Elasmobranquios (tiburones y rayas) (sharks and rays) >
Carcharhiniformes (Ground sharks) >
Triakidae (Houndsharks) > Triakinae
Etymology: Triakis: tri-, from tres (L.), three; akis (Gr.), point, referring to each tooth consisting of one large central cusp flanked on by both sides by a small cusplet (See ETYFish); semifasciata: semi-, from semis (L.), half; fasciatus (L.), banded, referring to striking black saddle marks that cover only dorsal half of body (See ETYFish).
More on author: Girard.
Environment: milieu / climate zone / depth range / distribution range
Ecología
marino; salobre demersal; rango de profundidad 0 - 156 m (Ref. 96339), usually ? - 6 m (Ref. 55312). Subtropical; 45°N - 19°N, 126°W - 105°W (Ref. 55312)
Eastern Pacific: Oregon, USA to the Gulf of California.
Length at first maturity / Tamaño / Peso / Age
Maturity: Lm 109.8, range 100 - 129 cm
Max length : 198 cm TL macho / no sexado; (Ref. 244); 180.0 cm TL (female); common length : 160 cm TL macho / no sexado; (Ref. ); peso máximo publicado: 18.4 kg (Ref. 40637); edad máxima reportada: 30 años (Ref. 6145)
Found in shallow water from the intertidal to deeper waters, most commonly in enclosed muddy bays; including estuaries and lagoons (S. Wilson, pers. comm.). Prefer sandy areas, mud flats, and bottoms strewn with rocks near rocky reefs and kelp beds. Feed mainly on crabs, shrimps, bony fish, fish eggs, clam necks and innkeeper worms among a large variety of food in its diet. Form mixed schools. Ovoviviparous (aplacental), with 4 to 29 young in a litter. Utilized fresh or frozen for human consumption.
Females produce 6-24 young, which are 20-23 cm long at birth (Ref. 43439). Ovoviviparous, embryos feed solely on yolk (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. 130435: Version 2024-1)
Threat to humans
Harmless
Human uses
Pesquerías: comercial; pesca deportiva: si; Acuario: Comercial
Herramientas
Special reports
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Fuentes de Internet
Estimates based on models
Preferred temperature (Ref.
123201): 12.8 - 24, mean 20.4 °C (based on 131 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5312 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00234 (0.00122 - 0.00451), b=3.12 (2.95 - 3.29), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
Nivel trófico (Ref.
69278): 3.7 ±0.2 se; based on diet studies.
Resiliencia (Ref.
120179): Muy bajo, población duplicada en un tiempo mínimo superior a 14 años (K=0.07-0.09; tm=11-21; tmax=30; Fec=4-12).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (80 of 100).
