Élasmobranches (requins et raies) (sharks and rays) >
Rhinopristiformes (Shovelnose rays) >
Pristidae (Sawfishes)
Etymology: Anoxypristis: Greek, ana = up + Greek, oxy = sharp, pointed + Greek, pristis = saw (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
Écologie
marin; eau douce; saumâtre benthopélagique; amphidrome (Ref. 51243); profondeur 0 - 40 m (Ref. 9859), usually ? - 40 m (Ref. 55270). Tropical; 43°N - 20°S, 30°E - 160°E (Ref. 114953)
Indo-West Pacific: widespread, Red Sea to eastern Australia, north to Japan.
Length at first maturity / Taille / Poids / Âge
Maturity: Lm 264.0, range 246 - 282 cm
Max length : 470 cm TL mâle / non sexé; (Ref. 9859)
Greyish above, pale below; fins usually pale. Body shark-like, pectoral fins distinct; head flattened, with a blade-like snout bearing 18-22 pairs of lateral teeth; blade slender, not tapering distally. Nostrils very narrow with small nasal flaps. Rostral teeth short, flattened, broadly triangular, lacking a groove along posterior margins; no teeth on basal quarter of blade. Adults with widely spaced denticles, young with naked skin.
Found inshore, often in river deltas and estuaries; penetration well up rivers needs confirmation (Ref. 9859). Common in sheltered bays with sandy bottoms. More active swimmer than other sawfishes (Ref. 114953). Feeds on small fish, cuttlefish (Ref. 9859) and small benthic invertebrates such as prawns (Ref. 114953). Ovoviviparous (Ref. 50449). Most fecund sawfish, reported to reach sexual maturity at 2-3 years (Ref. 114953). Females have litters of approximately 12 pups (Ref. 114953). Generally harmless but its saw-like snout may cause serious injury when caught: it is known thrash violently and vigorously (Ref. 9859). Caught for its flesh and liver (which is rich in oil) in some parts of Asia (Ref. 6871). Maximum lengths of up to 610 cm TL are based on unconfirmed reports (Ref. 9859).
Life cycle and mating behavior
Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | Larves
Ovoviviparous. Litter size from 6 to 23, young born in the spring (Ref. 9859).
Mould, B., 1994. A world list of rays. The scientific nomenclature and distribution of the recent Batoidea (Batoidea, Elasmobranchii, Chondrichthyes). University of Nottingham, [UK]. 82 p. (Ref. 8630)
Statut dans la liste rouge de l'IUCN (Ref. 130435)
Utilisations par l'homme
Pêcheries: commercial; pêche sportive: oui
Outils
Articles particuliers
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Sources Internet
Estimates based on models
Preferred temperature (Ref.
123201): 24.6 - 29.1, mean 28.2 °C (based on 1982 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 1.0078 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00501 (0.00198 - 0.01270), b=3.05 (2.83 - 3.27), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Niveau trophique (Ref.
69278): 4.5 ±0.62 se; based on food items.
Résilience (Ref.
120179): Faible, temps minimum de doublement de population : 4,5 à 14 années (Fec assumed to be <100).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (90 of 100).
