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Pseudobatos productus (Ayres, 1854)

Shovelnose guitarfish
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Pseudobatos productus
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Classification / Names Nomi Comuni | Sinonimi | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchi (squali e razze) (sharks and rays) > Rhinopristiformes (Shovelnose rays) > Rhinobatidae (Guitarfishes)
  More on author: Ayres.

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

; marino; salmastro demersale; distribuzione batimetrica 1 - 91 m (Ref. 48844), usually 1 - 13 m (Ref. 48844).   Tropical; 38°N - 18°N, 123°W - 106°W (Ref. 114953)

Distribuzione Stati | Aree FAO | Ecosystems | Presenze | Point map | Introduzioni | Faunafri

Eastern Pacific: endemic to the eastern Pacific from San Francisco, USA to the Gulf of California, and possibly to Mazatlan, Mexico (Ref. 48844).

Length at first maturity / Size / Peso / Age

Maturity: Lm ?, range 99 - ? cm
Max length : 119 cm TL maschio/sesso non determinato; (Ref. 48844); 170.0 cm TL (female); peso massimo pubblicato: 9.8 kg (Ref. 40637); peso massimo pubblicato: 9.8 kg; Età massima riportata: 16 anni (Ref. 48844)

Short description Morfologia | Morfometria

Broad disc is greater in length than width; a relatively smooth dorsal surface except for a single row of thorns around the eyes and extending along the back and tail; a long, pointed snout with a rounded tip; small, rounded, pebble-like teeth; a first dorsal fin that originates closer to the pelvic fin base than to the caudal fin origin; a thick tail and a moderately large caudal fin without a distinct lower lobe. Tooth count: 102-112/98-117. Spiral valve count: 8-10.

Biologia     Glossario (es. epibenthic)

Found on sand or mud bottoms of bays, seagrass beds, estuaries, and near rocky reefs. Nomadic and gregarious. Found singly or in aggregations (Ref. 12951). Burrows in sand during the day, feeds on crabs, worms, clams and small fishes at night (Ref. 12951). Ovoviviparous, with 6 to 28 pups in a litter (Ref. 48844). Females mature by 7 years at 87-99 cm TL; males reaches 91-110 cm TL; birth size at 20-24 cm TL (Ref. 114953). Etymology: The genus comes from the Greek word rhine, meaning shark, and the Latin word batis, meaning ray, in reference to its body form being intermediate between that of a shark and a ray. The species name comes Latin, meaning produced, in reference to its pointed snout (Ref. 48844).

Life cycle and mating behavior Maturità | Riproduzione | Deposizione | Uova | Fecundity | Larve

Exhibit ovoviparity (aplacental viviparity), with embryos feeding initially on yolk, then receiving additional nourishment from the mother by indirect absorption of uterine fluid enriched with mucus, fat or protein through specialised structures (Ref. 50449). Adults of both sexes congregate during the breeding season in shallow bays and estuaries and likewise leave when the pupping season is over after mating (Ref. 48844). Gestation lasts for about 12 months (Ref. 48844).

Main reference Upload your references | Bibliografia | Coordinatore : McEachran, John | Collaboratori

Eschmeyer, W.N., E.S. Herald and H. Hammann, 1983. A field guide to Pacific coast fishes of North America. Boston (MA, USA): Houghton Mifflin Company. xii+336 p. (Ref. 2850)

IUCN Red List Status (Ref. 120744)

  Near Threatened (NT) ; Date assessed: 17 December 2014

CITES (Ref. 115941)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless (Ref. 2850)





Human uses

Pesca: commerciale; Pesce da pesca sportiva: si
FAO(Publication : search) | FishSource |

Informazioni ulteriori

Stati
Aree FAO
Ecosystems
Presenze
Introduzioni
Stocks
Ecologia
Dieta
Prede
Consumo di cibo
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Nomi Comuni
Sinonimi
Metabolismo
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Fecundity
Uova
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Age/Size
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Length-weight
Length-length
Length-frequencies
Morfometria
Morfologia
Larve
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Estimates of some properties based on models

Preferred temperature (Ref. 115969): 15.3 - 25.9, mean 22.4 (based on 149 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5039   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00295 (0.00163 - 0.00533), b=3.05 (2.89 - 3.21), in cm Total Length, based on LWR estimates for this species & Genus-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  3.6   ±0.3 se; Based on diet studies.
Resilienza (Ref. 69278):  Basso, tempo minimo di raddoppiamento della popolazione 4.5 - 14 anni (tm=7; tmax=11; K=0.1; Fec = 6).
Vulnerability (Ref. 59153):  Very high vulnerability (77 of 100) .
Price category (Ref. 80766):   Low.