demersal


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demersal

(of organisms) living on or near the sea bottom, beyond the tidal zone.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
Hard stratum, composed of high-relief outcrops, was occupied by a diverse range of demersal fish species dominated by small rockfish species.
In response, the Japanese appear to be targeting Canadian Pacific hake, Chilean jack mackerel, and various Argentine demersal species.
Demersal fishes at high latitudes support some of the most lucrative fisheries in the world.
In groups such Eastern Pacific bonito, mesopelagic fish and demersal fish, the main source of mortality is predation (M2) exceeding 90%; the coefficient of other mortalities (M0) is important in sardine and swordfish, also about 90%.
It is among the most productive ecosystems in the world (Cushing, 1971) and supports several commercially valuable pelagic and demersal fisheries.
On fishing, the report said there could be a "large impact" at the southern trench on trawls for shellfish and demersal fish due to restrictions.
The survey revealed that the demersal fish stock is vulnerable to high deterioration; the Hamour (Orange-spotted Grouper) and Farsh (Painted Sweetlips) have witnessed a significant decline to 10 percent of their adult (reproductive) stock size and are overexploited by up to five times the sustainable limit.
Senegal is said to have demersal trawlers, fishing vessels that have huge funnel-shaped nets that are dragged along the ocean floor in order to maximize catch, including plants and animals that make up the habitat in which fish live and reproduce.
The quantity of demersal fish landed reached 68,924 tonnes, an increase of 27.5 per cent over the end of 2017 when it was 54,046 tonnes.
Pakistan's marine fisheries are diverse, with almost 250 demersal fish species, 50 small pelagic, 15 medium-sized pelagic and 20 large pelagic fish species.