| 词汇 | demersal |
| 释义 | BETA Examples of demersaldemersal isn’t in the Cambridge Dictionary yet. You can help! The case of striped red mullet is particularly clear because it is a demersal species with sedentary habits. Fish hosts are considered in taxonomic and ecological groups as follows : demersal, anadromous, small pelagic, large pelagic and elasmobranch. At that time pelagic fish stocks were relatively underexploited, especially compared to demersal (bottom-dwelling) fish resources. The results from both models indicate that demersal fish stocks are both biologically and economically overfished and subject to both biological and economic overfishing. At that time, pelagic fish stocks were relatively underexploited, especially compared with demersal (bottom-dwelling) fish resources. A major source of the decline in demersal fisheries is overfishing by trawl gear at a depth of more than 50 m since 1973. Oceanographic conditions that vary with monsoons affect surface dwelling and migratory small pelagic fish more than the bottomdwelling demersal fish. Hence, there seems to be little likelihood that sealworms, which survive transmission to large demersal fish, will subsequently be ingested by the definitive hosts. The level of exploitation of the offshore demersal stocks may remain moderate as long as trawling remains banned from these waters. Fish hosts are considered under the sub-headings demersal, anadromous, small pelagic, large pelagic and elasmobranch. The restrictions on future expansion of purse seines and deep trawlers helped restore the stocks particularly of demersal species. To be perfectly clear, the directed demersal fishery on the "target" species focuses upon demersal species. Both small pelagaic and demersal species are harvested. Oceanographic conditions that vary with monsoons affect surface dwelling and migratory small pelagic fish more than bottom-dwelling demersal fish. The smaller seasonal increase for longliners compared to purse seiners is due to the comparative biology of demersal and small pelagic fish. The demersal fish cost of major fishing gear is divided by the total standard fishing effort of that gear. These figures are indicative - rather than definitive - as the pelagic figures relate to aggregate fishmeal and oil exports, while the demersal data is for frozen and fresh\\chilled hake only. The range of banned mesh sizes is not positioned correctly, nor is it wide enough to allow a clear separation of pelagic and demersal fisheries. From Europarl Parallel Corpus - English The main fishing activities are trawling for demersal fish, nephrops and scallops with some seasonal trawling for pelagic species. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under the Open Parliament Licence v3.0 |
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