SharkScience

🚨Advice release - Spurdog management

ICES response to the joint @ec.europa.eu-UK Department for Environment, Food and Rural Affairs (Defra) request for projected effects of different management scenarios for spurdog has been released today doi.org/10.17895/ice...

📷Doug Costa, NOAA/SBNMS

Effects of capture method and handling time on the physiological stress responses of a benthic elasmobranch Marine animals are increasingly exposed to anthropogenic disturbances that disrupt their behaviour and induce physiological stress. In vertebrates, st…

Effects of capture method and handling time on the physiological stress responses of a benthic elasmobranch 🦑🧪🐟🦈 www.sciencedirect.com/science/arti...

Deep-sea mining risks for sharks, rays, and chimaeras 🦑🌿🐟🦈 www.cell.com/current-biol...

Acoustic telemetry provides mortality estimates for threatened river sharks in the Northern Territory, Australia - Animal Biotelemetry Natural mortality can be used as a measure of a species’ resilience and is widely used in the management of fish species. Natural mortality can be calculated using life history parameters, although this is often not possible for data-poor species. Acoustic telemetry provides an accurate alternative to estimate natural mortality based on relocations over time. Northern Australia’s river sharks, the Northern River Shark (Glyphis garricki) and Speartooth Shark (G. glyphis), are two rare and threatened species occurring in rivers, estuaries, and inshore marine waters. This study aimed to use acoustic telemetry to estimate natural mortality across a range of size classes and explore the effect of size class, season, and location on mortality rates. An acoustic receiver array was deployed in rivers of Van Diemen Gulf, Northern Territory, Australia. Detections from 185 sharks between 2013 and 2024 were converted into capture histories, which were used to calculate yearly and monthly estimates of mortality. Data demonstrate that river sharks experience high rates of mortality. Younger individuals had significantly higher rates of mortality, with G. glyphis and G. garricki neonates experiencing average yearly mortality rates of 0.898 and 0.731, respectively, compared with 0.120 and 0.233 in subadults/adults. Although mortality was highly variable temporally, over months and years, there were no significant differences between seasons, years or location, and there was no significant difference between species. Results indicate that river sharks in Van Diemen Gulf likely have very limited capacity to recover from population decline and are therefore vulnerable to environmental change and anthropogenic threats. Population monitoring and habitat management is critical to ensure the persistence of river sharks into the future.

Acoustic telemetry provides mortality estimates for threatened river sharks in the Northern Territory, Australia 🦑🧪🐟🌿 animalbiotelemetry.biomedcentral.com/articles/10....

A 15-Year Time Series Shows Major Declines in Whale
Sharks in Southern Mozambique 🦑🧪🐟🦈 onlinelibrary.wiley.com/doi/pdf/10.1...

A new trend has surfaced among sharks in Cape Cod waters. Here's what one expert says Researchers have been studying white sharks on Cape Cod for nearly two decades, and they've been noticing some changing habits over the last couple of years following what seems like an explosion of s...

A new trend has surfaced among sharks in Cape Cod waters. Here's what one expert says 🦑🌿🐟🦈 www.nbcboston.com/news/local/s...

Shark hotspot: Drivers for distribution and conservation in a tropical oceanic archipelago of the Atlantic Ocean Sharks play an essential role in maintaining the health of ecosystems, but many species are endangered and have locally disappeared around the world. …

Shark hotspot: Drivers for distribution and conservation in a tropical oceanic archipelago of the Atlantic Ocean 🦑🧪🐟🦈 www.sciencedirect.com/science/arti...

YouTube video by FishEvolutionLab-Edu Why did some fishes evolve to be warm-blooded? - Dahiana Arcila and Fernando Melendez

🐟 Not all fish are cold-blooded! New research led by @arciladk.bsky.social, curator of the Marine Vertebrate Collection & recent PhD grad Fernando Melendez, explores how ecological interactions + evolutionary innovation reshaped life in the ocean. 🌊

Rapid DNA/eDNA‐Based ID Tools for Improved Chondrichthyan Monitoring and Management Rapid DNA/eDNA-based ID tools, which detect specific genetic patterns without requiring sequencing, are essential for biodiversity and wildlife trade monitoring, particularly for species of conservat....

Rapid DNA/eDNA-Based ID Tools for Improved
Chondrichthyan Monitoring and Management 🦑🧪🐟🦈 onlinelibrary.wiley.com/doi/pdf/10.1...

Observation of group courtship/copulating behavior for free-living Indo-Pacific Leopard sharks, Stegostoma tigrinum - Journal of Ethology Reproductive behaviors in wild sharks remain largely undocumented, yet they are critical for understanding population dynamics and informing conservation strategies. The Indo-Pacific Leopard shark (St...

Observation of group courtship/copulating behavior for free-living Indo-Pacific Leopard sharks, Stegostoma tigrinum 🦑🌎🌿🐟🦈 link.springer.com/article/10.1...

Ontogenetic feeding ecology of the silky shark (Carcharhinus falciformis) in the Colombian eastern tropical Pacific - Environmental Biology of Fishes The study of the feeding ontogeny of large predators is complex due to their high mobility, which leaves a part of their life cycle poorly understood (spatio-temporal variation). This study describes ...

Ontogenetic feeding ecology of the silky shark (Carcharhinus falciformis) in the Colombian eastern tropical Pacific 🦑🧪🐟🦈 link.springer.com/article/10.1...

