Narke dipterygia (Bloch & Schneider, 1801)
Numbray
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Narke dipterygia
Picture by Devarapalli, P.
Pictures | Google image
Picture by Devarapalli, P.
Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Elasmobranchii (sharks and rays) > Torpediniformes (Electric rays) > Narkidae (Sleeper rays)
Etymology: Narke: Greek, narke = numbness (Ref. 45335).
Etymology: Narke: Greek, narke = numbness (Ref. 45335).
Environment / Climate / Range Ecology
Marine; demersal. Tropical
Size / Weight / Age
Distribution Countries | FAO areas | Ecosystems | Occurrences | Introductions | Faunafri
Indo-West Pacific: Oman and the Arabian Sea eastward to Japan and south to Singapore and Indonesia.
Found in continental waters, both inshore and offshore (Ref. 9913). Biology little known (Ref. 9913). The electric organs present on disc are used to stun the prey.
Main reference
Upload your references | References | Coordinator : Carvalho, Marcelo | Collaborators
Compagno, L.J.V. and P.R. Last, 1999. Narkidae. Sleeper rays. p. 1443-1446. In K.E. Carpenter and V.H. Niem (eds.) FAO identification guide for fishery purposes. The living marine resources of the Western Central Pacific. FAO, Rome.
IUCN Red List Status (Ref. 90363)
Threat to humans
Other (Ref. 10011)
Human uses
Fisheries: minor commercial
FAO(Publication : search) | FisheriesWiki | Sea Around Us
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Ecosystems
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Common names
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Eggs
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Synonyms
Metabolism
Predators
Ecotoxicology
Reproduction
Maturity
Spawning
Fecundity
Eggs
Egg development
Age/Size
Growth
Length-weight
Length-length
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References
Aquaculture
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Aquaculture
Aquaculture profile
Strains
Genetics
Allele frequencies
Heritability
Diseases
Processing
Mass conversion
Tools
E-book | Field guide | Length-frequency wizard | Life-history tool | Point map | Classification Tree
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Special reports
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Internet sources
BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | Faunafri | Fishtrace | GenBank(genome, nucleotide) | GOBASE | Google Books | Google Scholar | Google | IGFA World Record | iSpecies | National databases | PubMed | Scirus | SeaLifeBase | Tree of Life | uBio | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoological Record
Estimates of some properties based on empirical models
Phylogenetic diversity index (Ref. 82805): PD50 = 0.6252 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (-0.30300 - 0.32300), b=3.04 (2.92 - 3.16), based on all LWR estimates for this BS (Ref. 93245).
Trophic Level (Ref. 69278): 3.2 ±0.3 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278): Low, minimum population doubling time 4.5 - 14 years (Assuming fecundity<100).
Vulnerability (Ref. 59153): Low vulnerability (10 of 100) .