Elasmobranchii (hajar och rockor) (sharks and rays)
(Ground sharks) > Carcharhinidae
Etymology: Rhizoprionodon: Greek, rhiza = root + Greek, prion = saw + Greek, odous = teeth (Ref. 45335). More on author: Poey.
Environment: milieu / climate zone / depth range / distribution range
; marina; sötvatten; brackvatten revassocierade; djupintervall ? - 500 m (Ref. 244), usually ? - 100 m (Ref. 244). Tropical; 28°N - 40°S, 88°W - 32°W (Ref. 55194)
Western Atlantic: Caribbean, including the Bahamas, south to Uruguay. The separation of this species from Rhizoprionodon terraenovae whether as a distinct species or a representative of a southern subspecies is still uncertain and pending until detailed studies are commenced.
Length at first maturity / Size / Vikt / Age
Maturity: Lm 65.0, range 80 - ? cm
Max length : 113 cm TL hane/ej könsbestämd; (Ref. 111958); common length : 75.0 cm TL hane/ej könsbestämd; (Ref. 5217); publicerad maxvikt: 7.5 kg (Ref. 111958)
Common in bays and estuaries often entering rivers. Also found in offshore waters at depths of about 500 m, generally less than 100 m. Feeds mainly on small bony fishes, including wrasses, but also marine snails, squid and shrimp. Viviparous, with 2 to 6 young in a litter. Size at birth about 31 to 39 cm. Utilized salted or frozen for human consumption and processed into fish meal. Not dangerous (Ref. 9710).
Distinct pairing with embrace (Ref. 205). Viviparous, placental (Ref. 50449).
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)
IUCN Red List Status (Ref. 120744)
CITES (Ref. 118484)
Threat to humans
Estimates based on models
Preferred temperature (Ref. 115969
): 17.5 - 27.1, mean 24.2 (based on 80 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5078 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00214 (0.00140 - 0.00327), b=3.10 (2.97 - 3.23), in cm Total Length, based on LWR estimates for this species & Genus-body shape (Ref. 93245
Trofisk nivå (Ref. 69278
): 4.0 ±0.2 se; Based on diet studies.
Generation time: 3.7 ( na - na) years. Estimated as median LN(3)/K based on 2 growth studies.
Resiliens (Ref. 120179
): Mycket låg, lägsta populationsfördubblingstid mer än 14 år (Fec=2; K=0.3-0.42).
Vulnerability (Ref. 59153
): Moderate to high vulnerability (51 of 100) .