Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1136/emermed-2014-204070 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Counterillumination reduces bites by Great White sharks.
Curr Biol
December 2024
School of Natural Sciences, Macquarie University, North Ryde, NSW 2109, Australia. Electronic address:
In the open ocean, achieving camouflage is complicated by the fact that the downwelling light is generally much brighter than the upwelling light, which means that any object, even if its ventral surface is white due to countershading, will appear as a dark silhouette when viewed from below. To overcome this, many marine species employ counterillumination, whereby light is emitted from photophores on their ventral surface to replace the downwelling light blocked by their body. However, only a single behavioral study has tested the efficacy of counterillumination as an anti-predation strategy.
View Article and Find Full Text PDFOceanic whitetip shark cookies: Evidence of multiple predation events by an opportunistic mesopelagic predator on a large epipelagic shark.
J Fish Biol
December 2024
Department of Biological Sciences, Florida International University, North Miami, Florida, USA.
In June 2024, a large female oceanic whitetip shark (Carcharhinus longimanus) was observed near San Andres Island, Colombia, bearing at least 41 healed circular scars on its skin. These scars, resembling those left by cookiecutter sharks on large teleost species, suggest repeated predation events. Cookiecutter sharks typically leave one or two bite marks per prey item, with a small percentage showing five or more marks.
View Article and Find Full Text PDFUse of presence vs absence of symphyseal teeth in jaws for the forensic analysis of bites by large traumatogenic shark species.
J Forensic Sci
November 2024
Australian Museum, Sydney, Australia.
Identifying the species of shark responsible for a bite on humans is both complex and important for understanding and managing the shark risk. Depending on the species, tiny teeth may or may not be present in the symphyseal space at the junction of the upper and lower half-jaws. In the case of bites, these tiny teeth (if present) often leave specific marks that may enable species to be quickly and reliably distinguished.
View Article and Find Full Text PDFArticle Synopsis
- Research on interactions between sharks and cetaceans is limited, but a new video shows a shortfin mako shark circling a finless porpoise with a damaged tail.
- The porpoise appeared healthy but couldn't swim properly due to the injury, and evidence like a bite mark indicates it may have been attacked by the shark.
- This observation suggests that mako sharks might hunt live cetaceans more frequently than previously believed, despite mostly feeding on small fish and cephalopods.
Personal electric deterrents can reduce shark bites from the three species responsible for the most fatal interactions.
Sci Rep
July 2024
Southern Shark Ecology Group, College of Science and Engineering, Flinders University, Adelaide, SA, 5042, Australia.
The frequency of unprovoked shark bites is increasing worldwide, leading to a growing pressure for mitigation measures to reduce shark-bite risk while maintaining conservation objectives. Personal shark deterrents are a promising and non-lethal strategy that can protect ocean users, but few have been independently and scientifically tested. In Australia, bull (Carcharhinus leucas), tiger (Galeocerdo cuvier), and white sharks (Carcharodon carcharias) are responsible for the highest number of bites and fatalities.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!