Mexico country information

Common names: Gorgona guitarfish, Guitarra de Gorgona
Occurrence: native
Salinity: marine
Abundance: occasional (usually not seen) | Ref: Carrera-Fernández, M., F. Galván-Magaña and O. Escobar-Sánchez, 2012
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: First northernmost record with 2 individuals observed (1 photographed) from Chipehua Bay, Gulf of Tehuantepec. Fishermen in the Gulf group all species of guitarfish common in the area (e.g. Rhinobatos leucorhynchus and R. glaucostigma) which represented 48% of all rays captured (observations obtained from the sampling of sharks and rays between September 2004 and August 2006). Fishermen reported that Gorgona guitarfish is uncommon in the area, so it is possible that the frequency of occurrence of R. prahli may be low, with only occasional captures (Ref. 101827).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/mx.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Carrera-Fernández, M., F. Galván-Magaña and O. Escobar-Sánchez, 2012
National Database:

Common names from other countries

Guitarra de Gorgona, Gorgoongitaarrog, 普氏犁头鳐, ... more

Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii (sharks and rays) > Rhinopristiformes (Shovelnose rays) > Rhinobatidae (Guitarfishes)
Etymology:

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

Marine; demersal; depth range ? - 70 m (Ref. 26282). Tropical; 14°N - 6°S, 92°W - 82°W (Ref. 114953)

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Eastern Pacific: from Mexico and from north-western Costa Rica to northern Peru.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 90.0 cm TL male/unsexed; (Ref. 101827); max. published weight: 1.4 kg (Ref. 37888)

Short description Morphology | Morphometrics

Rostral cartilage distally enlarged; anterior nasal prolongations reaching medial margin of nostrils; posterior margin of spiracle with 2 folds, the medial one rudimentary; a line of about 77 prickles between nuchal region and first dorsal fin; 3 or 4 prickles on shoulders, few tubercles on snout and small prickles on anterior margin of orbits; body covered dorsally with about 80 white dots (3 to 5 mm in diameter) over a brown body; underbody white except snout with a black diamond shape blotch, extending backward laterally (Ref. 13259).

Living individuals reported to be in sandy and rocky environments near coral-reefs at 18-24 m depth of the Colombian coast (Ref. 101827). In contrast the type specimen was taken from a depth of 70 m (Ref. 26282). Ovoviviparous (Ref. 50449). Males mature at ca. 71 cm TL (Ref. 114953).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

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).

Main reference Upload your references | References | Coordinator : McEachran, John | Collaborators

Compagno, L.J.V., 1999. Checklist of living elasmobranchs. p. 471-498. In W.C. Hamlett (ed.) Sharks, skates, and rays: the biology of elasmobranch fishes. Johns Hopkins University Press, Maryland. (Ref. 35766)

IUCN Red List Status (Ref. 130435)

Vulnerable (VU) (A2d); Date assessed: 24 February 2020

CITES (Ref. 128078)

Appendix II: International trade monitored

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

Fisheries: of no interest

FAO(Publication : search) | FishSource |

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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5039 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00275 (0.00162 - 0.00469), b=3.10 (2.95 - 3.25), in cm Total Length, based on LWR estimates for this species & Genus-body shape (Ref. 93245).

Trophic level (Ref. 69278): 3.6 ±0.5 se; based on size and trophs of closest relatives

Resilience (Ref. 120179): Low, minimum population doubling time 4.5 - 14 years (Fec assumed to be <100).

Fishing Vulnerability (Ref. 59153): High vulnerability (56 of 100).

Pseudobatos prahli (Acero, P. & Franke, 1995)