Elasmobranquios (tiburones y rayas) (sharks and rays) >
Carcharhiniformes (Ground sharks) >
Carcharhinidae (Requiem sharks)
Etymology: Scoliodon: scolio-, from skolios (Gr.), oblique; odon (Gr.), tooth, referring to oblique teeth pointing towards sides of mouth (See ETYFish); macrorhynchos: macro-, from makros (Gr.), long; rhynchos (Gr.), snout, referring to its long (and extremely flattened) snout (See ETYFish).
Entorno: milieu / zona climática / rango de profundidad / gama de distribución
Ecología
marino demersal. Tropical
Western Central Pacific: W Indonesia, Malaysia, Gulf of Thailand, Singapore, Borneo, Philippines, China, Hong Kong, Taiwan and Japan; exceptions, E Indonesia, New Guinea, northern Australia, and remainder of the Oceania region.
Longitud en la primera madurez / Tamaño / Peso / Edad
Madurez: Lm 42.9, range 38 - 39.7 cm
Max length : 71.5 cm TL macho / no sexado; (Ref. 126960); 80.0 cm TL (female); peso máximo publicado: 220.88 g (Ref. 124713)
Descripción breve
Claves de identificación | Morfología | Morfometría
Vértebra: 149 - 171. This small carcharhinid species is distinguished by the following set of characters: snout long and extremely flattened; slender body and tail; smooth-edged teeth with slender, strongly oblique, blade-like cusps and no cusplets; anterior teeth strongly sexually dimorphic, for adult males greatly elongate and flexuous; total tooth row counts 25-28/23-28 rows or 48-56 total rows; second dorsal-fin origin well posterior of anal-fin origin, about opposite posterior third of anal-fin base; second dorsal-fin origin to anal fin origin 6.0-9.1% TL, 1.3-2.5 times second dorsal-fin base; interdorsal space 17.9-22.2% TL; small pelvic fins, anterior margins 41-56% of pectoral anterior margin; first dorsal fin small, broadly triangular, origin behind pectoral fin free rear tips, free rear tip over posterior half of pelvic fin bases, length 12.9-15.5% TL, inner margin 2.1-3.0 in base; second dorsal fin very small, base 2.0-3.5 times height; height 18-27% of first dorsal-fin height; anal fin large, length 11.1-14.1% TL, height 1.7-2.5 times second dorsal-fin height, base 1.9-3.1 times second dorsal-fin base; total vertebral count 149-171, monospondylous precaudal count 44-50, diplospondylous precaudal count 53-64, diplospondylous caudal count 49-59, precaudal count 98-114; colour greenish-bronze dorsally, off white ventrally when fresh; preserved specimens are slate-grey dorsally whitish ventrally with waterline clearly demarcated along head, more diffuse along body, no distinct black spots on fins (Ref. 84283).
Adults are found in shallow, inshore waters, most abundant near large freshwater outflows, e.g. Pearl River estuary (Hong Kong) and the large Borneo drainage systems (Ref. 84283).
White, W.T., P.R. Last and G.J.P. Naylor, 2010. Scoliodon macrorhynchos (Bleeker, 1852), a second species of spadenose shark from the Western Pacific (Carcharhiniformes: Carcharhinidae). pp. 61-76. In P.R. Last, W.T. White, and J.J. Pogonoski (eds). Descriptions of new sharks and rays from Borneo. CSIRO Marine and Atmospheric Research Paper no. 32. (Ref. 84283)
Situación en la Lista Roja de la UICN (Ref. 130435: Version 2025-2 (Global))
Amenaza para el ser humano
Harmless
Usos humanos
Herramientas
Informes especiales
Descargar XML
Fuentes de Internet
Estimaciones basadas en modelos
Índice de diversidad filogenética (Referencia 82804) |
PD50 = 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high]. |
|
Bayesian length-weight
|
a=0.00309 (0.00197 - 0.00484), b=3.03 (2.90 - 3.16), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245). |
Nivel trófico (Referencia 69278) |
4.0 ±0.6 se; based on size and trophs of closest relatives |
|
Generation time |
4.6 ( na - na) years. Estimated as median ln(3)/K based on 2 growth studies. |
Resiliencia (Referencia 120179) |
Muy bajo, población duplicada en un tiempo mínimo superior a 14 años (Fec = 1; K=0.2;). |
Vulnerabilidad pesquera (Ref. 59153) |
Moderate vulnerability (41 of 100). 🛈 |