Cephaloscyllium silasi, Indian swellshark

Cephaloscyllium silasi (Talwar, 1974)

Indian swellshark
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Cephaloscyllium silasi   AquaMaps   Data sources: GBIF OBIS
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Image of Cephaloscyllium silasi (Indian swellshark)
Cephaloscyllium silasi
Picture by Siripittrakul, B. & T. Krajangdara

Classification / Names Nombres comunes | Sinónimos | Catalog of Fishes(Género, Especie) | ITIS | CoL | WoRMS | Cloffa

Elasmobranquios (tiburones y rayas) (sharks and rays) > Carcharhiniformes (Ground sharks) > Scyliorhinidae (Cat sharks) > Scyliorhininae
Etymology: Cephaloscyllium: cephalus, from kephale (Gr.), head, referring to its very broad and depressed head; skylion, Greek for dogfish or small shark. (See ETYFish);  silasi: In honor of Eric Godwin Silas (1928-2018), Sri Lankan-born Indian ichthyologist and fisheries scientist, Director, Central Marine Fisheries Institute (India), “whose excellent publications on the ichthyofauna of the continental shelf of the south-west coast of India have added much to our knowledge of the fauna of this region”. (See ETYFish).

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

marino batidemersal; rango de profundidad 250 - 500 m (Ref. 95495). Deep-water; 16°N - 9°N

Distribución Países | Áreas FAO | Ecosistemas | Ocurrencias, apariciones | Point map | Introducciones | Faunafri

Western Indian Ocean: vicinity of Quilon, India (Ref. 244) and Sauqira Bay, Oman (Ref. 10914).

Tamaño / Peso / Age

Maturity: Lm ?  range ? - 36.7 cm
Max length : 36.0 cm TL macho / no sexado; (Ref. 95495); 45.0 cm TL (female)

Short description Morfología | Morfometría

This is a small shark with the following characters: stout body with expanded belly; labial furrows absent but a vestigial lower labial furrow may be present; anterior nasal flaps are broadly triangular; head depressed, flattened and broad, rounded in dorsal and ventrally; mouth large and arched; 5 gill slits, dorsolaterally placed and last two gill slits over pectorals, the 1-3 gill slits are subequal in length, 5th smallest; eyes dorsolateral and slit like; large mouth, arched or crescentic; mouth width 0.6 times HL; first dorsal origin slightly in front of pelvic insertion and placed above pelvics (Ref. 95495).

Biología     Glosario (por ej. epibenthic)

Found on the uppermost continental slope. Probably a dwarf species. Oviparous (Ref. 50499). This species could possibly attains a maximum size of 50.0 cm TL, with males reported (Ref. 26842) to reach length at maturity at 36.7 cm TL. A 45.0 cm female was found gravid and have two egg cases, one in each uterus, containing visible embryos (85.1-86.2 mm) with attached yolk sac. Stomach examined contains crustaceans and cephalopods (Ref. 95495).

Life cycle and mating behavior Madurez | Reproducción | Puesta | Huevos | Fecundidad | Larva

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

Main reference Upload your references | Referencias | Coordinador : Compagno, Leonard J.V. | Colaboradores

Compagno, L.J.V., 1984. FAO Species Catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 2 - Carcharhiniformes. FAO Fish. Synop. 125(4/2):251-655. Rome: FAO. (Ref. 244)

IUCN Red List Status (Ref. 125652)

  Critically Endangered (CR) (A2d); Date assessed: 19 November 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

Pesquerías: sin interés
FAO - Publication: search | FishSource |

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componentes alimenticios
consumo de alimento
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Fuentes de Internet

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | BOLDSystems | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: Género, Especie | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GenBank: genome, nucleotide | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | Árbol de la vida | Wikipedia: Go, búsqueda | World Records Freshwater Fishing | Expediente Zoológico

Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00275 (0.00140 - 0.00542), b=3.20 (3.02 - 3.38), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Nivel trófico (Ref. 69278):  4.0   ±0.5 se; based on size and trophs of closest relatives
Resiliencia (Ref. 120179):  Bajo, población duplicada en un tiempo mínimo de 4.5-14 años (Fec assumed to be <100).
Fishing Vulnerability (Ref. 59153):  Low to moderate vulnerability (35 of 100).