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Elasmobranchii (haaien en roggen) (sharks and rays) > Rajiformes (Skates and rays) > Arhynchobatidae (Softnose skates)
Etymology: Rioraja: Latin, rivus = river (in Greek, rheo) + Latin, raja, -ae = ray, fish.
More on authors: Müller & Henle.

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

marien demersaal; diepte ? - 130 m (Ref. 26375). Subtropical

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Southwest Atlantic: Espírito Santo, Brazil to Argentina.

Lengte bij maturiteit / Grootte / Gewicht / Leeftijd

Maturity: L_m 42.5, range 39 - 45.7 cm
Max length : 33.0 cm WD mannelijk / geslacht onbekend; (Ref. 26408)

A coastal species found on sand, mud or gravel bottoms (Ref. 26375). Feeds on crustaceans, mollusks and fishes (Ref. 26375). Oviparous (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205).

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Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref. 50449).

Hoofdreferentie Upload your references | Referenties | Coördinator : McEachran, John | Medewerkers

McEachran, J.D. and K.A. Dunn, 1998. Phylogenetic analysis of skates, a morphologically conservative clade of elasmobranchs (Chondrichthyes: Rajidae). Copeia 1998(2):271-290. (Ref. 27314)

Status op de Rode Lijst van het IUCN (Ref. 130435)

Kwetsbaar, zie IUCN Rode Lijst (VU) (A2bd); Date assessed: 01 July 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaar voor de mens

Harmless

Gebruik door de mens

Visserij: commercieel

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Estimates based on models

Preferred temperature (Ref. 123201): 10.4 - 22.6, mean 14.8 °C (based on 300 cells).

Fylogenetische diversiteitsindex (Ref. 82804): PD₅₀ = 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00490 (0.00309 - 0.00776), b=3.02 (2.89 - 3.15), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).

Trofisch niveau (Ref. 69278): 3.6 ±0.0 se; based on diet studies.

Weerstandsvermogen (Ref. 120179): laag, minimale populatieverdubbelingstijd 4,5-14 jaar (Assuming fecundity<100).

Fishing Vulnerability (Ref. 59153): Moderate to high vulnerability (54 of 100).

Prijsklasse (Ref. 80766): Medium.

Nutrients (Ref. 124155): Calcium = 43 [7, 197] mg/100g; Iron = 0.911 [0.243, 2.649] mg/100g; Protein = 17.3 [14.6, 19.8] %; Omega3 = 0.522 [0.178, 1.883] g/100g; Selenium = 16.5 [4.9, 49.3] μg/100g; VitaminA = 16.8 [6.1, 46.1] μg/100g; Zinc = 0.769 [0.367, 1.401] mg/100g (wet weight);

Rioraja agassizii (Müller & Henle, 1841)