Aetobatus flagellum, Longheaded eagle ray : fisheries

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Aetobatus flagellum (Bloch & Schneider, 1801)

Longheaded eagle ray
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Aetobatus flagellum
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Classificatie / Names Populaire namen | Synoniemen | Catalog of Fishes(Genus, Soort(en)) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii (haaien en roggen) (sharks and rays) > Myliobatiformes (Stingrays) > Aetobatidae (Pacific eagle rays)
Etymology: Aetobatus: Greek, aetos = eagle + Greek, batis, batidos = a ray (Raja sp.) (Ref. 45335).  More on authors: Bloch & Schneider.

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

; marien; brakwater benthopelagisch; amfidroom (Ref. 51243).   Tropical

Verspreiding Landen | FAO regio's | Ecosystems | Voorkomen | Point map | Introducties | Faunafri

Indo-West: Persian Gulf to Borneo (patchy distribution).

Size / Gewicht / Leeftijd

Maturity: Lm ?  range ? - ? cm
Max length : 72.0 cm WD mannelijk/geslacht niet bekend; (Ref. 4440); Maximaal gepubliceerd gewicht: 13.9 kg (Ref. 40637)

Korte beschrijving Morfologie | Morfometrie

This species is characterized by the following: dorsal without spots or rings; long rostral lobe (longest in adult males) and narrowly pointed; disc very broad and short, its length 55-70% WD; pectoral fins weakly falcate and joining head at eye level, separate from rostral lobe; posterior margins moderately concave, rear tips free and broadly rounded; spiracles large, dorsolateral and visible in dorsal view; mouth ventral, its width narrower than preoral length; nasal curtain large, deeply notched centrally and with a curtain-like fringe; teeth plate-like in a single row, the upper teeth transverse, lower chevron-shaped; disc entirely smooth, no denticles or thorns; tail elongate, whip-like, ca. 1.2-2.8 times WD when undamaged; dorsal-fin small and raked back, apex broadly rounded, free rear tip short with origin behind pelvic-fin insertions; caudal stings 1 or 2, longest greater than preoral length. Colour uniform brownish or greenish brown, mostly white ventrally, pectoral tips and posterior margins of disc mostly pale brownish (Ref. 114953).

Biologie     Verklarende woordenlijst (b.v. epibenthic)

Inhabits inshore waters (Ref. 9862). Often found in brackish waters (Ref. 4832). Ovoviviparous (Ref. 50449). Caught occasionally by bottom trawl and inshore demersal gillnet fisheries off Jakarta. Utilized for its meat, but of limited value due to its rarity and small size (Ref.58048).

Life cycle and mating behavior Geslachtsrijpheid | Voortplanting | Kuitschieten | Eieren | Fecundity | Larven

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).

Voornaamste referentie Upload your references | Referenties | Coördinator | Medewerkers

McEachran, J.D. and B. Séret, 1990. Myliobatididae. p. 67-70. In J.C. Quero, J.C. Hureau, C. Karrer, A. Post and L. Saldanha (eds.) Check-list of the fishes of the eastern tropical Atlantic (CLOFETA). JNICT, Lisbon; SEI, Paris; and UNESCO, Paris. Vol. 1. (Ref. 4440)

Status op de Rode Lijst van het IUCN (Ref. 123251)

  Bedreigd (EN) (A2d+3d+4d); Date assessed: 31 January 2006

CITES (Ref. 123416)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaarlijk voor mensen

  Harmless





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Visserij: van minder commercieel belang
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Estimates based on models

Preferred temperature (Ref. 115969): 24.2 - 29.2, mean 28.2 °C (based on 1688 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.6250   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref. 93245).
Trophic level (Ref. 69278):  3.6   ±0.5 se; based on size and trophs of closest relatives
Weerstandsvermogen (Ref. 120179):  laag, minimale populatieverdubbelingstijd 4,5-14 jaar (Fec assumed to be <100).
Kwetsbaarheid (Ref. 59153):  High to very high vulnerability (71 of 100) .
Prijsklasse (Ref. 80766):   Medium.