the distribution of the eggs of this species, was made 
by the research steamers of Germany, Holland and England in the eastern, southern 
and south-western parts of the North Sea. 
Experiments with modifications of ordinary fishing nets were also recommen- 
ded by the Committee at Amsterdam, the collation of the results to be undertaken 
by the Bureau. 
The chief work carried out by myself as Convener since the Hamburg 
meeting has been the preparation of material dealing with the biology of the 
plaice (Pleuronectes platessa) for an interim report to be submitted to the Bu- 
reau. At the time of the commencement of the international investigations, there 
was little exact knowledge as to the migrations of plaice, and as to changes in the 
geographical distribution of plaice of different sizes at different seasons of the year. 
With the assistance of the members of the Committee, I have therefore made it 
my first task to obtain as much material as possible to throw light on these 
subjects. 
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