Rhizoprionodon acutus, Milk shark : fisheries, gamefish

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Espécie relacionadas
- Espécies em
  Rhizoprionodon
- Espécies em
  Carcharhinidae
- - Classificação -
- Carcharhinidae
- Carcharhiniformes
- Elasmobranchii
- Chordata
- Animalia

Rhizoprionodon acutus (Rüppell, 1837)

Milk shark

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Native range | All suitable habitat | Point map | Year 2050

This map was computer-generated and has not yet been reviewed.

Rhizoprionodon acutus AquaMaps Data sources: GBIF OBIS

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Image of Rhizoprionodon acutus (Milk shark)

Classificação / Names Nomes comuns | Sinónimos | Catalog of Fishes(Género, Espécies) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii (tubarões e raias) (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); acutus: Latin for sharp or pointed, probably referring to narrow, pointed snout (See ETYFish).
More on author: Rüppell.

Environment: milieu / climate zone / depth range / distribution range Ecologia

marinhas; Água doce; estuarina bentopelágico; anfídromo (Ref. 51243); intervalo de profundidade 1 - 200 m (Ref. 244). Tropical; 41°N - 30°S, 27°W - 156°E

Distribuição Países | Áreas FAO | Ecossistemas | Ocorrências | Point map | Introduções | Faunafri

Eastern Atlantic: Madeira and Mauritania to Angola (Ref. 244). Indo-West Pacific: Persian Gulf (Ref. 68964), Red Sea and East Africa to Indonesia, north to Japan, south to Australia. Also reported from Gulf of Taranto in Mediterranean Sea (Ref. 231).

Length at first maturity / Tamanho / Peso / Idade

Maturity: L_m 75.0, range 70 - 80 cm
Max length : 175 cm TL macho/indeterminado; (Ref. 12693); 80.8 cm TL (female); common length : 110 cm TL macho/indeterminado; (Ref. 47737); peso máx. Publicado: 5.0 kg (Ref. 40637); Idade máx. registada: 8 anos (Ref. 244)

Descrição breve Chaves de identificação | Morfologia | Morfometria

Espinhos dorsais (total) : 0; Espinhos anais: 0. A small shark with a long, narrow, snout, big eyes without notches, long labial furrows, and oblique-cusped teeth which may be smooth-edged or weakly serrated; 2nd dorsal fin small, low and behind larger anal fin; no interdorsal ridge (Ref. 5578). Grey or grey-brown above, white below (Ref. 5578). Dorsal and anal fins with dusky or blackish edges, fins slightly darker than back (Ref. 9997).

Found on continental shelves, often on sandy beaches and rarely in estuaries (Ref. 244). Reported to enter freshwater and recorded several times from Cambodia as far upstream as the Great Lake (Ref. 12693). Occurs near the surface in shallow waters (Ref. 12693). Feeds mainly on small pelagic and benthic bony fishes, also cephalopods and other invertebrates (Ref. 244). Viviparous (Ref. 50449). Utilized fresh and possibly dried salted for human consumption and for fishmeal (Ref. 9997). The 178 cm specimen recorded off Africa is possibly based on some other species (Ref. 9997).

Life cycle and mating behavior Maturidade | Reprodução | Desova | Ovos | Fecundidade | Larvas

Distinct pairing with embrace (Ref. 205). Viviparous, with a yolk-sac placenta; 2 to 8 in a litter (Ref. 9997), usually 2 to 5 after a gestation period of ~ 12 months; no seasonality in the reproductive cycle (Ref.58048). Size at birth between 25 and 39 cm.

Referência principal Upload your references | Referências | Coordenador : Compagno, Leonard J.V. | Colaboradores

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)

Categoria na Lista Vermelha da IUCN (Ref. 130435: Version 2024-2)

Vulnerável, ver o Livro Vermelho da IUCN (VU) (A2bd); Date assessed: 04 February 2020

CITES

Appendix II: International trade monitored

CMS (Ref. 116361)

Not Evaluated

Ameaça para o homem

Harmless (Ref. 244)

Utilização humana

Pescarias: espécies comerciais; peixe desportivo: sim

FAO - Publication: search | FishSource | Sea Around Us

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Trophic ecology
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Estimates based on models

Preferred temperature (Ref. 123201): 19.6 - 28.5, mean 26.9 °C (based on 1463 cells).

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5078 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00347 (0.00280 - 0.00429), b=3.07 (3.03 - 3.11), in cm total length, based on LWR estimates for this species (Ref. 93245).

Nível Trófico (Ref. 69278): 4.3 ±0.4 se; based on diet studies.

Generation time: 5.5 ( na - na) years. Estimated as median ln(3)/K based on 1 growth studies.

Resiliência (Ref. 120179): Muito baixo, tempo mínimo de duplicação da população maior que 14 anos (K=0.2-0.6; Fec=1).

Fishing Vulnerability (Ref. 59153): High vulnerability (61 of 100).

Categoria de preço (Ref. 80766): Medium.

Nutrients (Ref. 124155): Calcium = 16.4 [2.3, 90.2] mg/100g; Iron = 0.575 [0.146, 1.652] mg/100g; Protein = 21.2 [18.2, 23.5] %; Omega3 = 0.198 [0.082, 0.472] g/100g; Selenium = 58 [16, 171] μg/100g; VitaminA = 20.7 [7.9, 53.8] μg/100g; Zinc = 0.698 [0.324, 1.318] mg/100g (wet weight);

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