Results 31 to 40 of about 1,562 (195)

Whale carcass scavenging by sharks

Global Ecology and Conservation, 2019
Sharks are well known to scavenge whale carcasses, but observations are rare. Here we (1) describe new observations of whale carcass scavenging behaviour by white (Carcharodon carcharias) and tiger (Galeocerdo cuvier) sharks, and (2) review the ...
James P. Tucker, Brett Vercoe, Isaac R. Santos, Mark Dujmovic, Paul A. Butcher   +4 more
doaj   +1 more source

How Close is too Close? The Effect of a Non-Lethal Electric Shark Deterrent on White Shark Behaviour. [PDF]

PLoS ONE, 2016
Sharks play a vital role in the health of marine ecosystems, but the potential threat that sharks pose to humans is a reminder of our vulnerability when entering the ocean.
Ryan M Kempster, Channing A Egeberg, Nathan S Hart, Laura Ryan, Lucille Chapuis, Caroline C Kerr, Carl Schmidt, Charlie Huveneers, Enrico Gennari, Kara E Yopak, Jessica J Meeuwig, Shaun P Collin   +11 more
doaj   +1 more source

An illicit artisanal fishery for North Pacific white sharks indicates frequent occurrence and high mortality in the Gulf of California

Conservation Letters, 2021
Large sharks shape ecosystems across their geographic ranges and have become a top research and conservation priority. Eastern North Pacific (ENP) white shark (Carcharodon carcharias) aggregations off the United States and Mexico are well described, but ...
Daniel J. Madigan, Natalie S. Arnoldi, Nigel E. Hussey, Aaron B. Carlisle   +3 more
doaj   +1 more source

Osteology and utilization of white shark teeth, Carcharodon carcharias (Linnaeus, 1758) (Elasmobranchii, Lamnidae) at shell mounds of São Paulo.

Revista do Museu de Arqueologia e Etnologia, 2003
At Brazilian shell mounds, recoveries of sharks and rays teeth are very common, and their value for the shell mound groups is still under discussion. This choice of working with C.
Manoel M.B. Gonzalez, Sandra Nami Amenomori   +1 more
doaj   +1 more source

Occurrence of White Sharks (Carcharodon carcharias) in Hawaiian Waters

Journal of Marine Biology, 2013
White sharks (Carcharodon carcharias) have been known in Hawaii (~158°W, 22°N) since the time of ancient Hawaiians. We compiled sightings and records from 1926 to the present (4 females, 2 males, and 8 unknown sex; 3.3–4.5 m total length) and compared them with satellite tracking records (7 females, 9 males, and 6 unknown; 3.7–5.3 m total length ...
Kevin Weng, Randy Honebrink
openaire   +1 more source

Shark–seal interaction off South Africa’s west coast during the early Pliocene (5 Ma)

South African Journal of Science, 2021
A study of the Mio-Pliocene marine palaeoenvironment on South Africa’s west coast revealed aspects of the biology and behaviour of fossil marine mammals.
Romala Govender
doaj   +1 more source

Oceanographic conditions associated with white shark (Carcharodon carcharias) habitat use along eastern Australia

, 2022
Oceanographic conditions associated with white shark (Carcharodon carcharias) habitat use along eastern ...
R W Bradford (13302945), V M Peddemors (13302933), A F Smoothey (13302942), K A Lee (13302924), T A Patterson (13302930), Robert Harcourt (8024519), D Harasti (13302939), M Roughan (13302936), P A Butcher (13302927)   +8 more
core   +1 more source

New light on the trophic ecology of Carcharodon hastalis from teeth embedded in Miocene cetacean vertebrae from Calvert Cliffs in Maryland, USA

Acta Palaeontologica Polonica
Recent isotopic analyses of the teeth of the extinct lamnid Carcharodon hastalis showed that it fed at a comparable trophic level as was the fossil and modern great white shark, Carcharodon carcharias. Although there are many examples of shark bite marks
Stephen J. Godfrey, Victor J. Perez, Marcus Jones, Phillip F. Chapman, Nathan Spencer, Jason E. Osborne   +5 more
doaj   +1 more source

Trace elements and isotopes analyses on historical samples of white sharks from the Mediterranean Sea

The European Zoological Journal, 2021
The white shark Carcharodon carcharias has been present in the Mediterranean Sea since 3.2 million years ago. Nevertheless, the current population shows a low genetic variability suggesting an endangered small population, on which there is scarce ...
L. Bevacqua, F. R. Reinero, E. E. Becerril-García, F. R. Elorriaga-Verplancken, D. Juaristi-Videgaray, P. Micarelli, F. Galván-Magaña, P. Curiel-Godoy, G. Giglio, S. Tripepi, D. Barca, E. Sperone   +11 more
doaj   +1 more source

Detecting Southern California’s White Sharks With Environmental DNA

Frontiers in Marine Science, 2018
To improve ability to detect white sharks without the need for tags, or visual census, we developed a species-specific environmental DNA (eDNA) assay that targets a 163 bp fragment of the white shark (Carcharodon carcharias) mitochondrial cytochrome B ...
Kevin D. Lafferty, Kevin D. Lafferty, Kasey C. Benesh, Andrew R. Mahon, Christopher L. Jerde, Christopher G. Lowe   +5 more
doaj   +1 more source