Raja parva, African brown skate

Raja parva Last & Séret, 2016

African brown skate
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Native range | All suitable habitat | Point map | Year 2050
This map was computer-generated and has not yet been reviewed.
Raja parva   AquaMaps   Data sources: GBIF OBIS
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Image of Raja parva (African brown skate)
No image available for this species;
drawing shows typical species in Rajidae.

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: Raja: Latin, raja, -ae = a sting ray (Raja sp.) (Ref. 45335); parva: Name from Latin word 'parva' meaning small, referring to the small adult size of this skate compared to most of its congeners.

Umwelt: Milieu / Klimazone / Tiefenbereich / Verbreitungsgebiet Ökologie

seewasser benthopelagisch; tiefenbereich ? - 27 m (Ref. 110364). Tropical

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Eastern Central Atlantic: known from Liberia, Senegal (Dakar) and Angola; probably more widspread.

Größe / Gewicht / Alter

Geschlechtsreife: Lm ?  range ? - ? cm
Max length : 37.1 cm TL Männchen/unbestimmt; (Ref. 110364); 41.1 cm TL (female)

Kurzbeschreibung Bestimmungsschlüssel | Morphologie | Morphometrie

This species is distinguished by the following set of characters: subcircular disc, its width 57-60% TL, 1.2 times its length; snout angle 91-96°; short tail, its length 1.2-1.4 times distance from snout tip to rear of cloaca; narrow tail, its width 1.2-1.3 times height at its midlength, 1.1 times at first dorsal-fin origin; pre-upper jaw length 10-13% TL, 1.5-1.8 times internasal width; length of ventral head 24-26% TL; length of snout 3-3.8 times interorbital width; orbit diameter 1.06-0.99 times the interorbital width; height of first dorsal-fin 3.4-3.9 in its base length; procaudal tail long, its length from first dorsal-fin origin to tail tip is 3.8-4.7 times first dorsal-fin base length, 3.4-3.6 times caudal-fin length (base of epichordal lobe of caudal fin very long); relatively short pelvic fins, length of posterior lobe 17-18% TL and of anterior lobe 63-72% of posterior lobe; in adults clasper relatively large, ~24% TL, connected to pelvic-fin inner margin at ~47% of its length from cloaca; anterior margin of head possess denticle bands on both surfaces in adult male; nuchal thorns 2; adult male with well-developed malar thorn patch; thorn rows on tail 3-5; pectoral-fin radials 79-81 in total; trunk centra is usually 27-28; usually 75-86 predorsal centra; total centra ~128-131; 38-46 tooth rows in upper jaw; colour brown dorsally with faint lighter and darker speckling; pectoral ocelli is moderately large, with dark bluish grey spot surrounded by a black and a yellow ring; its ventral surface whitish with reddish yellow snout tip and disc margin (Ref. 110364).
Body shape (shape guide): other (see remarks); Cross section: flattened.

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

Unknown depth range but probably inshore for at least some collected specimens were caught by gill-net (Ref. 110364).

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

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Last, P.R. and B. Séret, 2016. A new Eastern Central Atlantic skate Raja parva sp. nov. (Rajoidei: Rajidae) belonging to the Raja miraletus species complex. Zootaxa 4147(4):477-489. (Ref. 110364)

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

  Gefährdung zunehmend (NT) (A2bd); Date assessed: 04 August 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 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00288 (0.00132 - 0.00632), b=3.25 (3.08 - 3.42), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245).
Trophische Ebene (Ref. 69278):  3.6   ±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 (31 of 100). 🛈