Range: Southern Mexico and the Gulf of California to San Francisco. The ray can live up to 11 years, and full-grown sizes are around 120 cm for males, and females reach 137 cm. However, in Mexican waters the thornback guitarfish population is small and fragmented, and the degree to which it is affected by fishing is uncertain. Ranges from Northern California to the Gulf of California [11] Life history. Enter a search request and press enter. 1997. The thornback guitarfish (Platyrhinoidis triseriata) is a species of ray in the family Platyrhinidae, and the only member of its genus.Despite its name and appearance, it is more closely related to electric rays than to true guitarfishes of the family Rhinobatidae. The thornback guitarfish (Platyrhinoidis triseriata) is a species of ray in the family Platyrhinidae, and the only member of its genus. Accessed: 29 May 2017. [11], Once a trash fish discarded by fishermen, there is now demand for these fish. Shovelnose guitarfish. The Giant shovelnose ray is probably the most commercially-fished guitarfish in the Western Pacific. It becomes mature at an estimated seven to eight years old. Cabrillo Marine Aquarium, San Pedro, Los Angeles County, CA. If you continue using our website, we'll assume that you are happy to receive all cookies on this website and you agree to our Privacy Policy. Shovelnose guitarfish are found along the Southwestern coast of North America, ranging from San Francisco to Guerrero, Mexico as well as within the Gulf of California and along the coast of Baja California. Nutritional info for shovelnose guitarfish could not be found; shown is 100g of raw skate wing. The lower lip is inscribed by a deep furrow that wraps around the mouth corners. Froese, Rainer and Pauly, Daniel, eds. [5] NOAA Fisheries, West Coast Region: About Groundfish Fisheries. As most of its range lies within US waters, the species has been assessed as Least Concern overall by the International Union for Conservation of Nature (IUCN). [3] Other common names for this species include banjo shark (not to be confused with the Australian banjo sharks, Trygonorrhina), California thornback, guitarfish, round skate, shovelnose, thornback, and thornback ray. (858) 534-4440 Learn more. Females give birth in shallow waters from June to October. It inhabits coastal habitats with muddy or sandy bottoms, including bays, sloughs, beaches, and lagoons, and can also be found in kelp beds and adjacent areas. Almost the entire dorsal and ventral hypothalamus is connected to the visual system, but still maintains a similar lack of differentiation as with sharks. The skin is entirely covered by tiny dermal denticles; additionally there are large recurved thorns in two or three rows along the leading margin of the disc, in small groups on the snout tip, around the eyes, and on the "shoulders", and most distinctively in three rows running from the middle of the back to the second dorsal fin. https://spo.nmfs.noaa.gov/content/age-growth-and-sexual-maturity-shovelnose-guitarfish-rhinobatos-productus-ayres. University of California, San Diego It is aplacental viviparous, with developing embryos sustained until birth by yolk. Stay up to date with the latest developments. [3][4] One year later in the same journal, Samuel Garman placed this species in a newly created genus, Platyrhinoidis. They can live exclusively in freshwater, but it does not happen very often. California Sea Grant [1] Farrugia, T.J., Márquez-Farías, F., Freedman, R.M., Lowe, C.G, Smith, W.D. Age, growth, and sexual maturity of shovelnose guitarfish, Rhinobatos productus. In some areas (particularly in northern Mexico), their numbers have been depleted significantly, and scientists now believe that the species is near threatened with extinction. Males mature at 8 years old and females mature at 7 years old. Contacts, A sit and wait predator during the day, the guitarfish hunts by staying hidden in the sand until it sees prey [11]. The Giant shovelnose ray is probably the most commercially-fished guitarfish in the Western Pacific. The first dorsal fin lies closer to the caudal fin than the pelvic fins. [3] The ray can live up to 11 years, and full-grown sizes are around 120 cm for males, and females reach 137 cm. Final California Commercial Landings. At the same time, it has a flattened build giving it ray-like features. They are also accidentally captured in net fisheries targeting other species. Environment: milieu / climate zone / depth range / distribution range Ecology. Though once considered rare north of Monterey Bay, quite a few have been reported from San Francisco Bay piers since 2007. Shovelnose Guitarfish Rhinobatos productus . (Farrugia, et al., 2011) Biogeographic Regions; nearctic. DompfaDan (Dan Acker) and a guitarfish from the Goleta Pier .