Elasmobranquios (tiburones y rayas) (sharks and rays)
(Saw sharks) > Pristiophoridae
Etymology: Pristiophorus: Greek, pristis = saw + Greek, pherein = to carry (Ref. 45335); nancyae: The species name nancyae is in honor of Nancy Packard Burnett for her gracious support of chondrichthyan research at the Pacific Shark Research Center at Moss Landing Marine Laboratories (Ref. 87357)
Environment: milieu / climate zone / depth range / distribution range
; marino; rango de profundidad 286 - 570 m (Ref. 97326), usually - m (Ref. ). Tropical; 0°C -
Western Indian Ocean: central and southern Mozambique (Ref. 87357). Off Kenya and Yemen (Socotra Islands) (Ref. 97326). Records from off Somalia and the Arabian Sea off Pakistan appear to be a different, possibly undescribed, species (Ref. 87357).
Length at first maturity / Tamaño / Peso / Age
Maturity: Lm ?  range ? - 57 cm
Max length : 61.6 cm TL macho / no sexado; (Ref. 97326); 62.1 cm TL (female)
Morfología | Morfometría
Vértebra: 132 - 139. Diagnosis: A small five-gilled sawshark distinguished from its congeners by having the following characteristics: the presence of two rows of enlarged pre-barbel pits on the rostral ventral surface; rostral barbels closer to mouth than snout tip; base of large rostral teeth with ridges; eyes very large, oval-shaped, emerald green in life; first dorsal fin broadly triangular, with rear tip extending behind pelvic fin midbases; lateral trunk denticles imbricated; colouration in life brownish gray laterally, becoming lighter ventrally; fin margins lighter along posterior edges; dorsal rostrum surface with two distinct longitudinal dark stripes; lateral rostral teeth dark-edged (Ref. 87357).
This species is a poorly known inhabitant of the upper continental slope in tropical waters found at depths of 286-500 m (Ref. 87357). Stomach contents include an unidentified organic material, partially digested shrimplike crustaceans, and small decapod shrimps; no fish or cephalopod remains were found (Ref. 87357). Larger individuals had small puncture marks and elongated parallel cuts on their backs and tails suggestive of combat injuries from the rostra of other sawsharks (Ref. 87357). Unknown litter size; it may be caught and discarded as bycatch by offshore shrimp trawlers and other deepwater fisheries operations off Mozambique (Ref. 87357).
Life cycle and mating behavior
Madurez | Reproducción | Puesta | Huevos | Fecundidad | Larva
Ebert, D.A and G.M. Cailliet, 2011. Pristiophorus nancyae, a new species of sawshark (Chondrichthyes: Pristiophoridae) from Southern Africa. Bull. Mar. Sci. 87(3):501-512. (Ref. 87357)
IUCN Red List Status (Ref. 124695)
Threat to humans
ReferenciasAcuiculturaPerfil de acuiculturaRazasGenéticaFrecuencias de alelosheritabilidadEnfermedadesProcesamientoNutrientsMass conversion
ColaboradoresImágenesStamps, Coins Misc.SonidosCiguateraVelocidadTipo de nataciónSuperficie branquialOtolitosCerebrosVisión
Fuentes de Internet
Estimates based on models
Preferred temperature (Ref. 115969
): 9.8 - 12.4, mean 11.4 °C (based on 18 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref. 93245
Nivel trófico (Ref. 69278
): 3.8 ±0.6 se; based on size and trophs of closest relatives
Vulnerability (Ref. 59153
): Low to moderate vulnerability (29 of 100) .