ইলাসমোব্রাঙ্কি (হাঙ্গর এবং রে) (sharks and rays) >
Torpediniformes (Electric rays) >
Narcinidae (Numbfishes)
Etymology: Narcine: Greek, narke = numbness (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
বাস্তুসংস্থান
সামুদ্রিক রীফ সংশ্লিষ্ট; গভীরতার পরিসীমা 1 - 43 m (Ref. 13608). Subtropical; 37°N - 39°S, 98°W - 34°W
Western Atlantic: Espirito Santo, Brazil to northern Argentina (Carvalho, pers. comm.). North Carolina, USA to Florida, northern Gulf of Mexico, central Lesser Antilles and Yucatan (Ref. 26938).
Length at first maturity / আকৃতি / ওজন / Age
Maturity: Lm 28.8 range ? - ? cm
Max length : 54.0 cm WD পুরুষ/ লিঙ্গ অনিধর্ারিত ; (Ref. 26340); common length : 35.0 cm WD পুরুষ/ লিঙ্গ অনিধর্ারিত ; (Ref. 5217); সবের্াচ্চ প্রকাশিত ওজন : 650.00 g (Ref. 6902)
Short description
সনাক্তকারী নির্দেশক | বহিঃ অঙ্গ সংস্থান | মরফোমেট্রিক্স
A pale sand-colored ray, often with ellipses of dark spots on dorsal side of rounded disk (Ref. 26938). Grayish to reddish brown, many rounded blotches outlined with blackish spots. Dark bands across tail up to dorsal fin. Snout darkened (Ref. 7251).
Inhabits coastal waters, on sand or mud bottoms (Ref. 26340). Common along sandy shorelines, sometimes near coral reefs (Ref. 12951). Aggregates in shallow waters ca. 10-20 m deep during summer and autumn months, dispersing to deeper waters during winter (Ref. 114953). Buries itself with only eyes protruding (Ref. 12951). Nocturnal, moves to shallow bays at night to feed; prefers worms, but may take juvenile snake eels, anemones, and, small crustaceans (Ref. 12951). Produces broods of 4 to 15 young (Ref. 26938). Reaches ca. 45 cm TL. Both sexes mature by 27 cm TL; birth size at ca. 11 cm TL (Ref. 114953). Can discharge between 14 and 37 volts. Contact with the skin can produce a severe electric shock. In addition to the main electric organ, this species possesses a bilateral accessory electric organ (Ref. 10011) speculated to have a possible role in social communication (Ref. 10489). Reported to taste good, but not fished commercially. Traded as an aquarium fish at Ceará, Brazil (Ref. 49392).
Life cycle and mating behavior
Maturities | প্রজনন | Spawnings | Egg(s) | Fecundities | শুককীট
Ovoviviparous. Sex ratio of embryos is about one to one, however, small mothers may have predominantly female embryos and that for a given mother, embryos tend to be of one sex (Ref. 46979). Maximum number of embryos per female may reach 15. The young are capable of giving off electric charges even before they are released from the womb (Ref. 46978).
Robins, C.R. and G.C. Ray, 1986. A field guide to Atlantic coast fishes of North America. Houghton Mifflin Company, Boston, U.S.A. 354 p. (Ref. 7251)
IUCN Red List Status (Ref. 130435)
Human uses
মৎস্য: মৎস্যচাষের অস্তিত্ব ; মৎস্যাধার / এ্যাকুয়ারিয়াম : বাণিজ্যিক
হাতিয়ার
Special reports
Download XML
ইন্টারনেট সুত্র
Estimates based on models
Preferred temperature (Ref.
123201): 22.9 - 28, mean 25.6 °C (based on 442 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01122 (0.00605 - 0.02082), b=2.90 (2.73 - 3.07), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
ট্রফিক পর্যায়ে (Ref.
69278): 3.2 ±0.4 se; based on diet studies.
স্থিতিস্থাপক (Ref.
120179): নিম্ন/ , সর্বনিম্ন প্রজন দ্বিগুনের সময় ৪.৪-১৪ বৎসর (Assuming fecundity<100).
Fishing Vulnerability (Ref.
59153): Low to moderate vulnerability (34 of 100).
Nutrients (Ref.
124155): Calcium = 6.47 [0.67, 106.25] mg/100g; Iron = 0.472 [0.039, 5.319] mg/100g; Protein = 16.6 [12.4, 21.0] %; Omega3 = 0.145 [0.049, 0.421] g/100g; Selenium = 14.3 [2.3, 70.5] μg/100g; VitaminA = 22.2 [1.8, 283.1] μg/100g; Zinc = 0.82 [0.06, 9.22] mg/100g (wet weight);
