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This decline has been attributed to fishing pressure, to which this species may be highly vulnerable as large, deep-sea sharks generally have slow growth rates and long lifespans. [ 4 ] [ 9 ] Regarding the species as a whole, the International Union for Conservation of Nature (IUCN) assesses it as Endangered. [ 1 ]
The terms can be used somewhat interchangeably, as all vulnerable species are threatened, all endangered species are vulnerable and threatened, and all critically endangered species are endangered, vulnerable and threatened. Threatened species are also referred to as a red-listed species, as they are listed in the IUCN Red List of Threatened ...
Cross-species social hierarchies exist. For example, oceanic whitetip sharks dominate silky sharks of comparable size during feeding. [72] When approached too closely some sharks perform a threat display. This usually consists of exaggerated swimming movements, and can vary in intensity according to the threat level. [86]
According to a January 2021 study in Nature which studied 31 species of sharks and rays, the number of these species found in open oceans had dropped by 71 per cent in around 50 years. The oceanic whitetip was included in the study. [34] [35] Oceanic whitetip sharks are mainly threatened by fisheries, sometimes intentional but usually bycatch.
Innocuous to humans and hardy in captivity, zebra sharks are popular subjects of ecotourism dives and public aquaria. The World Conservation Union has assessed this species as Endangered worldwide, as it is taken by commercial fisheries across most of its range (except off Australia) for meat, fins, and liver oil. There is evidence that its ...
Scientists in the Cayman Islands are working to conserve the species and provide a haven for it in the Caribbean. Rare on-screen glimpse of critically endangered oceanic whitetip shark Skip to ...
The pelagic thresher (Alopias pelagicus) is a species of thresher shark, family Alopiidae; this group of sharks is characterized by the greatly elongated upper lobes of their caudal fins. The pelagic thresher occurs in the tropical and subtropical waters of the Indian and Pacific Oceans , usually far from shore, but occasionally entering ...
"We have to think about it in terms of the food web that's out in the ocean: Ultimately, at the very top of that cycle of life are the sharks and if we removed the sharks, smaller fish species ...