SharkScience

From hormones to habitat: A new framework for assessing maturity in the Central-Eastern Mediterranean blue shark (Prionace glauca) population 🦑🧪🐟🦈 www.sciencedirect.com:5037/science/arti...

Age and growth of spinner sharks, Carcharhinus brevipinna, in the western North Atlantic Ocean - Environmental Biology of Fishes The age and growth of the spinner shark, Carcharhinus brevipinna, was investigated throughout its range in coastal waters of the western North Atlantic Ocean off the United States. A total of 769 vert...

Age and growth of spinner sharks, Carcharhinus brevipinna, in the western North Atlantic Ocean 🦑🧪🐟🦈 link.springer.com/article/10.1...

Assessing tourism compliance challenges at one of the largest whale shark aggregation sites in the world Whale shark (Rhincodon typus) tourism is a growing industry, particularly at “El Azul” off the Yucatán coast of Mexico, one of the largest known whale shark aggregation sites. Using aerial video fo...

Assessing tourism compliance challenges at one of the largest whale shark aggregation sites in the world 🦑🌿🐟🦈 www.tandfonline.com/doi/full/10....

A comprehensive reassessment of the reproductive output of the narrownose smooth-hound shark (Mustelus schmitti) - Hydrobiologia This study estimated the reproductive output of the Mustelus schmitti shark in relation to female body size. Maturity and first maternity ogives, litter size, and follicular and embryonic growth dynam...

A comprehensive reassessment of the reproductive output of the narrownose smooth-hound shark (Mustelus schmitti) 🦑🌿🐟🦈 link.springer.com/article/10.1...

Juvenile tarpon - Florida

‘Enormous’ Tarpon (Megalops atlanticus) - Indian River Lagoon, Florida. 🦑🦈🐟

Positive steps forward for many species. A clear set of challenges continue to include effective monitoring and enforcement.

Blue shark CT scans of swordfish interactions

Pathology of stranded blue sharks (Prionace glauca) impaled by swordfish (Xiphias gladius) 🦑🌿🐟🦈 www.nature.com/articles/s41...

Network analysis of decadal acoustic detections reveals diverse movement behavior in a large marine predator (Carcharhinus leucas) - Bull Shark 🦑🐟🦈 www.int-res.com/abstracts/me...

Relative abundance and diversity of sharks and predatory fishes across Marine Protected Areas of the Tropical Eastern Pacific Marine Protected Areas (MPAs) in the Tropical Eastern Pacific (TEP) support globally distinct reef fish populations, which exhibit differences between the remote oceanic islands and continental coast....

Relative abundance and diversity of sharks and predatory fishes across Marine Protected Areas of the Tropical Eastern Pacific 🦑🌿🐟🦈 journals.plos.org/plosone/arti...

Mysterious deepwater sharks, killed to make cosmetics, are granted new trade protections in ‘watershed moment’ | CNN A proposal to regulate international trade of gulper sharks could help to save the species.

Mysterious deepwater sharks, killed to make cosmetics, are granted new trade protections in ‘watershed moment’ 🦑🌿🐟🦈 www.cnn.com/science/deep...

Microplastic existence in two feeding zones of whale shark (Rhincodon typus) in Gulf of California, Mexico 🦑🌎🐟🦈 www.sciencedirect.com:5037/science/arti...

Rare Aggregations: Seasonal Variations and Abundance
of the Critically Endangered Widenose Guitarfish
(Glaucostegus obtusus) 🦑🌿🐟🦈 onlinelibrary.wiley.com/doi/10.1002/...

Pelagic sharks target long‐lived, retentive anticyclonic eddies in the Northwest Atlantic Ocean Open ocean ecosystems represent the largest habitat on Earth and are highly dynamic in time and space. Mesoscale eddies are a primary driver of this variability and serve a key structural role in oce....

Pelagic sharks target long‐lived, retentive anticyclonic eddies in the Northwest Atlantic Ocean - Limnology and Oceanography 🦑🧪🐟🦈 aslopubs.onlinelibrary.wiley.com/doi/abs/10.1...

Elevated sea surface temperatures drive greater seasonal depth use in a baited aggregation of silky sharks Carcharhinus falciformis 🦑🌎🐟🦈 www.int-res.com/articles/mep...

Unveiling the species in shark-based pet snack products with an overview of e-commerce trends 🦑🌿🌎🐟🦈 www.sciencedirect.com/science/arti...

International trade regulations take a limited bite out of the shark fin trade Survey uncovers widespread illegal shark fin trade despite nearly a decade of international regulation.

International trade regulations take a limited bite out of the shark fin trade 🦑🌿🌎🐟🦈 www.science.org/doi/10.1126/...

FWC classifies Carolina hammerhead as a prohibited species 🦑🌿🌎🐟🦈 content.govdelivery.com/accounts/FLF...

Composition and conservation status of rays sold in Baja California Sur, Mexico 🦑🌿🐟🦈 conbio.onlinelibrary.wiley.com/doi/10.1111/...

Early gigantic lamniform marks the onset of mega-body size in modern shark evolution - Communications Biology The earliest appearance of mega-body size in sharks is pushed back by 15 million years with the discovery of new fossils from Northern Australia. Using a comprehensive dataset of living sharks to esti...

Early gigantic lamniform marks the onset of mega-body size in modern shark evolution 🦑🧪🐟🦈 www.nature.com/articles/s42...

First insights into the fine-scale vertical movements of a Carolina hammerhead, Sphyrna gilberti, and a hybrid between Carolina and scalloped hammerhead 🦑🌿🐟🦈 www.frontiersin.org/journals/mar...

Shark and ray meat sold for human consumption contains toxic metal concentrations above safe limits with concentrations varying by species and habitat Due to the high trophic positions sharks and rays occupy as apex predators, they are known to biomagnify toxic metals. This is problematic because sha…

Shark and ray meat sold for human consumption contains toxic metal concentrations above safe limits with concentrations varying by species and habitat 🦑🌿🐟🦈 www.sciencedirect.com/science/arti...

Key elements for developing sustainable whale shark-human interactions in coastal aggregation areas Whale shark (Rhincodon typus) populations have significantly declined more than 50 % in the last 75 years mainly due to anthropogenic stressors. While…

Key elements for developing sustainable whale shark-human interactions in coastal aggregation areas 🦑🌿🐟🦈 www.sciencedirect.com/science/arti...

Alzheimer’s disease signatures in the brain transcriptome of Estuarine Dolphins - Communications Biology Transcriptomic analysis of brain samples collected from dolphins found beached in the Indian River Lagoon during algal bloom seasons shows Alzheimer’s disease related molecular signatures.

Alzheimer’s disease signatures in the brain transcriptome of Estuarine Dolphins 🐬🦑🌿🧪🐟 www.nature.com/articles/s42...

A toxin from algae is causing signs similar to Alzheimer's in Florida’s Indian River Lagoon dolphins 🦑🧪🌿🐟🐬 www.floridatoday.com/story/news/l...

🚨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...