Results 71 to 80 of about 2,701 (193)

Tooth mineralization and histology patterns in extinct and extant snaggletooth sharks, Hemipristis (Carcharhiniformes, Hemigaleidae)-Evolutionary significance or ecological adaptation? [PDF]

PLoS ONE, 2018
Shark jaws exhibit teeth that are arranged into distinct series and files and display great diversities in shapes and structures, which not only is related to their function (grasping, cutting, crushing) during feeding, but also bear a strong ...
Patrick L Jambura, Cathrin Pfaff, Charlie J Underwood, David J Ward, Jürgen Kriwet   +4 more
doaj   +1 more source

Retention Bans Are Beneficial but Insufficient to Stop Shark Overfishing

Fish and Fisheries, Volume 26, Issue 3, Page 473-487, May 2025.
ABSTRACT Sharks are among the most threatened groups of exploited fishes, comprising common bycatch across many fisheries. Management efforts intended to safeguard threatened species have increasingly focused on retention bans to reduce bycatch mortality. However, the population effects of such measures remain unevaluated across species.
Leonardo Manir Feitosa, Alicia M. Caughman, Nidhi G. D'Costa, Sara Orofino, Echelle S. Burns, Laurenne Schiller, Boris Worm, Darcy Bradley   +7 more
wiley   +1 more source

Predicting time‐at‐depth weighted biodiversity patterns for sharks of the North Pacific

Ecography, Volume 2025, Issue 3, March 2025.
Depth is a fundamental and universal driver of ocean biogeography but it is unclear how the biodiversity patterns of larger, more mobile organisms change as a function of depth. Here, we developed a predictive biogeography model to explore how information of mobile species' depth preferences influence biodiversity patterns.
Zachary A. Siders, Lauren B. Trotta, William Patrone, Fabio P. Caltabellotta, Katherine B. Loesser, Benjamin Baiser   +5 more
wiley   +1 more source

Condrictios de la Argentina y Uruguay: lista de trabajo [PDF]

, 2007
Presentamos aquí una lista actualizada de los condrictios (tiburones, rayas, quimeras y pez elefante) que han sido citados de la Argentina y Uruguay, incluyendo las especies de agua dulce de la familia Potamotrygonidae.
Lucifora, Luis O., Menni, Roberto C.
core  

Design and Validation of an Open–Close Device for Integrated Environmental DNA Sampling Detects A Depth Gradient in Indian Ocean Deep‐Sea Fish Assemblages

Ecology and Evolution, Volume 15, Issue 2, February 2025.
The goal of this study was to leverage existing survey technology to design and test an eDNA sampler that captures an integrated eDNA sample over the length of a deep‐water transect. We provide a biological interpretation of the resulting data, demonstrating the usefulness of such technology to understand the ocean environments, using fish species as ...
Cindy Bessey, Andrew Martini, Alasdair Currie, Will Ponsonby, Aaron Tyndall, Ryan Crossing, Vinícius Werneck Salazar, Kathryn L. Dawkins, John J. Pogonoski, Glenn Moore, Nick Mortimer, John K. Keesing   +11 more
wiley   +1 more source

Biogeographic patterns in the cartilaginous fauna (Pisces: Elasmobranchii and Holocephali) in the southeast Pacific Ocean [PDF]

, 2014
The abundance and species richness of the cartilaginous fish community of the continental shelf and slope off central Chile is described, based on fishery-independent trawl tows made in 2006 and 2007. A total of 194,705 specimens comprising 20 species (9
Acuña, Acuña, Arancibia, Bascompte, Brattström, Bustamante, Camus, Carrasco, Clarke, Clarke, Compagno, Compagno, Compagno, Cubillos, Ebert, Ellis, Escribano, Ferretti, Ferretti, Graham, Henry, Kempton, Lamilla, Lamilla, Lucifora, Mann, Meléndez, Menares, Navia, Ojeda, Ojeda, Pakhomov, Pequeño, Pequeño, Pequeño, Pequeño, Priede, Rex, Rohde, Sellanes, Shepherd, Sielfeld, Solervicens, Spellerberg, Wetherbee, Wolff   +45 more
core   +2 more sources

Mitochondrial DNA patterns describe the evolutionary history of the bonnethead shark Sphyrna tiburo (Linneus 1758) complex in the western Atlantic Ocean

Journal of Fish Biology, Volume 106, Issue 2, Page 403-419, February 2025.
Abstract The apparent lack of physical barriers in the marine realm has created the conception that many groups have a constant gene flow. However, changes in ocean circulation patterns, glacial cycles, temperature, and salinity gradients are responsible for vicariant events in many fish species, including sharks.
Maried Ochoa‐Zavala, Adan Fernando Mar‐Silva, Rodolfo Pérez‐Rodríguez, Paola Palacios‐Barreto, Douglas H. Adams, María del Pilar Blanco‐Parra, Píndaro Díaz‐Jaimes   +6 more
wiley   +1 more source

Edad y crecimiento del tiburón gatuzo Mustelus schmitti (Carcharhiniformes, Triakidae) en aguas costeras de la provincia de Chubut, Patagonia, Argentina

Ecología Austral
El gatuzo, Mustelus schmitti (Carcharhiniformes, Triakidae) es un tiburón endémico del Océano Atlántico Sudoccidental y está catalogado como en peligro crítico por la UICN. La edad y el crecimiento de M.
Ximena Navoa, Nelson D. Bovcon, Matías Suárez, Alessandra Pasti, Kevin J. Jacobi, Marina Coller, Gustavo E. Chiaramonte   +6 more
doaj   +1 more source

The rise and fall of shark functional diversity over the last 66 million years

Global Ecology and Biogeography, Volume 33, Issue 9, September 2024.
Abstract Aim Modern sharks are a diverse and highly threatened group playing important roles in ecosystems. They have an abundant fossil record spanning at least 250 million years (Myr), consisting primarily of isolated teeth. Throughout their evolutionary history, sharks have faced multiple environmental changes and extinction events.
Jack A. Cooper, Catalina Pimiento
wiley   +1 more source

Report on the rare quagga cat shark landed [PDF]

, 2017
Quagga catshark, Halaelurus quagga (Alcock, 1899) one of the rarest sharks in the family Scyliorhinidae (Order Carcharhiniformes) was observed at Muttom landing centre, Tamil Nadu on June 5 2017.
Ambarish, Gop P, Kingsly, H Jose, Zacharia, P U   +2 more
core