demersal

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The Management Plan bans a number of destructive and effective fishing methods, including explosives and poisons, reef gleaning, long lines, gill nets and demersal (bottom) traps, effectively restricting fishermen to using hook and line and traditional light nets.

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Definitions (3)

Toggle American Heritage definitions American Heritage Dictionary (2)

  1. adjective Dwelling at or near the bottom of a body of water: a demersal fish.
  2. adjective Sinking to or deposited near the bottom of a body of water: demersal fish eggs.

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Examples (9)

  • Shrimp and demersal finfish trawl fisheries account for over 50 percent of total estimated discards while representing approximately 22 percent of total recorded landings. —  Featured Articles - Encyclopedia of Earth
  • The Management Plan bans a number of destructive and effective fishing methods, including explosives and poisons, reef gleaning, long lines, gill nets and demersal (bottom) traps, effectively restricting fishermen to using hook and line and traditional light nets. —  Never Yet Melted
  • During a jubilee many species of crab and shrimp, as well as flounder, eels, and other demersal fish will leave deeper waters and congregate-in large numbers and very high density-in a specific, shallower coastal area of the bay. —  A Guy's Moleskine Notebook
  • It appears, in the light of the results obtained that the level of pollution by heavy metals in this part of the senegalese coast has not yet reached alarming limits. abalone abundance acanthophora acanthophora-spicifera acoustics adaptation ade4 africa age agriculture akaike algae allometry allozymes altricial ambi america amp anadara analysis animal anthropology aquaculture arguin artisanal asie assemblage assemblages assessment atmospheric australia baie bait banc-arguin barrage barrier bay beds behavior behaviour benthic benthos beta bibliography biodiversity biogeography biologie biology biomass biosphere birds bissau bivalves bivalvia body-size broken california camera captage carbon carcinus-maenas casamance catch cerastoderma-edule change chaos chemical chemistry cichlidae clams climate-change collapse community competition congo conservation contaminants convergent coral costa course crabs crassostrea crassostrea-gasar crevette croissance crossostrea cyprinidae cyprinids dams data-limited delta demersal density dependence depth design development didson diet diets digestive disease dissolved distribution distributions disturbance diversification diversity dynamics eaf ebrie ecological ecologie ecology ecomorphology economic economical-benefits economical-politics economics ecopath ecophysiology ecosim ecosystem ecosystem-health ecosystems ecotoxicology effect efficiency effort embryo emergy environment environmental epibenthic escapement estimate estuaire estuaries estuary ethmalosa ethmalose europe eutrophication evaluation evaporation evolution exergy experimental facteur-ecologique fao feeding file-import-08-12-08 fish fish-biomass fisheries fisheries-economics fisheries-induced fisheries-statistics fishermen-knowledge fishing fishing-impact flats flora focal-species food food-webs foraging forest forests france freshwater functional functional-guilds fuzzy-logic gambia gasar gasteropods gastropods gender genetic genetics geometric ghana gizc gracilaria-fisheri growth gryphea guilds guinea guyane habitat halibut haliotis-asinina health heavy-metals herring high-frequency huitres hybridization hydroacoustic hydrology hydropower hypersalinite ibi iczm identification imaging impacts indicators insect interaction inventory invertebrates island isotopes juvenile kempton keystone lagoon lagoons lagunes lakes larva larvae length-at-age length-weight life-history life-strategies limits loango logistic longitudinal longline macrofauna macrophytes maerl mali management mangrove mangroves man-made-lakes marine marshes marxam mass maturation maturity mauritania mediterranean mercury metals metamorphosis method migration migrations milieux model modeling modelisation models mollusca molluscs mollusques morphology morphometrics mpa multibeam multivariate mussels myticulture nearshore networks new-species niche noire nursery nutritional octopus ogive omc omnivory ontogenetic ontogeny organic-matter organochlorines orinoco overfishing oxygen oyster paleo-environment parasites parks participatory patterns pcbs peche perna persistence pesticides peuplements phenotype phenotypic philippines phylogeny plaice plancton plankton plant plants plasticity plots pnba pointe poissons policies policy politics pollution poorfish pot predation predators principal-components probability production productivity protection purse-seine q queensland radiation radio-tracking rainfall rank-abundance rarity rates rays rci reaction recovery reef reefs regression relative remote-sensing reproduction reserve reservoir ressources reviews rica r-project sablefish sahelienne saison-de-ponte salinite salinity salmon saloum salvador samoa sampling sanctuary sarotherodon saumtres scrobicularia seagrass seamounts seasonal seasonal-variations sediment segregation selection selingue senegal series shallow sharks shifts shrimps size size-spectra slugs small-dams sociological sockeye sonar south-africa south-america spatial spawning-stock species species-list species-selection sri-lanka statistics stick stratification stress structure tanganyika temperature theory tidal tilapia time-series toxicity tract traditional transitional-waters treatment trophic trophic-levels tropical tutorial types untb utilisation valorisation variability variation venezuela water waters west west-africa wfd with yield zambia zonation zone zones zoning zoobenthos zoogeography zooplankton CiteULike organises scholarly (or academic) papers or literature and provides bibliographic (which means it makes bibliographies) for universities and higher education establishments. —  CiteULike: Everyone's library
