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Pseudobatos productus (Ayres, 1854)

Shovelnose guitarfish
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Pseudobatos productus
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Classification / Names Noms communs | Synonymes | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Élasmobranches (requins et raies) (sharks and rays) > Rhinopristiformes (Shovelnose rays) > Rhinobatidae (Guitarfishes)
  More on author: Ayres.

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

; marin; saumâtre démersal; profondeur 1 - 91 m (Ref. 48844), usually 1 - 13 m (Ref. 48844).   Tropical; 38°N - 18°N, 123°W - 106°W (Ref. 114953)

Distribution Pays | Zones FAO | Écosystèmes | Occurrences | Point map | Introductions | 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 / Taille / Poids / Âge

Maturity: Lm ?, range 99 - ? cm
Max length : 119 cm TL mâle / non sexé; (Ref. 48844); 170.0 cm TL (female); poids max. publié: 9.8 kg (Ref. 40637); poids max. publié: 9.8 kg; âge max. reporté: 16 années (Ref. 48844)

Description synthétique Morphologie | Morphométrie

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.

Biologie     Glossaire (ex. 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 Maturité | Reproduction | Frai | Œufs | Fécondité | Larves

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).

Référence principale Upload your references | Références | Coordinateur : McEachran, John | Collaborateurs

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)

Statut dans la liste rouge de l'IUCN (Ref. 120744)

  Quasi-menacé (NT) ; Date assessed: 17 December 2014

CITES (Ref. 115941)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Menace pour l'homme

  Harmless (Ref. 2850)





Utilisations par l'homme

Pêcheries: commercial; pêche sportive: oui
FAO(Publication : search) | FishSource |

Plus d'informations

Noms communs
Synonymes
Métabolisme
Prédateurs
Écotoxicologie
Reproduction
Maturité
Frai
Rassemblement de ponte
Fécondité
Œufs
Développement de l'œuf
Taille/Âge
Croissance
Longueur-poids
Longueur-longueur
Fréquences de longueurs
Morphométrie
Morphologie
Larves
Dynamique des populations larvaires
Recrutement
Abondance
Références
Aquaculture
Profil d'aquaculture
Souches
Génétique
Fréquences alléliques
Héritabilité
Pathologies
Traitement
Mass conversion
Collaborateurs
Images
Stamps, Coins Misc.
Sons
Ciguatera
Vitesse
Type de nage
Surface branchiale
Otolithes
Cerveaux
Vision

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Sources Internet

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).
Niveau trophique (Ref. 69278):  3.6   ±0.3 se; Based on diet studies.
Résilience (Ref. 69278):  Faible, temps minimum de doublement de population : 4,5 à 14 années (tm=7; tmax=11; K=0.1; Fec = 6).
Vulnérabilité (Ref. 59153):  Very high vulnerability (77 of 100) .
Catégorie de prix (Ref. 80766):   Low.