Feeding strategy of the night shark (Carcharhinus signatus) and scalloped hammerhead shark (Sphyrna lewini) near seamounts off northeastern Brazil

Authors

  • Teodoro Vaske Júnior Universidade Federal de Pernambuco; Departamento de Pesca e Aquicultura
  • Carolus Maria Vooren Universidade Federal do Rio Grande; Departamento de Oceanografia; Laboratório de Elasmobrânquios e aves marinhas
  • Rosangela Paula Lessa Universidade Federal de Pernambuco; Departamento de Pesca e Aquicultura

DOI:

https://doi.org/10.1590/S1679-87592009000200002

Keywords:

Feeding aggregations, Seamounts, Carcharhinus signatus, Sphyrna lewini

Abstract

A total of 425 stomachs of night shark (Carcharhinus signatus), and 98 stomachs of scalloped hammerhead shark (Sphyrna lewini), from longline and surface gillneters near seamounts off northeastern Brazil, were analysed between 1992 and 1999. Both predators prey upon reef and benthopelagic fishes, migrant cephalopods and deep water crustaceans, showing similar feeding niches (Schoener Index T=0.75). The great prey richness of the diets may reflect the fact that the marine food web for these species is very extensive in this region. Due to the concentration for feeding of both predators in the seamounts, intense fisheries should be monitored to avoid localised depletions.

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Published

2009-06-01

Issue

Vol. 57 No. 2 (2009)

Section

naodefinida

How to Cite

Feeding strategy of the night shark (Carcharhinus signatus) and scalloped hammerhead shark (Sphyrna lewini) near seamounts off northeastern Brazil. (2009). Brazilian Journal of Oceanography, 57(2), 97-104. https://doi.org/10.1590/S1679-87592009000200002