Rioraja agassizii, Rio skate

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Rioraja agassizii (Müller & Henle, 1841)

Rio skate
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Native range | All suitable habitat | Point map | Year 2100
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Rioraja agassizii   AquaMaps   Data sources: GBIF OBIS
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Image of Rioraja agassizii (Rio skate)
Rioraja agassizii
Picture by Bornatowski, H.

Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii (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 Ecology

Marine; demersal; depth range ? - 130 m (Ref. 26375). Subtropical

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Southwest Atlantic: Espírito Santo, Brazil to Argentina.

Length at first maturity / Size / Weight / Age

Maturity: Lm 42.5, range 39 - 45.7 cm
Max length : 33.0 cm WD male/unsexed; (Ref. 26408)

Biology     Glossary (e.g. epibenthic)

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 Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

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

Main reference Upload your references | References | Coordinator : McEachran, John | Collaborators

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. 125652)

  Vulnerable (VU) (A2bd); Date assessed: 01 July 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

FAO - Publication: search | FishSource | Sea Around Us

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Internet sources

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | BOLDSystems | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: genus, species | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GenBank: genome, nucleotide | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | National databases | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | Tree of Life | Wikipedia: Go, Search | World Records Freshwater Fishing | Zoological Record

Estimates based on models

Preferred temperature (Ref. 115969): 10.4 - 22.6, mean 14.8 °C (based on 300 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 1.0000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00501 (0.00316 - 0.00794), b=3.02 (2.88 - 3.16), in cm total length, based on LWR estimates for species & Subfamily-BS (Ref. 93245).
Trophic level (Ref. 69278):  3.6   ±0.0 se; based on diet studies.
Generation time: 5.2 ( na - na) years. Estimated as median ln(3)/K based on 1 growth studies.
Resilience (Ref. 120179):  Low, minimum population doubling time 4.5 - 14 years (Assuming fecundity<100).
Fishing Vulnerability (Ref. 59153):  Moderate to high vulnerability (49 of 100) .
Climate Vulnerability (Ref. 125649):   (0 of 100) .
Nutrients (Ref. 124155):  Calcium = 68.7 [10.9, 238.2] mg/100g ; Iron = 1.15 [0.31, 3.15] mg/100g ; Protein = 16.5 [14.3, 18.9] % ; Omega3 = 0.503 [0.216, 1.431] g/100g ; Selenium = 21 [5, 60] μg/100g ; VitaminA = 16.4 [6.6, 41.2] μg/100g ; Zinc = 0.785 [0.387, 1.768] mg/100g (wet weight);