Madagascar country information

Common names: [No common name]
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Type locality. Known from off the north-west and south-west coasts of Madagascar (Ref. 93929).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/ma.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: de Carvalho, M.R., B. Séret and L.J.V. Compagno, 2002
National Database:

Common names from other countries

Madagaskari akurai, ... more

Classification / Names Populärnamn | synonymer | Catalog of Fishes(Släkte, Arter) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii (hajar och rockor) (sharks and rays) > Torpediniformes (Electric rays) > Narcinidae (Numbfishes)
Etymology: Narcine: Greek, narke = numbness (Ref. 45335); insolita: Name from Latin 'insolitus' meaning unusual or uncommon; referring to the unusual and unique disparate dimensions of the dorsal fins, treated as an adjective (feminine)..

Environment: milieu / climate zone / depth range / distribution range Ekologi

marina bottenlevande; djupintervall 150 - 175 m (Ref. 93929). Tropical; 15°S - 25°S, 42°E - 45°E (Ref. 114953)

Utbredning Länder | FAO områden | Ekosystem | Förekomster | Point map | Utplanteringar | Faunafri

Western Indian Ocean: Madagascar.

Length at first maturity / Size / Vikt / Age

Maturity: L_m ? range ? - 35.6 cm
Max length : 35.6 cm TL (female)

Short description Bestämningsnycklar | Morfologi | Morfometri

Ryggkotor: 119 - 127. This species is distinguished from all its congeners by the following characters: unique presence of a very large and prominent first dorsal fin that is conspicuously taller, larger and with a longer base than the second dorsal fin; large spiracles, conspicuously rounded, not projecting anteriorly lateral to eyes, and with elevated rims all around; interspiracular distance much smaller than interorbital distance; small, broadly rounded lateral cusplets adjacent to principal cusp on teeth of more concealed inner rows; upper and lower tooth bands equal in width and broadly circular in outline; dorsal colouration composed of a yellowish brown background with darker brown to reddish brown irregular blotches on disc margins, posterior disc and anterior margin of snout; darker brown blotches on anterior portion of dorsal and caudal fins, at caudal apex, and laterally on tail at level of dorsal fins; precaudal vertebrae 68-71; total vertebrae 119-127 (Ref. 93929).

Usually found over predominantly muddy substrata (Ref. 93929). Maturity size of males at ca. 27 cm TL; birth size at ca. 14 cm TL (Ref. 114953).

Life cycle and mating behavior Maturities | Reproduktion | Spawnings | Egg(s) | Fecundities | Larver

Main reference Upload your references | referenser | Koordinator : Carvalho, Marcelo | Medarbetare

de Carvalho, M.R., B. Séret and L.J.V. Compagno, 2002. A new species of electric ray of the genus Narcine Henle, 1834 from the South-western Indian Ocean (Chondrichthyes: Torpediniformes: Narcinidae). S. Afr. J. mar. Sci. 24:135-149. (Ref. 93929)

IUCN Red List Status (Ref. 130435)

Data deficient (DD) ; Date assessed: 24 April 2018

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

FAO(Publication : search) | FishSource |

Ytterligare information

Trophic ecology
Födoslag
Diet compositions
Food consumptions
Food rations
Predatorer

Ecology
Ekologi
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Population dynamics
Growths
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversions
Recruitments
Abundances

Life cycle
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Maturities
Fecundities
Spawnings
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Egg(s)
Egg developments
Larver
Larvdynamik

Distribution
Länder
FAO områden
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BRUVS - Videos

Anatomy
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Hjärnstorlek
Otoliths

Physiology
Body compositions
Nutrients
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Swimming type
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Visual pigment(s)
Fiskljud
Diseases / Parasites
Toxicities (LC50s)

Genetics
Genetik
Electrophoreses
Heritabilities

Human related
Aquaculture systems
Vattenbruksprofiler
Avelslinjer
Ciguatera cases
Stamps, coins, misc.

Outreach
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Taxonomy
Populärnamn
synonymer
Morfologi
Morfometri
Bilder

References
referenser

Verktyg

Special reports

Check for Aquarium maintenance | Check for Species Fact Sheets | Check for Aquaculture Fact Sheets

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Summary page | Point data | Populärnamn | Photos

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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.01175 (0.00476 - 0.02897), b=2.88 (2.66 - 3.10), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trofisk nivå (Ref. 69278): 3.1 ±0.3 se; based on size and trophs of closest relatives

Resiliens (Ref. 120179): Låg, lägsta populationsfördubblingstid 4,5-14 år (Assuming fecundity<100).

Fishing Vulnerability (Ref. 59153): Low to moderate vulnerability (26 of 100).

Narcine insolita Carvalho, Séret & Compagno, 2002