Common names from other countries
Elasmobranchii (tubarões e raias) (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
Ecologia
marinhas demersal; intervalo de profundidade ? - 130 m (Ref. 26375). Subtropical
Southwest Atlantic: Espírito Santo, Brazil to Argentina.
Length at first maturity / Tamanho / Peso / Idade
Maturity: Lm 42.5, range 39 - 45.7 cm
Max length : 33.0 cm WD macho/indeterminado; (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).
Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref. 50449).
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)
Categoria na Lista Vermelha da IUCN (Ref. 130435)
CITES (Ref. 128078)
Not Evaluated
Ameaça para o homem
Harmless
Utilização humana
Pescarias: espécies comerciais
Ferramentas
Relatórios especiais
Descarregue XML
Fontes da internet
Estimates based on models
Preferred temperature (Ref.
115969): 10.4 - 22.6, mean 14.8 (based on 300 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 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).
Nível Trófico (Ref.
69278): 3.6 ±0.0 se; based on diet studies.
Resiliência (Ref.
120179): Baixo, tempo mínimo de duplicação da população 4,5 - 14 anos (Assuming fecundity<100).
Fishing Vulnerability (Ref.
59153): Moderate to high vulnerability (54 of 100).