Okamejei cairae, Borneo sand Skate

Okamejei cairae Last, Fahmi & Ishihara, 2010

Borneo sand Skate
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Image of Okamejei cairae (Borneo sand Skate)
Okamejei cairae
Photo von Vidthayanon, C.

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

Elasmobranchii (Haie und Rochen) (sharks and rays) > Rajiformes (Skates and rays) > Rajidae (Skates)
Etymology: cairae: Named for the Connecticut-based parasitologist, Dr Janine Caira.
Eponymy: Dr Janine N Caira (d: 1957) is a Canadian parasitologist who is Professor of Ecology and Evolutionary Biology at the University of Connectictut. [...] (Ref. 128868), visit book page.
More on authors: Last, Fahmi & Ishihara.

Umwelt: Milieu / Klimazone / Tiefenbereich / Verbreitungsgebiet Ökologie

seewasser benthopelagisch; tiefenbereich 65 - 150 m (Ref. 106604). Tropical

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Western Pacific: off western Borneo, South China Sea.

Länge bei der ersten Reifung / Größe / Gewicht / Alter

Geschlechtsreife: Lm 34.8, range 34 - 35.5 cm
Max length : 36.0 cm TL Männchen/unbestimmt; (Ref. 84285); 39.0 cm TL (female)

Kurzbeschreibung Bestimmungsschlüssel | Morphologie | Morphometrie

This species is distinguished by the following set of characters: disc with narrowly rounded apices, not broad, width 61-70% TL, 1.2-1.3 times its length; snout angle 84-106°; moderately long tail, length 0.9-1.1 in distance from snout tip to rear of cloaca; slender tail, width 1.2-1.7 times height at its midlength, 1.1-1.7 times at first dorsal-fin origin; pre-upper jaw length 14-16% TL, 1.8-2.1 times internasal width; ventral length 27-30% TL; snout length 2.8-3.6 times interorbital width; orbit diameter 93-103% interorbital width in large males, 69-89% in females; first dorsal-fin height 2.3-3.0 its base length; distance from first dorsal-fin origin to tail tip 4.1-5.4 times first dorsal-fin base length, 2.9-3.2 times caudal-fin length; medium sized pelvic fins, length of posterior lobe 15-17% TL, length of anterior lobe 78-92% of posterior lobe; adult clasper about 22% TL, connected to pelvic-fin inner margin at about 40% of its length from cloaca in adult male; clasper glans expanded slightly, soft, claw-like funnel; anterior margins of both surfaces of disc of males with denticle bands, no dorsal bands in females and juveniles; 1-3 nuchal thorns present; malar thorn patch elongate and posteriorly positioned; tail thorns very small (rudimentary and possibly deciduous in mature males), in 5 irregular rows in both sexes and juveniles; total pectoral radials 78-84; centra: trunk 24-31, predorsal 68-75, total 123-141; 40-51 tooth rows in upper jaw; mainly yellowish to brownish with variable size clusters of fine brownish spots (sometimes faint) over most of dorsal disc; rostral cartilage not strongly demarcated from rest of snout; prominent, dark brown ocellate markings near rear tip, and often near center of each pectoral fin; ventral surface usually pale to medium greyish brown over head and abdomen, distinctly darker than paler area around margin of disc; ventral sensory pores large, silvery white with dark margins when fresh, uniformly black in preservative, not surrounded by greyish blotches, none on abdomen and pelvic girdle; each dorsal fin with a dark anterior saddle, caudal fin with 2 dark bars (Ref. 84285).
Body shape (shape guide): other.

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

Lebenszyklus und Paarungsverhalten Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fruchtbarkeit | Larven

Hauptreferenz Laden Sie Ihre Referenzen hoch | Referenzen | Koordinator : McEachran, John | Partner

Last, P.R., Fahmi and H. Ishihara, 2010. Okamejei cairae sp. nov. (Rajoidei: Rajidae), a new skate from the South China Sea. pp. 89-100. In Last, P.R., White, W.T. & Pogonoski, J.J. (eds.): Descriptions of new sharks and rays from Borneo. CSIRO Marine and Atmospheric Research Paper no. 32. (Ref. 84285)

IUCN Rote Liste Status (Ref. 130435: Version 2025-2 (Global))

  Verwundbar (VU) (A2d); Date assessed: 06 May 2020

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Bedrohung für Menschen

  Harmless





Nutzung durch Menschen

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Schätzungen auf der Grundlage von Modellen

Phylogenetischer Diversitätsindex
(Ref. 82804) 		PD50 = 0.5001 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight a=0.00309 (0.00144 - 0.00663), b=3.24 (3.07 - 3.41), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophische Ebene
(Ref. 69278) 		4.0   ±0.6 se; based on size and trophs of closest relatives
Widerstandsfähigkeit
(Ref. 120179) 		niedrig, Verdopplung der Population dauert 4,5 - 14 Jahre. (Preliminary low fecundity).
Anfälligkeit der Fischerei
(Ref. 59153) 		Low to moderate vulnerability (33 of 100). 🛈