New species of lanternshark

Etmopterus westraliensis, a new species of lanternshark (Squaliformes: Etmopteridae) from Western Australia, with redescription of Etmopterus brachyurus 🦑🐟🌿🦈 onlinelibrary.wiley.com/doi/10.1111/...

The use of acoustic and satellite telemetry to study elasmobranchs in Latin America: past efforts and future directions 🦑🌎🐟🦈 cienciasmarinas.com.mx/index.php/cm...

Scientists tap 'secret' fresh water under the ocean, raising hopes for a thirsty world Scientists conducting a first-of-its-kind drilling operation have extracted samples of fresh water hiding in massive reservoirs deep under the ocean.

Scientists tap ‘secret’ fresh water under the ocean off Cape Cod, raising hopes for a thirsty world. 🌎🌿🦑🧪 apnews.com/article/fres...

A PR makeover for sharks (think ‘Jaws’) could do a whole lot of good for the ocean The film 'Jaws' has historically given sharks a bad rap, but the 50th anniversary can breathe new life into caring about the ocean.

A public relations makeover for sharks (think ‘Jaws’) could do a whole lot of good for the ocean 🦑🌎🐟🦈 www.latimes.com/environment/...

Groovebelly stingray via inaturalist.org

Should stingrays be on the menu? Significant human health risks associated to the consumption of the endangered Groovebelly Stingray (Dasyatis hypostigma) in southeastern Brazil 🦑🌿🦈🐟 www.sciencedirect.com/science/arti...

White shark dorsal fin (and pectoral fins)

Drone observations reveal white shark (Carcharodon carcharias) dorsal fins are highly flexible and possible investigatory structures 🦑🐟🦈 onlinelibrary.wiley.com/doi/10.1111/...

Shark products

Sale of critically endangered sharks in the United States 🦑🌎🌿🐟🦈 www.frontiersin.org/journals/mar...

Elasmobranch bycatch in Russian fisheries in the Pacific Ocean Abstract. The official data on Russian catch of sharks, rays and skates in the Pacific region over the last 45 years are analyzed. For Russian fishermen th

Elasmobranch bycatch in Russian fisheries in the Pacific Ocean 🦑🌎🐟🌿 academic.oup.com/icesjms/arti...

Nearshore essential habitat of threatened sharks around a temperate oceanic island @meps-ir.bsky.social 🦑🌎🐟🦈 www.int-res.com/abstracts/me...

We are big supporters of this Massachusetts State Flag entry for the new state flag design (could use a few more gill slits, but it’s impressive…). 🦈🐟

Species-specific patterns of metal accumulation in deep-sea sharks 🦑🌎🐟🦈 www.sciencedirect.com/science/arti...

Revealing the unseen: Shark finning in the Galapagos Marine Reserve through illegal fishers' eyes and a situational crime prevention approach 🦑🌎🌿🐟🦈 www.sciencedirect.com/science/arti...

Differences in juvenile white sharks’ (Carcharodon carcharias) resource use in southern California waters Context The white shark (Carcharodon carcharias) is a marine predator with a global distribution, ranging from neritic to oceanic waters. In the Southern California Bight (SCB), juvenile white sharks ...

Differences in juvenile white sharks’ (Carcharodon carcharias) resource use in southern California waters 🦑🌿🐟🦈 www.publish.csiro.au/WR/WR24183

Sharks Aren't Lingering in Local Waters, UNH Researchers Find White sharks appear to be using New Hampshire waters as “a bit of a highway to get further up the coast,” says researcher Nathan Furey, a conclusion based on data gathered from a partnership with the ...

White Sharks Aren't Lingering in Local New Hampshire Waters, UNH Researchers Find 🦑🌎🐟🦈 www.unh.edu/unhtoday/202...

Dusky sharks actively prey on gray seals - Environmental Biology of Fishes Large sharks are among the only known predators of marine mammals, but few direct observations of sharks preying on marine mammals have been recorded. Here, we present novel aerial observations of a d...

Dusky sharks actively prey on gray seals off Nantucket, Massachusetts 🦑🌿🐟🦈 link.springer.com/article/10.1...

Newborn sharks swim like ‘ninjas’ to avoid predator attacks New research shows that baby blacktip reef sharks use warm waters to boost their escape performance from adult sharks, barracudas and other predators.

Newborn reef sharks are ninja swimmers! 🥷🦈⚡️ Our latest study shows pups can dodge predators in under 20ms. A reminder of how amazing—and vulnerable—shark nursery habitats are. Read more via @jcuofficial.bsky.social : www.jcu.edu.au/news/release...

Great white sharks head north, following seals and alarming beachgoers Boaters, beachgoers and fishermen like Clough who spend time in the chilly waters of New England and Atlantic Canada are learning to live with great white sharks, the creatures made famous by the 1975...

White sharks head north, following seals and alarming beachgoers 🦑🌎🐟🦈 www.ctvnews.ca/climate-and-...

New paper introducing the term of SUPER HABITAT for sharks in which all critical activities (resting, feeding, mating & giving birth) occurs.
🦈🌴❤️🍽️ 👶
Access the paper here:
www.sciencedirect.com/science/arti...
@dr-yannis.bsky.social @charlie-huveneers.bsky.social

An ecological risk assessment for the impacts of offshore wind farms on sharks and rays in Australia Sharks and rays play pivotal ecological roles in marine ecosystems, and globally, 32.6% of shark, ray and chimera species are considered to be threate…

An ecological risk assessment for the impacts of offshore wind farms on sharks and rays in Australia 🦑🌎🐟🦈 www.sciencedirect.com/science/arti...