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Rhynchobatus djiddensis (Forsskål, 1775)

Giant guitarfish
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Rhynchobatus djiddensis   AquaMaps   Data sources: GBIF OBIS
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Image of Rhynchobatus djiddensis (Giant guitarfish)
Rhynchobatus djiddensis
Picture by Modder, T.


Palau country information

Common names: [No common name]
Occurrence: misidentification
Salinity: marine
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Outside distributional range (Ref, 114953). Sight record (Ref. 37816).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/ps.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Last, P.R., W.T. White, M.R. de Carvalho, B. Séret, M.F.W. Stehmann and G.J.P. Naylor, 2016
National Database:

Common names from other countries

Classification / Names Populärnamn | synonymer | Catalog of Fishes(Släkte, Arter) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii (hajar och rockor) (sharks and rays) > Rhinopristiformes (Shovelnose rays) > Rhinidae (Wedgefishes)
Etymology: Rhynchobatus: Greek, rhingchos = snout + Greek, batis, -idos = a sting ray (Raja sp.) (Ref. 45335).
  More on author: Forsskål.

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

marina; brackvatten revassocierade; djupintervall 1 - 75 m (Ref. 106604).   Tropical; 35°N - 35°S, 22°E - 83°E

Utbredning Länder | FAO områden | Ekosystem | Förekomster | Point map | Utplanteringar | Faunafri

Western Indian Ocean: restricted to the Red Sea and the tropical western Indian Ocean to South Africa. Also reported from Persian Gulf (Ref. 68964). Apparently misidentified with closely related species in the northern and eastern Indian Ocean and western Pacific (however, Ref. 5978 seems to present a reliable record from western Indonesia).

Length at first maturity / Size / Vikt / Age

Maturity: Lm ?, range 177 - ? cm
Max length : 310 cm TL hane/ej könsbestämd; (Ref. 5578); publicerad maxvikt: 227.0 kg (Ref. 3919)

Short description Bestämningsnycklar | Morfologi | Morfometri

A large guitarfish with large black eyespots on the pectoral bases, a distinctive black cross between the eyes, and rows of small white spots on the upper body; snout pointed and lower caudal lobe short (Ref. 5578). Olive-green above, white below (Ref. 5578). Mouths small and contain flattened, pavement-like teeth.

Biologi     Ordlista (t.ex. epibenthic)

Occurs inshore and in shallow estuaries (Ref. 5578). Feeds on crabs, lobsters, bivalves, small fishes (Ref. 5578) and squids (Ref. 37816). Ovoviviparous (Ref. 50449). Takes crayfish and pilchard bait. Meat and fins sought after in Asian markets (Ref. 30573).

Life cycle and mating behavior Maturities | Reproduktion | Spawnings | Egg(s) | Fecundities | Larver

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). With 4 young, about 43-60 cm in length (Ref. 37816), born in the summer (Ref. 3919).

Main reference Upload your references | referenser | Koordinator | Medarbetare

Compagno, L.J.V., 1986. Rhinobatidae. p. 128-131. In M.M. Smith and P.C. Heemstra (eds.) Smiths' sea fishes. Springer-Verlag, Berlin. (Ref. 3919)

IUCN Red List Status (Ref. 130435)

  Critically Endangered (CR) (A2bd); Date assessed: 03 December 2018

CITES (Ref. 128078)


CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless




Human uses

Fiskeri: kommersiell; sportfisk: ja; Akvarium: Offentliga akvarier
FAO(fiskeri: produktion; publication : search) | FishSource | Sea Around Us

Ytterligare information

Trophic ecology
Födoslag
Diet compositions
Food consumptions
Food rations
Predatorer
Ecology
Ekologi
Home ranges
Population dynamics
Growths
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversions
Recruitments
Abundances
Life cycle
Reproduktion
Maturities
Fecundities
Spawnings
Spawning aggregations
Egg(s)
Egg developments
Larver
Larvdynamik
Distribution
Länder
FAO områden
Ekosystem
Förekomster
Utplanteringar
BRUVS - Videos
Anatomy
Gill areas
Hjärnstorlek
Otoliths
Physiology
Body compositions
Nutrients
Oxygen consumptions
Swimming type
Swimming speeds
Visual pigment(s)
Fiskljud
Diseases / Parasites
Toxicities (LC50s)
Genetics
Genetik
Electrophoreses
Heritabilities
Human related
Aquaculture systems
Vattenbruksprofiler
Avelslinjer
Ciguatera cases
Stamps, coins, misc.
Outreach
Medarbetare
References
referenser

Verktyg

Special reports

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Estimates based on models

Preferred temperature (Ref. 115969): 24.5 - 29.3, mean 27.1 (based on 304 cells).
Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5049   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00372 (0.00166 - 0.00830), b=3.11 (2.91 - 3.31), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trofisk nivå (Ref. 69278):  3.6   ±0.6 se; based on diet studies.
Resiliens (Ref. 120179):  Låg, lägsta populationsfördubblingstid 4,5-14 år (Fec assumed to be <100).
Prior r = 0.28, 95% CL = 0.18 - 0.42, Based on 1 data-limited stock assessment.
Fishing Vulnerability (Ref. 59153):  Very high vulnerability (90 of 100).
Climate Vulnerability (Ref. 125649):  High to very high vulnerability (71 of 100).
Price category (Ref. 80766):   High.