Results 41 to 50 of about 7,111 (213)

New Evidence for the Contemporary Presence of Juvenile White Sharks (Carcharodon carcharias) in the Adriatic Sea

Fishes
The presence of the white shark (Carcharodon carcharias) in the Mediterranean Sea is well documented, but mainly through historical and opportunistic records.
Patrick L. Jambura, Pero Ugarković, Mišo Pavičić, Ilija Ćetković, Simone Niedermüller, Jürgen Kriwet, Julia Türtscher   +6 more
doaj   +1 more source

Abundance and distribution of the white shark in the Mediterranean Sea

Fish and Fisheries, 2019
AbstractConservation of apex predators is a key challenge both in marine and terrestrial ecosystems. The white shark is a rare but persistent inhabitant of the Mediterranean Sea and it is currently assessed as “critically endangered” in the region. However, the population trends and dynamics of this species in the area are still unknown.
Moro Stefano, Jona-Lasinio Giovanna, Block Barbara, Micheli Fiorenza, De Leo Giulio, Serena Fabrizio, Bottaro Massimiliano, Scacco Umberto, Ferretti Francesco   +8 more
openaire   +3 more sources

Investigating the Predation Risk of Coastal Dolphins via the Presence of Shark Bite Scars Across Southeast Queensland, Australia. [PDF]

Ecol Evol
Shark bite scars were analysed on coastal dolphins in southeast Queensland, Australia to compare the predation risk between species and habitats. Australian humpback dolphins (Sousa sahulensis) exhibited the highest bite rates and individuals found in sheltered waters had higher shark bite scar prevalence than open waters.
Hume GV, Levengood AL, Webster GL, Townsend KA, Peddemors VM, Holmes BJ.   +5 more
europepmc   +2 more sources

Dental crown morphological variation and heterodonty in carcharhiniform sharks

The Anatomical Record, EarlyView.
Abstract Elasmobranch teeth are highly mineralized structures that constitute the majority of the fossil record for this group. Despite their taxonomic and evolutionary significance, detailed descriptions of dental morphology remain scarce. The order Carcharhiniformes, the most diverse among sharks, comprises 304 valid species that display remarkable ...
Flávia Zanini, Karla D. A. Soares
wiley   +1 more source

Antibiotic sensitivity of bacteria isolated from the oral cavities of live white sharks (Carcharodon carcharias) in South African waters

South African Journal of Science, 2019
The white shark (Carcharodon carcharias) is responsible for 49% of shark-related injuries in South Africa, yet no information currently exists on the composition or antibiotic resistance of bacteria hosted by these apex predators in South African waters.
Enrico Gennari, Alison A. Kock, Malcolm J. Smale, Alison Towner, Nasreen Khan, Linda A. Bester, Ryan Johnson, Chris Fischer, Michael Meÿer, Peter Morse   +9 more
doaj   +1 more source

A new species of Lonchidiidae (Hybodontiformes) from the Late Jurassic of Brazil (Aliança Formation, Jatobá Basin)

The Anatomical Record, EarlyView.
Abstract The Aliança Formation (Jatobá Basin) represents lacustrine deposits formed in oxygenated waters that hosted a diverse fauna, including Hybodontiform sharks. Within this group, the Family Lonchidiidae comprises 11 valid genera, with Parvodus previously reported in Brazilian deposits from the Brejo Santo Formation (Araripe Basin, Late Jurassic ...
Larissa de Souza Ribeiro, Marco Aurélio Gallo de França   +1 more
wiley   +1 more source

“Uncertainty remains for white sharks in South Africa, as population stability and redistribution cannot be concluded by Bowlby et al. (2023): “Decline or shifting distribution? a first regional trend assessment for white sharks (Carcharodon carcharias) in South Africa”

Ecological Indicators
Bowlby et al. (2023) assessed spatio-temporal trends in South Africa’s white shark (Carcharodon carcharias) population using a range of different proxies of white shark occurrence.
Enrico Gennari, Neil Hammerschlag, Sara Andreotti, Chris Fallows, Monique Fallows, Matias Braccini   +5 more
doaj   +1 more source

Residency, habitat use and sexual segregation of white sharks, Carcharodon carcharias in False Bay, South Africa. [PDF]

PLoS ONE, 2013
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.
Alison Kock, M Justin O'Riain, Katya Mauff, Michael Meÿer, Deon Kotze, Charles Griffiths   +5 more
doaj   +1 more source

Developmental morphology of claspers and clasper‐glands during maturation in Potamotrygon wallacei (Chondrichthyes: Potamotrygoninae)

The Anatomical Record, EarlyView.
Abstract The claspers are the copulatory organs in male elasmobranchs, responsible for directing the semen into the female cloaca (C). However, the microscopic morphology of the claspers remains poorly understood. This study describes the morphology of the claspers and clasper glands (CGs) of cururu stingray (Potamotrygon wallacei) at different ...
Matheus Samuel Cunha Braga, Grazyelle Sebrenski da Silva, Maria Inês Braga de Oliveira, Jaydione Luiz Marcon, Ruben Dario Morales Gamba   +4 more
wiley   +1 more source

Evidence of maternal offloading of organic contaminants in white sharks (Carcharodon carcharias). [PDF]

PLoS ONE, 2013
Organic contaminants were measured in young of the year (YOY) white sharks (Carcharodon carcharias) incidentally caught in southern California between 2005 and 2012 (n = 20) and were found to be unexpectedly high considering the young age and dietary ...
Christopher G Mull, Kady Lyons, Mary E Blasius, Chuck Winkler, John B O'Sullivan, Christopher G Lowe   +5 more
doaj   +1 more source