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Elasmobranchii (sharks and rays) > Rhinopristiformes (Shovelnose rays) > Glaucostegidae (Giant guitarfishes)
More on author: Cuvier.

Issue
IN genus Rhinobatos in Eschmeyer (CofF ver. November 2013: Ref. 94485).

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

Marine; demersal; depth range 0 - 119 m (Ref. 9909). Subtropical; 29°N - 18°S, 49°E - 156°E

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

Northern Indian Ocean; Persian Gulf to Myanmar.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 280 cm SL male/unsexed; (Ref. 30573)

Ranges from the intertidal to offshore continental shelves down to 119 m (Ref. 9909). A carnivorous fish that feeds on large shellfishes (Ref. 58784). Ovoviviparous (Ref. 50449). Produces 6-10 pups a litter (Ref.114953). Biology little known (Ref. 9909). Utilized where it occurs but details lacking (Ref. 9909).

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 | Collaborators

Ebert, D.A., S. Fowler and M. Dando, 2021. Sharks of the World: A complete guide. Princeton University Press, 607p. (Ref. 125614)

IUCN Red List Status (Ref. 130435: Version 2024-1)

Critically Endangered (CR) (A2bd); Date assessed: 04 April 2022

CITES

Appendix II: International trade monitored

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

Fisheries: commercial

FAO - Publication: search | FishSource |

More information

Trophic ecology
Food items
Diet composition
Food consumption
Food rations
Predators

Ecology
Ecology

Population dynamics
Growth parameters
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversion
Recruitment
Abundance

Life cycle
Reproduction
Maturity
Maturity/Gills rel.
Fecundity
Spawning
Spawning aggregations
Eggs
Egg development
Larvae
Larval dynamics

Distribution
Countries
FAO areas
Ecosystems
Occurrences
Introductions
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Anatomy
Gill area
Brain
Otolith

Physiology
Body composition
Nutrients
Oxygen consumption
Swimming type
Swimming speed
Visual pigments
Fish sound
Diseases & Parasites
Toxicity (LC50s)

Genetics
Genetics
Heterozygosity
Heritability

Human related
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Aquaculture profiles
Strains
Ciguatera cases
Stamps, coins, misc.

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Taxonomy
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References
References

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Summary page | Point data | Common names | Photos

Internet sources

Estimates based on models

Preferred temperature (Ref. 123201): 25.2 - 29.1, mean 28.1 °C (based on 1678 cells).

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00234 (0.00159 - 0.00347), b=3.02 (2.91 - 3.13), in cm total length, based on LWR estimates for this species (Ref. 93245).

Trophic level (Ref. 69278): 3.5 ±0.37 se; based on food items.

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

Fishing Vulnerability (Ref. 59153): Very high vulnerability (90 of 100).

Price category (Ref. 80766): Low.

Glaucostegus granulatus (Cuvier, 1829)