Portugal country information

Common names: Avejão, Breamanta, Uge-manta
Occurrence: native
Salinity: brackish
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments:
National Checklist: Portugal
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/po.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: McEachran, J.D. and C. Capapé, 1984
National Database: Portuguese Freshwater Fishes

Common names from other countries

Raie-papillon épineuse, Raya mariposa, Butterfly ray, ... more

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

Elasmobranchii (sharks and rays) > Myliobatiformes (Stingrays) > Gymnuridae (Butterfly rays)
Etymology: Gymnura: Greek, gymnos = naked + Greek, oura = tail (Ref. 45335).
More on author: Linnaeus.

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

Marine; brackish; demersal; depth range 5 - 100 m (Ref. 6808). Subtropical; 47°N - 39°S, 98°W - 42°E

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

Western Atlantic: southern New England, USA, Brazil (Ref. 7251) to Argentina (Ref. 58839). Eastern Atlantic: Portugal to Ambriz, Angola (including the Mediterranean, Black Sea, and the Madeira and Canary islands).

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 400 cm WD male/unsexed; (Ref. 3709); common length : 200 cm WD male/unsexed; (Ref. 3709); max. published weight: 60.0 kg (Ref. 4699)

Short description Identification keys | Morphology | Morphometrics

Tail short armed with spine. Disk very broad. Very low dorsal and ventral finfolds on tail (Ref. 7251). Disk dark brown to grayish, lower surface of disc and of pelvic fins white, brownish, rosy or rusty cast. Tail white or rosy white below (Ref. 6902).

Maximum length measured is 140 cm (Ref. 5377). Occurs over sand and mud. Feeds on fishes, crustaceans, mollusks and plankton. Ovoviviparous, gestation lasting about 6 months with 4 to 7 embryos produced per female (Ref. 6676).

Life cycle and mating behavior Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | 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). Distinct pairing with embrace (Ref. 205).

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

Bauchot, M.-L., 1987. Raies et autres batoides. p. 845-886. In W. Fischer, M.L. Bauchot and M. Schneider (eds.) Fiches FAO d'identificationpour les besoins de la pêche. (rev. 1). Mèditerranée et mer Noire. Zone de pêche 37. Vol. II. Commission des Communautés Européennes and FAO, Rome. (Ref. 3261)

IUCN Red List Status (Ref. 130435)

Endangered (EN) (A2d); Date assessed: 21 June 2019

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

Fisheries: minor commercial; gamefish: yes

FAO(Fisheries: production; publication : search) | FishSource | Sea Around Us

More information

Trophic ecology
Food items
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Food consumptions
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Predators

Ecology
Ecology
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Population dynamics
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Length-weight rel.
Length-length rel.
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Abundances

Life cycle
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Egg(s)
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Distribution
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BRUVS - Videos

Anatomy
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Otoliths

Physiology
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Nutrients
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Swimming type
Swimming speeds
Visual pigment(s)
Fish sounds
Diseases / Parasites
Toxicities (LC50s)

Genetics
Genetics
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Human related
Aquaculture systems
Aquaculture profiles
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Ciguatera cases
Stamps, coins, misc.

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Taxonomy
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References
References

Tools

Special reports

Check for Aquarium maintenance | Check for Species Fact Sheets | Check for Aquaculture Fact Sheets

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Summary page | Point data | Common names | Photos

Internet sources

Estimates based on models

Preferred temperature (Ref. 115969): 14.9 - 27.8, mean 23.6 (based on 860 cells).

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.01122 (0.00613 - 0.02054), b=3.11 (2.94 - 3.28), in cm Total Length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).

Trophic level (Ref. 69278): 4.5 ±0.1 se; based on diet studies.

Resilience (Ref. 120179): Very Low, minimum population doubling time more than 14 years (Fec 4-7).

Fishing Vulnerability (Ref. 59153): Moderate to high vulnerability (51 of 100).

Climate Vulnerability (Ref. 125649): High vulnerability (60 of 100).

Price category (Ref. 80766): High.

Gymnura altavela (Linnaeus, 1758)