Predatory behaviour of white sharks (Carcharodon carcharias) at Seal Island, South Africa
نویسندگان
چکیده
*Fish Museum, Zoology Department, University of British Columbia, 6270 University Boulevard,Vancouver, BC,V6T 1Z4, Canada. ReefQuest Centre for Shark Research, PO Box 48561, 595 Burrard Street,Vancouver, BC,V7X1A3, Canada. Pew Institute for Ocean Science, Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL 33149, USA. Shark Research Committee, PO Box 3483,Van Nuys, CA 97407, USA. Apex Expeditions, 14 ThibaultWalk, Marina Da Gama, 7945 CapeTown, South Africa. Corresponding author, e-mail: [email protected]
منابع مشابه
Hunting patterns and geographic profiling of white shark predation
Predators can play important roles in structuring their communities through topdown effects on the distribution and abundance of their prey. Sharks are top predators in many marine communities, yet few studies have quantified those factors influencing their distribution and hunting behaviour. Here, we use location data from 340 predatory interactions between white sharks Carcharodon carcharias ...
متن کاملResidency, Habitat Use and Sexual Segregation of White Sharks, Carcharodon carcharias in False Bay, South Africa
White sharks (Carcharodon carcharias) are threatened apex predators and identification of their critical habitats and how these are used are essential to ensuring improved local and ultimately global white shark protection. In this study we investigated habitat use by white sharks in False Bay, South Africa, using acoustic telemetry. 56 sharks (39 female, 17 male), ranging in size from 1.7-5 m ...
متن کاملEffects of an Electric Field on White Sharks: In Situ Testing of an Electric Deterrent
Elasmobranchs can detect minute electromagnetic fields, <1 nV cm(-1), using their ampullae of Lorenzini. Behavioural responses to electric fields have been investigated in various species, sometimes with the aim to develop shark deterrents to improve human safety. The present study tested the effects of the Shark Shield Freedom7™ electric deterrent on (1) the behaviour of 18 white sharks (Carch...
متن کاملMarine predator–prey contests: Ambush and speed versus vigilance and agility
Differences in relative strengths and weaknesses between predators and prey under tactical contexts result in complex and dynamic contests between them. These contests are often brief and difficult to observe in marine systems. Here, we employ basic principles of underwater optics and physics to provide a conceptual understanding of mechanisms underlying predator prey interactions between white...
متن کاملEffects of provisioning ecotourism activity on the behaviour of white sharks Carcharodon carcharias
Ecotourism operations which provide food to large predators have the potential to negatively affect their target species, by conditioning them to associate humans with food, or by generally altering their behavioural patterns. This latter effect could have potentially detrimental consequences for the ecosystem inhabited by the predator, because any behavioural changes could affect the species w...
متن کامل