Requiem shark

Requiem sharks
Temporal range:
Tiger shark.jpg
A tiger shark, Galeocerdo cuvier
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Chondrichthyes
Order: Carcharhiniformes
Family: Carcharhinidae
D. S. Jordan & Evermann, 1896
Blacktip reef shark, Carcharhinus melanopterus
Spinner shark, Carcharhinus brevipinna, from the Gulf of Mexico
Galapagos shark, Carcharhinus galapagensis
Lemon shark, Negaprion brevirostris, at Tiger Beach, Bahamas
Blue shark, Prionace glauca

Requiem sharks are sharks of the family Carcharhinidae in the order Carcharhiniformes. They are migratory, live-bearing sharks of warm seas (sometimes of brackish or fresh water) and include such species as the tiger shark, bull shark, lemon shark, spinner shark, blacknose shark, blacktip shark, grey reef shark, blacktip reef shark, silky shark, dusky shark, blue shark, copper shark, oceanic whitetip shark, and whitetip reef shark.

Family members have the usual carcharhiniform characteristics. Their eyes are round, and one or two gill slits fall over the pectoral fin base. Most species are viviparous, the young being born fully developed. They vary widely in size, from as small as 69 cm (2.26 ft) adult length in the Australian sharpnose shark, up to 5.5 m (18 ft) adult length in the tiger shark.[1] Scientists assume that the size and shape of their pectoral fins have the right dimensions to minimize transport cost.[2] Requiem sharks tend to live in more tropical areas, but tend to migrate. Females release a chemical in the ocean in order to let the males know they are ready to mate. Typical mating time for these sharks is around spring to autumn.[3]

Requiem sharks are among the top five species involved in shark attacks on humans;[4] however, due to the difficulty in identifying individual species, a degree of inaccuracy exists in attack records.[5]

  1. ^ Compagno, L.J.V. Family Carcharhinidae - Requiem sharks in Froese, R. and D. Pauly. Editors. 2010. FishBase. World Wide Web electronic publication, version (10/2013).
  2. ^ Iosilevskii, G.; Papastamatiou, Y. P. (2016). "Relations between morphology, buoyancy and energetics of requiem sharks". Royal Society Open Science. 3 (10): 160406. Bibcode:2016RSOS....360406I. doi:10.1098/rsos.160406. PMC 5098981. PMID 27853556.
  3. ^ "Introducing Requiem Sharks". 22 August 2016.
  4. ^ "Species Implicated in Attacks". Florida Museum. 24 January 2018. Retrieved 2 June 2018.
  5. ^ ISAF Statistics on Attacking Species of Shark Archived July 24, 2009, at the Wayback Machine

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