Classification / Names Populärnamn | synonymer | Catalog of Fishes(Släkte, Arter) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii (hajar och rockor) (sharks and rays) > Rajiformes (Skates and rays) > Arhynchobatidae (Softnose skates)
Etymology: Rioraja: Latin, rivus = river (in Greek, rheo) + Latin, raja, -ae = ray, fish.
Eponymy: Jean Louis Rudolphe Agassiz (1807–1873) was a Swiss-American geologist, glaciologist and zoologist whose speciality was ichthyology. [...] (Ref. 128868), visit book page.
More on authors: Müller & Henle.

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

marina bottenlevande; djupintervall ? - 130 m (Ref. 26375). Subtropical

Utbredning Länder | FAO områden | Ekosystem | Förekomster | Point map | Utplanteringar | Faunafri

Southwest Atlantic: Espírito Santo, Brazil to Argentina.

Length at first maturity / Size / Vikt / Age

Maturity: L_m 42.5, range 39 - 45.7 cm
Max length : 33.0 cm WD hane/ej könsbestämd; (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).

Life cycle and mating behavior Könsmognad | Reproduktion | Lek | Ägg | Fecundity | Larver

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

Main reference Upload your references | referenser | Koordinator : McEachran, John | Medarbetare

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)

IUCN Red List Status (Ref. 130435: Version 2024-1)

Sårbar, se IUCNs rödlista (VU) (A2bd); Date assessed: 01 July 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

Fiskeri: kommersiell

FAO - Publication: search | FishSource | Sea Around Us

Ytterligare information

Trophic ecology
Födoslag
Födosammansättning
Födointag
Food rations
Predatorer

Ecology
Ekologi

Population dynamics
Tillväxtparametrar
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversion
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Life cycle
Reproduktion
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Maturity/Gills rel.
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Lek
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Ägg
Egg development
Larver
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Distribution
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Summary page | Point data | Populärnamn | Photos

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Estimates based on models

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

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00490 (0.00312 - 0.00769), b=3.02 (2.89 - 3.15), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).

Trofisk nivå (Ref. 69278): 3.6 ±0.0 se; based on diet studies.

Resiliens (Ref. 120179): Låg, lägsta populationsfördubblingstid 4,5-14 år (Assuming fecundity<100).

Fishing Vulnerability (Ref. 59153): Moderate to high vulnerability (52 of 100).

Price category (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)