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Narcine brasiliensis (Olfers, 1831)

Brazilian electric ray
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Narcine brasiliensis   AquaMaps   Data sources: GBIF OBIS
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Narcine brasiliensis
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Guyana country information

Common names: Electric ray, Spotted torpedo ray
Occurrence: questionable
Salinity: marine
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Also Ref. 5217. Outside distributional range, identification of species needed (within the range for N. brancrofti).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/gy.html
National Fisheries Authority: http://www.sdnp.org.gy/minagri/mofc&l/Fisheries/fisheries_department.htm
Occurrences: Occurrences Point map
Main Ref: Lowe-McConnell, R.H., 1962
National Database:

Common names from other countries

Raie électrique brésilienne, Lesser electric ray, Bvrazilian electric ray, ... more

分類 / Names 共通名の | 類義語 | Catalog of Fishes(部類, 種) | ITIS | CoL | WoRMS | Cloffa

板鰓亜鋼(サメとエイ類) (sharks and rays) > Torpediniformes (Electric rays) > Narcinidae (Numbfishes)
Etymology: Narcine: Greek, narke = numbness (Ref. 45335).

Environment: milieu / climate zone / depth range / distribution range 生態学

海 関連する礁; 深さの範囲 1 - 43 m (Ref. 13608).   Subtropical; 37°N - 39°S, 98°W - 34°W

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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 / サイズ / 重さ / 年齢

Maturity: Lm 28.8  range ? - ? cm
Max length : 54.0 cm WD オス/雌雄の選別がない; (Ref. 26340); common length : 35.0 cm WD オス/雌雄の選別がない; (Ref. 5217); 最大公表体重: 650.00 g (Ref. 6902)

簡単な記述 検索表 | 形態学 | 形態計測学

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).

生物学     用語集 (例 epibenthic)

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 | 繁殖 | Spawnings | Egg(s) | Fecundities | 幼生

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).

主な参考文献 Upload your references | 参考文献 | コーディネーター : Carvalho, Marcelo | 協力者

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のレッドリストの状況は (Ref. 130435)

  絶滅危惧に近い (NT) (A2d); Date assessed: 01 July 2019

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

人間に対する脅威

Other (Ref. 10011)




Human uses

水産業: 食糧水産; 水族館・水槽: 商業
FAO(Publication : search) | FishSource |

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Estimates based on models

Preferred temperature (Ref. 115969): 22.9 - 28, mean 25.6 (based on 442 cells).
Phylogenetic diversity index (Ref. 82804):  PD50 = 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).
栄養段階 (Ref. 69278):  3.2   ±0.4 se; based on diet studies.
回復力 (Ref. 120179):  低い, ４．５年～１４年の倍増期間の最小個体群 (Assuming fecundity<100).
Fishing Vulnerability (Ref. 59153):  Low to moderate vulnerability (34 of 100).
価格帯 (Ref. 80766):   Unknown.