Gurnards

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Gurnards
Bellator militaris

Bellator militaris

Systematics
Sub-cohort : Neoteleostei
Acanthomorphata
Spinefish (Acanthopterygii)
Perch relatives (Percomorphaceae)
Order : Perch-like (Perciformes)
Family : Gurnards
Scientific name
Triglidae
Risso , 1826

The gurnards (Triglidae) are a family of bottom-dwelling marine fish. They occur in all shelf seas and prefer to live on sandy or soft ground, where they poke for food with their elongated fin rays. The animals live in water depths of up to 400 meters. The family is named for its ability to make growling or grunting noises. The fish generate these noises by means of a muscle that makes the two-chambered swim bladder vibrate. The diet of the gurnards consists of small fish, crustaceans and mollusks .

features

Typical of the gurnards are the lower two to three rays of the pectoral fins , which are filled with taste cells and transformed into tactile organs , with which the gurnards can also trip short distances over the seabed. The pectoral fins are large, wing-like and their edge is often strikingly blue in color. They are spread apart during courtship and threatening and serve as wings during swimming.

The shape of the head and the large, wide, terminal mouth are also striking . The lips are fleshy, the teeth brush-like on the jaws and roof of the mouth. The head is armored with numerous bars and the gill and front gill covers are studded with spines. There may be two rostral processes on the snout. Gurnards are ten to 75 centimeters long, depending on the species.

The dorsal fin is divided, the first hard-radiating dorsal fin is much shorter and higher than the second soft-rayed. The bases of the dorsal fins are protected with pointed shields. The caudal fin is large and indented. The pelvic fins are on the chest. Gurnards are often reddish, but also silvery or dark in color.

Fin formula : dorsal 1 VII – XI, dorsal 2 10–23, anal 0 – I / 11–23, caudal 9–10

Gurnards are valued food fish .

Internal system

There are four subfamilies and 15 genera with around 170 species. The armored searobin which originally applied as an independent family will, as a sister group to a clade assigned by Pterygotriglinae and Triglinae recently the Knurrhähnen as a fourth subfamily.

Triglidae cladogram :
 Triglidae 

Prionotinae


   


Triglinae


   

Pterygotriglinae



   

Armored gurnards  (Peristediinae)




Subfamily Prionotinae

In the subfamily Prionotinae, the lateral line on the tail is not forked. A ligament (Baudelot's ligament) connects the upper end of the shoulder girdle with the back of the skull. 26 vertebrae.

Subfamily Pterygotriglinae

Subfamily Triglinae

Red gurnard ( Chelidonichthys lucerna )
Gray gurnard ( Eutrigla gurnardus )
Lepidotrigla vanessa
Lyre gurnard ( Trigla lyra )
Striped gurnard ( Trigloporus lastoviza )

Subfamily Armored Gurnards (Peristediinae)

literature

  • Joseph S. Nelson : Fishes of the World . John Wiley & Sons, 2006, ISBN 0-471-25031-7
  • Kurt Fiedler: Textbook of Special Zoology, Volume II, Part 2: Fish . Gustav Fischer Verlag Jena, 1991, ISBN 3-334-00339-6
  • Bent J. Muus, Jørgen G. Nielsen: The marine fish of Europe in the North Sea, Baltic Sea and Atlantic. Kosmos, Stuttgart 1999, ISBN 3-440-07804-3 .

Individual evidence

  1. Smith, WL, Everman, E. & Richardson, C. (2018): Phylogeny and Taxonomy of Flatheads, Scorpionfishes, Sea Robins, and Stonefishes (Percomorpha: Scorpaeniformes) and the Evolution of the Lachrymal Saber. Copeia 106 (1): 94-119. 2018 doi: 10.1643 / CG-17-669
  2. David S. Portnoy, Stuart C. Willis, Elizabeth Hunt, Dominic G. Swift, John R. Gold, Kevin W. Conway: Molecular phylogenetics of New World searobins (Triglidae; Prionotinae). Molecular Phylogenetics and Evolution, November 2016, doi: 10.1016 / j.ympev.2016.11.017

Web links

Commons : Gurnards  - Collection of images, videos and audio files
Wiktionary: Knurrhahn  - explanations of meanings, word origins, synonyms, translations