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Ensis directus   Conrad, 1843

American jack knife clam

Native range | All suitable habitat | Point map | Year 2100
This map was computer-generated and has not yet been reviewed.
Ensis directus   AquaMaps   Data sources: GBIF OBIS
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Image of Ensis directus (American jack knife clam)
Picture by Harvey-Clark, Chris

Classification Common names | Synonyms | CoL | ITIS | WoRMS

Bivalvia | Veneroida | Pharidae

Main reference References | Biblio | Coordinator | Collaborators

Harvey-Clark, C. 1997. (Ref. 7726)

Size / Weight / Age

Max length : 26.0 cm TL male/unsexed; (Ref. 7726)

Environment

Benthic; brackish; depth range 0 - 73 m (Ref. 104365)

Climate / Range

Temperate; 46°N - 18°N, 91°W - 59°W

Distribution Countries | FAO areas | Ecosystems | Occurrences | Introductions

Western Atlantic Ocean: from Nova Scotia, Canada to Florida and southern Gulf of Mexico to Campeche, Mexico. Introduced in the Northeast Atlantic from UK (England and Wales), the North Sea to southern Norway and southern Baltic Sea to Spain in the southern Bay of Biscay. Tropical to temperate.

Biology     Glossary (e.g. epibenthic)

Comprise communities and assemblages throughout the Mid-Atlantic Bight (Ref. 80354). Inhabits littoral and sublittoral sediment (Ref. 1314). Found in areas influenced by estuarine outflows (Ref. 96507). Swims backward (Ref. 80328). Members of the class Bivalvia are mostly gonochoric, some are protandric hermaphrodites. Life cycle: Embryos develop into free-swimming trocophore larvae, succeeded by the bivalve veliger, resembling a miniature clam (Ref. 833).

IUCN Red List Status (Ref. 114614)

   

CITES status (Ref. 94142)

Not Evaluated

Threat to humans

Human uses

Fisheries: commercial
FAO(fisheries: production) | FisheriesWiki | Sea Around Us

More information

Common names
Synonyms
Predators
Reproduction
Maturity
Spawning
Eggs
Egg development
Age/Size
Growth
Length-weight
Length-length
Morphology
Larvae
Abundance

Internet sources

BHL | BOLD Systems | Check for other websites | Check FishWatcher | CISTI | DiscoverLife | FAO(fisheries: ; publication : search) | GenBank (genome, nucleotide) | GOBASE | Google Books | Google Scholar | Google | ispecies | National databases | PubMed | Scirus | Sea Around Us | FishBase | Tree of Life | uBio | uBio RSS | Wikipedia (Go, Search) | Zoological Record

Estimation of some characteristics with mathematical models

Vulnerability (Ref. 71543)
Low vulnerability (16 of 100)
Price category (Ref. 80766)
Low