Explanation to the Chart of the Lim Fjord Oyster Banks. 
1907. 
The places marked in black indicate where so many oysters are to he 
found that it would pay to dredge for them, or where they have been in quan- 
tities to attract notice; scattered oysters are to he found everywhere between these 
so-called »banks«. I may however remark that practically no oysters are to be 
found in the most western part of Nissum Bredning, nor in the north-eastern part 
of Løgstør Bredning, the reason being assuredly that the sand bottom here is too 
movable and barren. The reason why they are not found outside the sand bottom 
in the north-eastern part of Løgstør Bredning is perhaps that the vegetation here, 
especially of Zostera, is so rich; for the same reason but few oysters occur in the 
waters between Jegindø and Visby Bredning's southern portion; further in Louns 
Bredning and Skive Fjord the salinity is too low for oysters; this applies also to 
the narrow eastern Lim Fjord, east of 'Troldholmen, which is therefore omitted 
from the Chart. With these exceptions oyster banks are to be found everywhere 
in the Lim Fjord along the beach in the neighbourhood of »Skaaret«; they are 
present close in to the land in 2——3 feet of water and they go out to deeper water 
of 3—4 fathoms, but as a rule they do not go far from the 3-fathoms line. This 
is at once evident from observation of the Chart. The reason for this certainly is 
that out on the true deep clavy beds, which form the bottom of the Lim Fjord, 
the ground is too soft and the clay or mud too shifting for the oysters. As ex- 
ceptions to this rule may he mentioned the large bauks to the west in Nissum 
Bredning, to the north-east in Thisted Bredning and in the north-west of Løgstør 
Bredning. The bottom must he of a special nature here to make it possible for 
the oysters to live at these deep levels. 
