Elasmobranchii (hajar och rockor) (sharks and rays) >
Carcharhiniformes (Ground sharks) >
Carcharhinidae (Requiem sharks)
Etymology: Rhizoprionodon: rhiza (Gr.), root; prion (Gr.) saw; odon (Gr.), tooth, referring to teeth with serrated (saw-like) bases, or roots [replacement name for Rhizoprion Ogilby 1915, preoccupied by Rhizoprion Jourdan 1861 in mammals] (See ETYFish); terraenovae: terra (L.), earth or land; novus (L.), new, i.e., Newfoundland, Canada, where Richardson erroneously thought it occurred (See ETYFish).
More on author: Richardson.
Miljö: miljö / Klimatzon / djupintervall / distributionsområde
Ekologi
marina; brackvatten bottenlevande; djupintervall 0 - 280 m (Ref. 26938), usually 0 - 10 m (Ref. 55195). Subtropical; 43°N - 25°S, 100°W - 32°W (Ref. 55195)
Western Atlantic: New Brunswick, Canada to the Gulf of Mexico. Southwest Atlantic: coasts of Brazil.
Längd vid första mognad / Storlek / Vikt / Ålder
Könsmognad: Lm 87.5, range 85 - 90 cm
Max length : 110 cm TL hane/ej könsbestämd; (Ref. 37512); 110.0 cm TL (female); common length : 70.0 cm TL hane/ej könsbestämd; (Ref. 37512); publicerad maxvikt: 7.3 kg (Ref. 40637); rapporterad maxålder: 10 år (Ref. 6140)
Small, generally gray, streamlined shark, with long pointed snout. Posterior margin of anal fin straight or slightly concave. Second dorsal fin origin well behind anal fin origin (Ref. 26938).
Body shape (shape guide): fusiform / normal.
Reaches at least 103 cm TL (Ref. 244). Abundant in the continental shelves, from the intertidal to deeper waters. Often occurs close to the surf zone off sandy beaches, and also enclosed bays, sounds, and harbors, in estuaries and river mouths. Feeds on small bony fishes, shrimps, crabs, segmented worms and mollusks (gastropod feet). Viviparous, with 1 to 7 young in a litter (Ref. 27549). Size at birth about 29 to 37 cm. Utilized for human consumption. Minimum depth from Ref. 055195.
Distinct pairing with embrace (Ref. 205). Viviparous, placental (Ref. 50449). 1 to 7 young per litter. Larger females carry more young. Size at birth 29-37 cm. Gestation period is 10 to 11 months in the northern Gulf of Mexico. Sex ratio of near term fetuses is 1:1 (Ref. 244).
Compagno, L.J.V., 1984. FAO Species Catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 2 - Carcharhiniformes. FAO Fish. Synop. 125(4/2):251-655. Rome: FAO. (Ref. 244)
Status på IUCN:s rödlista (Ref. 130435: Version 2025-2 (Global))
Hot mot människor
Harmless
Mänskliga användningsområden
Fiskeri: husbehovsfiske; sportfisk: ja
Verktyg
Särskilda rapporter
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Internet-källor
Uppskattningar baserade på modeller
Index för fylogenetisk mångfald (Ref. 82804) |
PD50 = 0.5078 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00417 (0.00268 - 0.00648), b=3.00 (2.87 - 3.13), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref. 93245). |
Trofisk nivå (Ref. 69278) |
4.4 ±0.5 se; based on diet studies. |
Resiliens (Ref. 120179) |
Mycket låg, lägsta populationsfördubblingstid mer än 14 år (K=0.19-0.45(?); tmax=10; tm=4; Fec 1-7). |
Sårbarhet i fisket (Ref. 59153) |
Moderate to high vulnerability (50 of 100). 🛈 |
Sårbarhet för klimatet (Ref. 125649) |
Very high vulnerability (85 of 100). 🛈 |
Priskategori (Ref. 80766) |
Medium.
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Näringsämnen (Ref. 124155) |
Calcium = 23.3 [2.5, 120.6] mg/100g; Iron = 0.89 [0.24, 2.75] mg/100g; Protein = 22.6 [19.7, 24.8] %; Omega3 = 0.372 [0.150, 0.861] g/100g; Selenium = 25.1 [6.4, 70.6] μg/100g; VitaminA = 8.35 [2.78, 24.50] μg/100g; Zinc = 0.452 [0.218, 0.855] mg/100g (wet weight); based on nutrient studies. |