Results 91 to 100 of about 10,818 (235)

Decline or stability of obligate freshwater elasmobranchs following high fishing pressure

, 2017
Despite elasmobranchs are a predominantly marine taxon, several species of sharks and rays are regularly found in fresh water. Although there is ample evidence of declining elasmobranch populations around the world, this evidence comes exclusively from ...
L. Lucifora, L. Balboni, P. Scarabotti, F. Alonso, D. Sabadin, A. Solari, F. Vargas, S. A. Barbini, E. Mabragaña, J. Astarloa   +9 more
semanticscholar   +1 more source

Distribution and Characterization of Threatened Common Eagle Ray Aggregations in the Central–Western Mediterranean Sea: Opportunities for Regional Conservation Actions

Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 8, August 2026.
ABSTRACT Many sharks and rays aggregate in critical habitats to migrate, rest, feed, mate or give birth. These predictable events, often involving dozens to thousands of individuals, represent important and vulnerable phases in their life cycles. However, fishing activities and unregulated tourism can threaten these aggregations, disrupting natural ...
Desirée Grancagnolo, Giorgio Aglieri, Carlo Cattano, Chiara Gambardella, Gabriele Turco, Marco Milazzo   +5 more
wiley   +1 more source

Is Blood Thicker Than Water? The Influence of Kin Within a Bull Shark Social Network

Ecology and Evolution, Volume 16, Issue 8, August 2026.
This study investigates how kinship (“kinfluence”) shapes social structure in an aggregation of adult bull sharks in Fiji by integrating genomic relatedness, pedigree reconstruction, and detailed behavioral data. It reveals that while genetic relatedness has a small but significant influence on social behavior, especially among males, kin‐category ...
Natasha D. Marosi, Darren P. Croft, David M. P. Jacoby, Samuel Ellis, Andrew M. Griffiths   +4 more
wiley   +1 more source

The Complete Mitochondrial Genome and Phylogenetic Position of the Pacific Spiny Dogfish Squalus suckleyi (Squaliformes: Squalidae)

Ecology and Evolution, Volume 16, Issue 8, August 2026.
The Pacific spiny dogfish (Squalus suckleyi) is a North Pacific shark of conservation consern that until now lacked a complete mitochondrial genome. We report its first mitogenome (16,738 bp; 37 genes), assembled from PacBio HiFi reads and recover it as sister to S.
Laure Inçaby, Sabrina Haney, Michael Phelps, Catherine S. Jones, Marcela Uliano‐Silva, Galice Hoarau, Leslie R. Noble   +6 more
wiley   +1 more source

Evidence of a Potential Nursery Area for the Great Hammerhead Shark, Sphyrna mokarran, in the Largest Coral Reef System of the Southwestern Atlantic

Ecology and Evolution, Volume 16, Issue 8, August 2026.
We present evidence suggesting that the Abrolhos Bank functions as key habitat for early life stages of Sphyrna mokarran. Kernel density estimation revealed spatially structured aggregations, with neonates and young‐of‐the‐year concentrated in shallow reef‐associated areas. Temporal variation in catch per unit effort (CPUE) indicated recruitment pulses
Jones Santander‐Neto, Rodrigo Barreto, Guilherme dos Santos Lírio, Michael Heithaus, Otto Bismarck Fazzano Gadig, Maurício Hostim‐Silva   +5 more
wiley   +1 more source

Keratan Sulfate: An Electroconductive Glycosaminoglycan at the Interface of Sensory Perception and Neural Signaling

Journal of Neuroscience Research, Volume 104, Issue 8, August 2026.
Laboratory studies show KS has electroconductive properties with the ability to trap and transport protons in neurotransductive processes (Grotthuss proton shuttling). This maintains electrochemical gradients and fluxes at the neuronal cell surface in neural activation. Such processes are central to neuronal cell signaling and communication.
James Melrose
wiley   +1 more source

Assessing differences among elasmobranch nurseries to aid conservation based on a genomics framework

Conservation Biology, Volume 40, Issue 4, August 2026.
Abstract Elasmobranch nurseries often differ in environmental conditions, demographics, and use patterns. These differences affect the distribution of genetic variation among nurseries. However, conservation and management strategies often fail to account for such differences because they are difficult to characterize.
Dominic G. Swift, Amanda M. Barker, William B. Driggers III, Bryan S. Frazier, Douglas H. Adams, James J. Gelsleichter, Dana M. Bethea, Bethany M. Deacy, David S. Portnoy   +8 more
wiley   +1 more source

Use of Pristis spp. (Elasmobranchii: Pristidae) by Hunter-Gatherers on the Coast of São Paulo, Brazil

Neotropical Ichthyology
Artifacts made from rays (rostral teeth and spine) are very common in shell mounds on the coast of São Paulo, Brazil. The presence of the genus Pristis among the studied species of elasmobranch fishes in this shell mounds reinforces the hypothesis these ...
Manoel M. B. Gonzalez
doaj   +1 more source

Fewer devil rays in the sea: Evidence of declining mobulid populations off India's coast

Conservation Science and Practice, Volume 8, Issue 8, August 2026.
Manta and devil rays are declining globally due to targeted and incidental capture, but species‐specific assessments are limited by unmonitored fisheries. Using morphometric, demographic, and fishery metrics, we show for the first time in India long‐term (2013–2023) declines in Mobula mobular, Mobula tarapacana, Mobula birostris, and Mobula thurstoni ...
Mayuri Chopra, Gwilym Rowlands, Guy M. W. Stevens, Daniel Fernando, Mohanraj T., Betty J. L. Laglbauer, Divya Karnad, Katrina J. Davis   +7 more
wiley   +1 more source

Post‐Release Survival of the Pelagic Stingray (Pteroplatytrygon violacea, Bonaparte, 1832) in French Longline Fisheries in the Northwestern Mediterranean Sea

Fisheries Management and Ecology, Volume 33, Issue 4, Page 719-732, August 2026.
ABSTRACT Bycatch remains a critical challenge in global fisheries, even when using selective gears such as longlines. In the French longline fishery targeting Atlantic bluefin tuna (Thunnus thynnus) in the Gulf of Lion, the common pelagic stingray (Pteroplatytrygon violacea) is the primary bycatch species.
Antoine Landreau, Vincent Kerzérho, Olivier Derridj, Bertrand Wendling, Nolwenn Cosnard, Tristan Rouyer   +5 more
wiley   +1 more source