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Sex Differences in the Individual Behaviour of Bait-Attracted White Sharks (Carcharodon carcharias, Linnaeus, 1758) Are Linked to Different Environmental Factors in South Africa.
Azevedo, Olga Mouteira; Correia, Ana Mafalda; Micarelli, Primo; Reinero, Francesca Romana; Rijllo, Giuseppe; Giglio, Gianni; Sperone, Emilio.
Afiliación
  • Azevedo OM; Department of Biology, Ecology and Earth Sciences (DiBEST), University of Calabria, 87036 Rende, Italy.
  • Correia AM; Coastal Biodiversity Laboratory, Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), 4450-208 Matosinhos, Portugal.
  • Micarelli P; Department of Biology, Faculty of Sciences, University of Porto (FCUP), 4169-007 Porto, Portugal.
  • Reinero FR; The Sharks Studies Centre-Scientific Institute, 58024 Massa Marittima, Italy.
  • Rijllo G; The Sharks Studies Centre-Scientific Institute, 58024 Massa Marittima, Italy.
  • Giglio G; Department of Biology, Ecology and Earth Sciences (DiBEST), University of Calabria, 87036 Rende, Italy.
  • Sperone E; Department of Biology, Ecology and Earth Sciences (DiBEST), University of Calabria, 87036 Rende, Italy.
Biology (Basel) ; 11(12)2022 Nov 29.
Article en En | MEDLINE | ID: mdl-36552245
ABSTRACT
The white shark (Carcharodon carcharias) is a charismatic species and, consequently, one of the most studied and protected sharks. This species can be found in a wide range of temperatures and depths, showing site fidelity and migrating across the oceans. This offers a challenge to understanding the processes influencing their lifecycle and, more importantly, assessing anthropogenic disturbances to their populations. These predators' behaviour has been linked to diverse abiotic factors. Here, an ethological approach was used to understand the influence of environmental variables on white shark behaviour. A different environmental impact was found between the activity of females and males toward the bait. Females performed a higher number of behaviours under daylight, lower sea surface temperatures, short wavelets, clear and cloudy skies, under La Niña events, elevated moonlight and high tides. Males behaved with more complexity at dawn, medium sea surface temperatures, large wavelets, few clouds, high tides, and elevated moonlight. The world's aquatic habitats are experiencing significant physiochemical shifts due to human-induced climate change. Knowledge about how white sharks respond to environmental factors is essential to guide management and conservation actions.
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Texto completo: 1 Bases de datos: MEDLINE Idioma: En Revista: Biology (Basel) Año: 2022 Tipo del documento: Article País de afiliación: Italia

Texto completo: 1 Bases de datos: MEDLINE Idioma: En Revista: Biology (Basel) Año: 2022 Tipo del documento: Article País de afiliación: Italia