Longfin gurnard

Longfin gurnard
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Scorpaeniformes
Family: Triglidae
Genus: Chelidonichthys
Subgenus: Aspitrigla
Species:
C. obscurus
Binomial name
Chelidonichthys obscurus
(Walbaum, 1792)
Synonyms[2]
  • Trigla obscura Walbaum, 1792
  • Aspitrigla obscura (Walbaum, 1792)
  • Trigla obscura Bloch & Schneider, 1801
  • Aspitrigla obscura (Bloch & Schneider, 1801)

The longfin gurnard (Chelidonichthys obscurus), the long-finned gurnard or shining gurnard, is a species of ray-finned fish belonging to the family Triglidae, the gurnards and sea robins. This fish is found in the eastern Atlantic Ocean, including the Mediterranean Sea and the Black Sea. This species is of commercial importance as a food fish.

Taxonomy

The longfin gurnard was first formally described in 1798 as Trigla obscura by the German physician, naturalist and taxonomist Johann Julius Walbaum with the type locality given as the Mediterranean Sea.[3] Within the genus Chelidonichthys the longfin gurnard is classified within the subgenus Aspitrigla. The specific name obscura means "dark", "dim" or "indistinct", Walbaum did not explain this but it may refer to this species plain colour pattern in comparison to the streaked gurnard (C. lastoviza).[4]

Description

The longfin gurnard has a large head which is armoured by large bony plates characterised by many ridges and spines,[5] with no occipital groove. There are two separate dorsal fins, the first contains 10 or 11 spines while the second has between 17 and 19 soft rays and the anal fin has 17 or 18 soft rays.[6] The first dorsal fin spine is elongated and there are three pectoral fin rays which are separate from the fin. The scales on the lateral line are plate like. The upper body is reddish pink, the flanks are iridescent and the lower body is pale. The pectoral fins are dark blue and the other fins are yellowish.[5] The maximum published total length of this species is 50.5 cm (19.9 in).[2]

Distribution and habitat

The Longfin gurnard is found in the Eastern Atlantic Ocean and the Mediterranean Sea.[1] It is rare off southern England,[7] and Ireland[8] The range extends from there south to Mauritania, including the Canary Islands, the Azores and Madeira. It is found in most of the Mediterranean,[1] but is very rare off Turkey[5] and absent from the Far East of that sea. It does not occur in the Black Sea.[1] It is a demersal, benthic fish found on the continental shelf living on soft substrata and among fallen rocks.[1] It is found at depths between 20 and 170 m (66 and 558 ft).[2]

Biology

The longfin gurnard feeds mainly on benthic invertebrates, especially mysids. Its eggs and larvae are planktonic.[5]

Fisheries

The longfin gurnard is not commercially exploited in its Atlantic range, although, it may be caught and eaten as bycatch. However, in the Mediterranean, it is of minor commercial interest. Red gurnards are regularly present in fish markets in Spain, Morocco, Italy, Cyprus and Egypt, and sometimes in France, Greece and Turkey, although it is rarely marketed in Tunisia. The catch is sold fresh, chilled and frozen.[1]

References

  1. ^ a b c d e f Nunoo, F.; Russell, B.; Bannermann, P. & Poss, S. (2015). "Chelidonichthys obscurus". IUCN Red List of Threatened Species. 2015: e.T198753A15597479. doi:10.2305/IUCN.UK.2015-4.RLTS.T198753A15597479.en. Retrieved 16 June 2022.
  2. ^ a b c Froese, Rainer; Pauly, Daniel (eds.). "Chelidonichthys obscura". FishBase. February 2022 version.
  3. ^ Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Species in the genus Chelidonichthys". Catalog of Fishes. California Academy of Sciences. Retrieved 16 June 2022.
  4. ^ Christopher Scharpf & Kenneth J. Lazara, eds. (10 June 2021). "Order Perciformes (Part 12): Suborder Triglioidei: Families Triglidae and Peristediidae". The ETYFish Project Fish Name Etymology Database. Christopher Scharpf and Kenneth J. Lazara. Retrieved 16 June 2022.
  5. ^ a b c d Cemal Turan; Deniz Ergüden; Mevlüt Gürlek (2016). "Critically endangered fish species of Turkish Seas (Mediterranean and Aegean): Longfin gurnard, Chelidonichthys obscurus (Walbaum, 1792)". Natural and Engineering Sciences. 1 (1): 11–15. doi:10.28978/nesciences.286039.
  6. ^ J-C Hureau (ed.). "Longfin gurnard (Aspitrigla obscura)". Fishes of the NE Atlantic and the Mediterranean. Marine Species Identification Portal. Retrieved 15 June 2022.
  7. ^ Gary J. Burt and Jim R. Ellis (2014). "The reappearance of long-finned gurnard Chelidonichthys obscurus (Scorpaeniformes: Triglidae) in the western English Channel". Marine Biodiversity Records. 7 (e47). doi:10.1017/S1755267214000372.
  8. ^ "Longfin Gurnard, Chelidonichthys obscurus". Sea Angling Ireland. Retrieved 17 June 2022.

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