http://www.fishbase.org/Summary/speciesSummary.php?genusname=Narcine&speciesname=insolita ---> http://192.134.151.83/Summary/speciesSummary.php?genusname=Narcine&speciesname=insolita http://192.134.151.83/Summary/speciesSummary.php?genusname=Narcine&speciesname=insolita ---> https://fishbase.mnhn.fr/Summary/speciesSummary.php?genusname=Narcine&speciesname=insolita https://fishbase.mnhn.fr/Summary/speciesSummary.php?genusname=Narcine&speciesname=insolita ---> https://fishbase.mnhn.fr/summary/Narcine-insolita.html
Narcine insolita, Madagascar numbfish
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drawing shows typical species in Narcinidae.
Elasmobranchii (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
Ecology
Marine; demersal; depth range 150 - 175 m (Ref.
93929
). Tropical; 15°S - 25°S, 42°E - 45°E (Ref.
114953
)
Western Indian Ocean: Madagascar.
Length at first maturity / Size / Weight / Age
Maturity: L
m
 
?
  range ? - 35.6 cm
Max length : 35.6 cm TL (female)
Short description
Morphology
|
Morphometrics
Vertebrae
: 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
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
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
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
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Estimates based on models
Phylogenetic diversity index (Ref.
82804
): PD
50
= 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
).
Trophic level (Ref.
69278
): 3.1 ±0.3 se; based on size and trophs of closest relatives
Resilience (Ref.
120179
): Low, minimum population doubling time 4.5 - 14 years (Assuming fecundity<100).
Fishing Vulnerability (Ref.
59153
): Low to moderate vulnerability (26 of 100).
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Page last modified by :
mrius-barile
- 20 July 2016
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