  • Although the precise impacts and direction of climate-driven change for particular fish stocks and fisheries are uncertain, our analysis suggests they are likely to lead to either increased economic hardship or missed opportunities for development in countries that depend upon fisheries but lack the capacity to adapt. abalone abundance acanthophora acanthophora-spicifera acoustics adaptation ade4 africa age agriculture akaike algae allometry allozymes altricial ambi america amp anadara analysis animal anthropology aquaculture arguin artisanal asie assemblage assemblages assessment atmospheric australia baie bait banc-arguin barrage barrier bay beds behavior behaviour benthic benthos beta bibliography biodiversity biogeography biologie biology biomass biosphere birds bissau bivalves bivalvia body-size broken california camera captage carbon carcinus-maenas casamance catch cerastoderma-edule change chaos chemical chemistry cichlidae clams climate-change collapse community competition congo conservation contaminants convergent coral costa course crabs crassostrea crassostrea-gasar crevette croissance crossostrea cyprinidae cyprinids dams data-limited delta demersal density dependence depth design development didson diet diets digestive disease dissolved distribution distributions disturbance diversification diversity dynamics eaf ebrie ecological ecologie ecology ecomorphology economic economical-benefits economical-politics economics ecopath ecophysiology ecosim ecosystem ecosystem-health ecosystems ecotoxicology effect efficiency effort embryo emergy environment environmental epibenthic escapement estimate estuaire estuaries estuary ethmalosa ethmalose europe eutrophication evaluation evaporation evolution exergy experimental facteur-ecologique fao feeding file-import-08-12-08 fish fish-biomass fisheries fisheries-economics fisheries-induced fisheries-statistics fishermen-knowledge fishing fishing-impact flats flora focal-species food food-webs foraging forest forests france freshwater functional functional-guilds fuzzy-logic gambia gasar gasteropods gastropods gender genetic genetics geometric ghana gizc gracilaria-fisheri growth gryphea guilds guinea guyane habitat halibut haliotis-asinina health heavy-metals herring high-frequency huitres hybridization hydroacoustic hydrology hydropower hypersalinite ibi iczm identification imaging impacts indicators insect interaction inventory invertebrates island isotopes juvenile kempton keystone lagoon lagoons lagunes lakes larva larvae length-at-age length-weight life-history life-strategies limits loango logistic longitudinal longline macrofauna macrophytes maerl mali management mangrove mangroves man-made-lakes marine marshes marxam mass maturation maturity mauritania mediterranean mercury metals metamorphosis method migration migrations milieux model modeling modelisation models mollusca molluscs mollusques morphology morphometrics mpa multibeam multivariate mussels myticulture nearshore networks new-species niche noire nursery nutritional octopus ogive omc omnivory ontogenetic ontogeny organic-matter organochlorines orinoco overfishing oxygen oyster paleo-environment parasites parks participatory patterns pcbs peche perna persistence pesticides peuplements phenotype phenotypic philippines phylogeny plaice plancton plankton plant plants plasticity plots pnba pointe poissons policies policy politics pollution poorfish pot predation predators principal-components probability production productivity protection purse-seine q queensland radiation radio-tracking rainfall rank-abundance rarity rates rays rci reaction recovery reef reefs regression relative remote-sensing reproduction reserve reservoir ressources reviews rica r-project sablefish sahelienne saison-de-ponte salinite salinity salmon saloum salvador samoa sampling sanctuary sarotherodon saumtres scrobicularia seagrass seamounts seasonal seasonal-variations sediment segregation selection selingue senegal series shallow sharks shifts shrimps size size-spectra slugs small-dams sociological sockeye sonar south-africa south-america spatial spawning-stock species species-list species-selection sri-lanka statistics stick stratification stress structure tanganyika temperature theory tidal tilapia time-series toxicity tract traditional transitional-waters treatment trophic trophic-levels tropical tutorial types untb utilisation valorisation variability variation venezuela water waters west west-africa wfd with yield zambia zonation zone zones zoning zoobenthos zoogeography zooplankton CiteULike organises scholarly (or academic) papers or literature and provides bibliographic (which means it makes bibliographies) for universities and higher education establishments. —  CiteULike: Everyone's library
 

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Etymologies (2)

Toggle American Heritage etymologies American Heritage Dictionary (1)

  1. From Latin dēmersus, past participle of dēmergere, to sink : dē-, de- + mergere, to sink.

Toggle Century etymologies Century Dictionary (1)

  1. Irreg. L. demersus, past participle of demergere, immerse, + -al.
 

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/dəˈmərsəl/
by American Heritage

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