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Image of Carolina hammerhead

Carolina Hammerhead

Sphyrna gilberti Quattro, Driggers Iii, Grady, Ulrich & Roberts 2013

Diagnostic Description

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This species is distinguished from its congeners by having a head length greater than 20% of STL (stretched total length); cephalofoil has median indentation; with inner narial groove; pelvic fins with straight rear margins; 91 or fewer precaudal vertebrae (Ref. 94083).
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Migration

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Oceanodromous. Migrating within oceans typically between spawning and different feeding areas, as tunas do. Migrations should be cyclical and predictable and cover more than 100 km.
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Biology

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Measurements given in STL, stretch total length (Ref. 94083).
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Carolina hammerhead

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The Carolina hammerhead (Sphyrna gilberti) is a species of hammerhead shark, and part of the family Sphyrnidae, found in the western Atlantic Ocean. Their pupping grounds are in nearshore waters off the southeastern U.S. with the highest concentrations found in Bulls Bay, South Carolina.[3] The Carolina hammerhead has also been found in nearshore waters off of Brazil.[4] It was formally described in 2013.[5]

Little is known about the habits of the species. It is a sister species to S. lewini. The Carolina hammerhead is named in honor of Carter Gilbert, who unknowingly recorded the first known specimen of the shark off Charleston, South Carolina, in 1967.[6] Dr. Gilbert, who was the curator of the Florida Museum of Natural History from 1961–1998, caught what he believed was an anomalous scalloped hammerhead shark with 10 fewer vertebrae than a typical scalloped hammerhead. It was not confirmed to be a different species altogether until Quattro's discovery in 2013.

References

  1. ^ VanderWright, W.J.; Carlson, J.; Pollom, R.; Dulvy, N.K. (2020). "Sphyrna gilberti". IUCN Red List of Threatened Species. 2020: e.T152783714A172115852. doi:10.2305/IUCN.UK.2020-3.RLTS.T152783714A172115852.en. Retrieved 19 May 2023.
  2. ^ "Appendices | CITES". cites.org. Retrieved 14 January 2022.
  3. ^ Barker, A.M.; Frazier, B.S.; Portnoy, D.S. (2021). "Distribution and relative abundance of scalloped (Sphyrna lewini) and Carolina (S. gilberti) hammerheads in the western North Atlantic Ocean". Fisheries Research. 242: 106039. doi:10.1016/j.fishres.2021.106039.
  4. ^ Pinhal, D. (2012). "Cryptic hammerhead shark lineage occurrence in the western South Atlantic revealed by DNA analysis". Marine Biology. 159 (4): 829-836. doi:10.1007/s00227-011-1858-5. S2CID 3954990.
  5. ^ Quattro, J.M.; Driggers, W.B. III; Grady, J.M.; Ulrich, G.F. & Roberts, M.A. (2013). "Sphyrna gilberti sp. nov., a new hammerhead shark (Carcharhiniformes, Sphyrnidae) from the western Atlantic Ocean" (PDF). Zootaxa. 3702 (2): 159–178. doi:10.11646/zootaxa.3702.2.5. PMID 26146715.
  6. ^ "The Carolina hammerhead, a new species of shark". University of South Carolina.
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Carolina hammerhead: Brief Summary

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The Carolina hammerhead (Sphyrna gilberti) is a species of hammerhead shark, and part of the family Sphyrnidae, found in the western Atlantic Ocean. Their pupping grounds are in nearshore waters off the southeastern U.S. with the highest concentrations found in Bulls Bay, South Carolina. The Carolina hammerhead has also been found in nearshore waters off of Brazil. It was formally described in 2013.

Little is known about the habits of the species. It is a sister species to S. lewini. The Carolina hammerhead is named in honor of Carter Gilbert, who unknowingly recorded the first known specimen of the shark off Charleston, South Carolina, in 1967. Dr. Gilbert, who was the curator of the Florida Museum of Natural History from 1961–1998, caught what he believed was an anomalous scalloped hammerhead shark with 10 fewer vertebrae than a typical scalloped hammerhead. It was not confirmed to be a different species altogether until Quattro's discovery in 2013.

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