from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Dwelling at or near the bottom of a body of water: a demersal fish.
- adj. Sinking to or deposited near the bottom of a body of water: demersal fish eggs.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. That lives near the sea bed and lake bed
from The Century Dictionary and Cyclopedia
- Having so great a specific gravity as to sink in water: said of fish-eggs.
According to Natural England, "landings of demersal fish, particularly cod and haddock, have fallen by more than 50%" in the decade up to 2007.
As cod is demersal (i.e., a near-bottom fish), it is not likely to migrate north of the Barents Sea and into the deep Arctic Basin.
In the Pechora Sea, where there is no traditional demersal fishery, changes in zoobenthos biomass in 1924, 1958 to 1959, 1968 to 1970, and 1992 to 1995 show a negative correlation between zoobenthos biomass and temperature .
A study of demersal fishes and fisheries of the northeastern Pacific Ocean.
The composition of demersal ichthyocenosis in the western part of Bering Sea in November, 2002.
With the increasing effort and efficiency of the international distant water and local fishing fleets, cod catches in Icelandic waters increased to peak at 520,000t in 1933, while the catch of other demersal species increased to about 200,000t (Fig. 13.8).
After the Second World War, catches of demersal fish from Icelandic grounds increased again.
Because of the very strong 1945 cod year class and good recruitment to other demersal stocks, the exploitation rate of cod and other demersal species remained at a low level, although almost 50% higher than during the late 1920s and early 1930s.
Historically, demersal fisheries at Iceland and Greenland fall into two categories: land-based fisheries conducted by local inhabitants, and those of distant water foreign fleets.
A successful fishing policy of this kind should ensure an increase in the abundance of many demersal fish stocks by around 2030.
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