Rhinobatos jimbaranensis, Jimbaran shovelnose ray

Rhinobatos jimbaranensis Last, White & Fahmi, 2006

Jimbaran shovelnose ray
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Image of Rhinobatos jimbaranensis (Jimbaran shovelnose ray)
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drawing shows typical species in Rhinobatidae.

Klassifizierung / Names Namen | Synonyme | Catalog of Fishes(Gattung, Arten) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii (Haie und Rochen) (sharks and rays) > Rhinopristiformes (Shovelnose rays) > Rhinobatidae (Guitarfishes)
Etymology: Rhinobatos: Greek, rhinos = nose + Greek, batis, -idos = a ray (Raja sp.) (Ref. 45335);  jimbaranensis: Named for its type locality, the Jimbaran Bay.  More on authors: Last, White & Fahmi.

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

; seewasser benthopelagisch.   Tropical

Verbreitung Länder | FAO Gebiete | Ecosystems | Vorkommen | Point map | Einführungen | Faunafri

Eastern Indian Ocean: endemic to central Indonesia (Ref. 114953).

Length at first maturity / Size / Gewicht / Alter

Maturity: Lm 76.5  range ? - ? cm
Max length : 89.2 cm TL Männchen/unbestimmt; (Ref. 74367); 99.4 cm TL (female)

Kurzbeschreibung Morphologie | Morphometrie

This species is defined by the following set of adult characters: disc wedge-shaped, width 32-33% TL, length more than 1.3 (1.35-1.39) times width; snout moderately elongate, length 3.4-3.6 times interspiracular distance, 5-5.5 times interorbital width; orbit medium-sized, 1.5-1.6 times spiracle length; nostrils weakly oblique, length 1.3-1.4 times internarial distance; preoral length 7.7-8.1 times internarial distance; anterior nasal flaps penetrating slightly into internarial space, however, well separated at their insertion; posterior nasal flaps broad; spiracular folds 2, outermost fold only slightly taller than inner fold; ridges of rostral cartilage almost parallel, converging slightly anteriorly but not constricted medially; anterior cartilage sickle shaped, pointed posteriorly; distance between fifth gill slits 3.1-3.4 times in ventral head length; prebranchial sensory pore patch obvious, extending to first gill slit; postscapular sensory canal obscure, without exposed lateral pores, not grooved; thorn patches on supraorbit, scapular region, and dorsal midline rudimentary, inconspicuous; inner margin of pelvic-fin slightly shorter than its base; interdorsal distance more than 2.5 (2.8-3.1) times first dorsal-fin base; dorsal caudal margin about 2.1 times preventral margin; upper jaw with 62-77 tooth rows; post-synarcual centra 176-180; nasal lamellae more than 50 (51-55); dorsal fin not distinctly bicolored; white spots absent on dorsal disc (Ref. 72461).

Biologie     Fachlexikon (Englisch) (z.B. epibenthic)

Demersal inshore on inner insular shelf. Mainly feeds on small crustaceans (Ref. 114953). The smallest pregnant female observed from this species was 74.7 cm TL; with pregnant females having 6-11 embryos, birth size unknown, but embryos well developed at 13 cm TL (Ref. 72461). Males mature at 77-80 cm TL. Females produces litters of 6-11 pups (Ref. 114953).

Life cycle and mating behavior Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fecundity | Larven

Hauptreferenz Upload your references | Referenzen | Koordinator : McEachran, John | Partner

Last, P.R., W.T. White and Fahmi, 2006. Rhinobatos jimbaranensis and R. penggali, two new shovelnose rays (Batoidea: Rhinobatidae) from eastern Indonesia. Cybium 30(3):261-271. (Ref. 72461)

IUCN Rote Liste Status (Ref. 123251)

  gefährdet, siehe IUCN Red List (VU) (A2cd+3cd+4cd; B1ab(iii,v)); Date assessed: 31 January 2006

CITES (Ref. 123416)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Bedrohung für Menschen

  Harmless





Nutzung durch Menschen

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Estimates based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00302 (0.00153 - 0.00594), b=3.13 (2.96 - 3.30), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic level (Ref. 69278):  3.8   ±0.4 se; based on size and trophs of closest relatives
Widerstandsfähigkeit (Ref. 120179):  mittel, Verdopplung der Population dauert 1,4 - 4,4 Jahre. (Preliminary K or Fecundity.).
Verwundbarkeit (Ref. 59153):  Moderate to high vulnerability (50 of 100) .