Spaten-nosed shark

Spaten-nosed shark
	Spade-nosed shark ( Scoliodon laticaudus ) from the first description by Müller & Henle, 1838
Systematics
	Sharks (selachii)
Superordinate :	Galeomorphii
Order :	Ground Sharks (Carcharhiniformes)
Family :	Requiem sharks (Carcharhinidae)
Genre :	Spaternose Sharks ( Scoliodon )
Type :	Spaten-nosed shark
Scientific name
	Scoliodon laticaudus
	Müller & Henle , 1838

The spadenose shark ( Scoliodon laticaudus ) is a type in the genus Scoliodon within the Requiem sharks (Carcharhinidae). The species is distributed in large parts of the Indian Ocean from Tanzania to India and in the Red Sea .

Appearance and characteristics

Head from below

The spade-nosed shark is a slender shark with a maximum body length of 75 cm and average sizes between 50 and 60 cm. He has a bronze to gray back color and a light belly without pattern. It resembles the blue sharks of the genus Carcharhinus in habit , but has a noticeably elongated and spade-shaped snout region. It has an anal fin and two dorsal fins , the second dorsal fin being significantly smaller than the first and the anal fins. He has no spray hole and the eyes are relatively small with nodding skins. The first dorsal fin is triangular in shape and starts clearly behind the pectoral fins. The rear end of the first dorsal fin lies over the pelvic fins. The anal fin is much larger than the second dorsal fin.

Way of life

The spade-nosed shark is a shallow-water species and predatory feeds on various fish , especially soil types. The sharks are viviparous and form a yolk sac placenta ( placental viviparous ). The females get between one and 14 young animals with a length of about 13 to 15 cm in one litter. The spade-nose sharks can sometimes appear very frequently and form schools.

distribution

Distribution areas of the genus Scoliodon

The species is common in large parts of the Indian Ocean from Tanzania to India and Sri Lanka . This is a shallow water inhabitant of the continental shelf who prefers stony grounds. The spade-nosed sharks in the West Pacific from Japan to Indonesia and the Philippines are Scoliodon macrorhynchos , while those in the Bay of Bengal are a third, previously undescribed species, or Scoliodon muelleri , which has been synonymous with Scoliodon laticaudus .

literature

Kuno Sch. Steuben : The sharks of the seven seas: species, way of life and sporting catch. Parey, Berlin 1989, ISBN 3-490-44314-4 , p. 59.

Individual evidence

↑ LJV Compagno, WT White, PR Last: Scoliodon macrorhynchos (Bleeker, 1852), a second species of spadenose shark from the western Pacific (Carcharhiniformes: Carcharhinidae) . In: PR Last, WT White, JJ Pogonoski (Ed.): Descriptions of new Australian Chondrichthyans . CSIRO Marine and Atmospheric Research, 2008, ISBN 978-1-921424-18-2 , pp. 61-76 .

Web links

Commons : Spaten-nosed shark ( Scoliodon laticaudus ) - Collection of images, videos and audio files

Scoliodon laticaudus inthe IUCN 2013 Red List of Threatened Species . Posted by: Simpfendorfer, C., 2005. Retrieved September 24, 2013.

Species portrait on hai.ch

Spade Nose Shark on Fishbase.org (English)

[1] LJV Compagno, WT White, PR Last: Scoliodon macrorhynchos (Bleeker, 1852), a second species of spadenose shark from the western Pacific (Carcharhiniformes: Carcharhinidae) . In: PR Last, WT White, JJ Pogonoski (Ed.): Descriptions of new Australian Chondrichthyans . CSIRO Marine and Atmospheric Research, 2008, ISBN 978-1-921424-18-2 , pp. 61-76 .