Canary Islands country information

Common names: [No common name]
Occurrence: native
Salinity: marine
Abundance: fairly common (chances are about 50%) | Ref: Brito, A., 1991
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Reported from 5-100 m depth. It has a specialized diet in the Canary Islands, both in size and species. The main prey item are teleosts and secondary cephalopods. The opportunistic character of this predator is reflected by the diversity of preys (Ref. 107710). It is the most frequent observed elasmobranch species by recreational divers and shows a strong seasonal pattern in sighting probability with a low when seawater temperatures reaches its maximum (above 22˚C) (Ref. 107711). This species produces 13.0 ± 1.9 pups/litter, with ±6 months gestation period, and size at birth 24-26 cm TL (Ref. 107713). A triannual reproductive cycle is observed in the islands (Ref. 107713). Also Ref. 247.
National Checklist:
Country Information:
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Brito, A., 1991
National Database: PescaBase

Common names from other countries

Ange de mer commun, Angelote, Скватина европейская (=морской ангел), ... more

Classification / Names Κοινά ονόματα | Συνώνυμα | Catalog of Fishes(Γένος, Είδη) | ITIS | CoL | WoRMS | Cloffa

Ελασμοβράγχιοι (καρχαρίες και σαλάχια) (sharks and rays) > Squatiniformes (Angel sharks) > Squatinidae (Angel sharks)
Etymology: Squatina: Latin for skate, which angel sharks superficially resemble, presumably tautonymous with Squalus squatina Linnaeus 1758 (no species mentioned). (See ETYFish); squatina: Latin for skate, which angel sharks superficially resemble. (See ETYFish).
More on author: Linnaeus.

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

Θαλασσινό(ά); Υφάλμυρο βενθικό(ς); ωκεανόδρομο(ς) (Ref. 51243); εύρος βάθους 5 - 150 m (Ref. 247). Temperate; 63°N - 21°N, 19°W - 42°E

Κατανομή Χώρες | Περιοχές FAO | Οικοσυστήματα | Παρουσίες | Point map | Εισαγωγές | Faunafri

Northeast Atlantic: southern Norway, Sweden and Shetland Islands to Morocco and West Sahara, including the Canary Islands, the Mediterranean and the Black Sea (Ref. 247). Range and abundance declining 1severely throughout its range; proposed legal protection in Britain (Ref.58085). The European Council Regulations 43/2009, 23/2010, 57/2011, 44/2012, 40/2013, 43/2014, 2015/104 and 2016/72 prohibit to fish for, to retain on board, to tranship and to land the S. squatina in all waters from the European Community (F. Osaer, pers.comm. 04/2016).

Length at first maturity / Μέγεθος / Βάρος / Age

Maturity: L_m 147.5, range 102 - 169 cm
Max length : 183 cm TL αρσενικό/απροσδιόριστο; (Ref. 247); 244.0 cm TL (female); common length : 150 cm TL αρσενικό/απροσδιόριστο; (Ref. ); μεγ. δημοσιευμένο βάρος: 80.0 kg (Ref. 35388)

Short description Μορφολογία | Μορφομετρία

Ραχιαίες άκανθες (συνολικά): 0; Μαλακές ραχιαίες ακτίνες (συνολικά): 0. Broad flattened body, with enlarged pectoral and pelvic fins, no anal fin. Eyes and large spiracles dorsally. Gill openings at the sides of the head. The mouth is terminal. Coloration variable, from grey to reddish or greenish-brown with scattered small white spots and blackish dots dorsally (Ref. 78469). No ocelli on body (Ref. 247).

A benthic species that occurs inshore, on coasts and along the continental shelf; may enter estuaries (Ref. 247, 58085). Found mainly on sand or mud bottoms; sluggish by day, lying buried with eyes protruding. Also utilizes areas with macroalgae, kelp or rocks (Ref. 88920). Nocturnal species, swims off bottom at night. Feeds mainly on flatfishes and other benthic fishes, but also on skates, crustaceans and molluscs, with one record of swallowed cormorant (Ref. 247, 28070). Moves to deeper waters during winter, returning to the shallower depths in the spring (Ref. 88187), moving northwards in summer. Ovoviviparous (Ref. 50449, 107715). Females generally grow larger than males (Ref. 58137, 107710, 107713, 107715). Detects weak electric fields generated by other organisms (e.g. potential prey) (Ref. 10311). The marine leech Stibarobdella macrothela is a common parasite (Ref. 107712) and the isopod Aegapheles deshaysiana a common micropredator (Ref. 107714) for this shark species in the Canary Islands. Utilized fresh and dried salted for human consumption, and possibly for oil and fishmeal (Ref. 247). Reaches 250 cm (Ref. 35388).

Life cycle and mating behavior Γεννητική Ωρίμανση | Αναπαραγωγή | Γεννοβολία | Αβγά | Γονιμότητα | Προνύμφες

Ovoviviparous, produce 7-25 pups/litter (Ref. 58085), 13.0 +/- 1.9 pups in the Canary Is (Ref. 107713) with litter number increasing with female size. Gestation period lasts for 8-10 months (born Dec-Feb in Mediterranean, July in England) (Ref. 58085), and +/- 6 months in the Canary Is (Ref. 107713). Size at birth ranges from 24-30 cm TL (Ref. 58085). Embryos feed solely on yolk (Ref. 50449). Full term embryos weighed 189-200 g; no egg capsules found around ova or embryos (Ref. 107715). A biannual reproductive cycle is likely the case for this species (Ref. 32746), triannual cycle in the Canary Is (Ref. 107713).

Main reference Upload your references | Αναφορές | Συντονιστής : Compagno, Leonard J.V. | Συνεργάτες

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 1 - Hexanchiformes to Lamniformes. FAO Fish. Synop. 125(4/1):1-249. Rome, FAO. (Ref. 247)

IUCN Red List Status (Ref. 130435)

Critically Endangered (CR) (A2bcd); Date assessed: 12 July 2017

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Appendix I & II: Endangered migratory species conserved through agreements

Threat to humans

Traumatogenic

Human uses

αλιεία: περιορισμένης εμπορικότητας; αλιεία αναψυχής: ναί

FAO(αλιεία: Παραγωγή, species profile; publication : search) | FishSource | Η θάλασσα γύρω μας

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Διαδικτυακές πηγές

Estimates based on models

Preferred temperature (Ref. 115969): 7.7 - 19.4, mean 11.4 (based on 854 cells).

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00832 (0.00428 - 0.01615), b=3.05 (2.88 - 3.22), in cm Total Length, based on LWR estimates for this species & Genus-body shape (Ref. 93245).

Τροφικό Επίπεδο (Ref. 69278): 4.1 ±0.5 se; based on diet studies.

Ελαστικότητα (Ref. 120179): Χαμηλό, ελάχιστος χρόνος για διπλασιασμό πληθυσμού 4,5 - 14 έτη (Fec=9-20).

Prior r = 0.27, 95% CL = 0.16 - 0.47, Based on 1 stock assessment.

Fishing Vulnerability (Ref. 59153): Very high vulnerability (90 of 100).

Climate Vulnerability (Ref. 125649): Moderate vulnerability (40 of 100).

Price category (Ref. 80766): Medium.

Squatina squatina (Linnaeus, 1758)