Results 21 to 30 of about 5,644 (225)

A new elasmobranch Karksiodus mirus gen. et sp. nov. from the Burtnieki Regional Stage, Middle Devonian of Estonia [PDF]

Estonian Journal of Earth Sciences, 2011
Teeth of a new elasmobranch Karksiodus mirus gen. et sp. nov. were discovered on two levels in the sandstones of the Karksi outcrop (South Estonia), corresponding to the Härma Beds, lower part of the Burtnieki Regional Stage (Givetian, Middle Devonian ...
Alexander Ivanov, Tiiu Märss, Anne Kleesment   +2 more
doaj   +1 more source

Development of Sperm Cryopreservation Protocols for Sharks and Rays: New Tools for Elasmobranch Conservation

Frontiers in Marine Science, 2021
Elasmobranchs are one of the most endangered vertebrate groups on the planet, but despite this situation the use of reproductive techniques in elasmobranch conservation strategies has been scarce. Among these techniques, sperm preservation is a potential
Pablo García-Salinas, Pablo García-Salinas, Victor Gallego, Juan F. Asturiano   +3 more
doaj   +1 more source

Influence of ecological traits on spatio-temporal dynamics of an elasmobranch community in a heavily exploited basin

Scientific Reports, 2023
Elasmobranchs, which include sharks and batoids, play critical roles in maintaining the integrity and stability of marine food webs. However, these cartilaginous fish are among the most threatened vertebrate lineages due to their widespread depletion ...
Federico Maioli, Benjamin Weigel, Elettra Chiarabelli, Chiara Manfredi, Alessandra Anibaldi, Igor Isailović, Nedo Vrgoč, Michele Casini   +7 more
doaj   +1 more source

Optimal soak times for Baited Remote Underwater Video Station surveys of reef-associated elasmobranchs.

PLoS ONE, 2020
Effective sampling of marine communities is essential to provide robust estimates of species richness and abundance. Baited Remote Underwater Video Stations (BRUVS) are a useful tool in assessment of fish assemblages, but research on the optimal sampling
Leanne M Currey-Randall, Mike Cappo, Colin A Simpfendorfer, Naomi F Farabaugh, Michelle R Heupel   +4 more
doaj   +1 more source

Spatial heterogeneity in fishing creates de facto refugia for endangered Celtic Sea elasmobranchs. [PDF]

PLoS ONE, 2012
The life history characteristics of some elasmobranchs make them particularly vulnerable to fishing mortality; about a third of all species are listed by the IUCN as Threatened or Near Threatened.
Samuel Shephard, Hans Gerritsen, Michel J Kaiser, David G Reid   +3 more
doaj   +1 more source

Molecular Identification of Shark Meat From Local Markets in Southern Brazil Based on DNA Barcoding: Evidence for Mislabeling and Trade of Endangered Species

Frontiers in Genetics, 2018
Elasmobranchs, the group of cartilaginous fishes that include sharks and rays, are especially vulnerable to overfishing due to low fecundity and late sexual maturation.
Fernanda Almerón-Souza, Christian Sperb, Carolina L. Castilho, Pedro I. C. C. Figueiredo, Leonardo T. Gonçalves, Rodrigo Machado, Larissa R. Oliveira, Victor H. Valiati, Nelson J. R. Fagundes   +8 more
doaj   +1 more source

Addressing data-deficiency of threatened sharks and rays in a highly dynamic coastal ecosystem using environmental DNA

Ecological Indicators, 2023
Marine biodiversity loss is accelerating, leading to the elevated extinction risks of many species, including sharks and rays. To mitigate these losses, information on their distribution and community composition is needed.
Guido Leurs, Yvonne I. Verkuil, Nadia Hijner, Franziska Saalmann, Lilísio Dos Santos, Aissa Regalla, Samuel Ledo Pontes, Lei Yang, Gavin J.P. Naylor, Han Olff, Laura L. Govers   +10 more
doaj   +1 more source

Demographic Characteristics of Elasmobranch Fishes in the Khor Faridah Region (Abu Dhabi) Using a Stereo-BRUVS Approach

Diversity
The elasmobranch fauna was studied in the Khor Faridah region of Abu Dhabi, which is a mangrove-dominated inshore habitat historically reported to host a diversity of elasmobranch species.
Stephan Bruns, Shamsa Al Hameli, Aaron C. Henderson   +2 more
doaj   +1 more source

Elasmobranch bycatch distributions and mortality: Insights from the European tropical tuna purse-seine fishery

Global Ecology and Conservation, 2020
Despite bycatch of elasmobranch (sharks and rays) being a major concern in most fisheries worldwide, there is a lack of knowledge on their spatio-temporal species distribution, biology (life stage and sex-ratios), as well as their at-haulback mortality ...
Lyndsay Clavareau, Philippe S. Sabarros, Lauriane Escalle, Pascal Bach, Francisco J. Abascal, Jon Lopez, Hilario Murua, Pedro J. Pascual Alayon, Maria Lourdes Ramos, Jon Ruiz, Bastien Mérigot   +10 more
doaj   +1 more source

Functional models from limited data: A parametric and multimodal approach to anatomy and 3D kinematics of feeding in basking sharks (Cetorhinus maximus)

The Anatomical Record, EarlyView.
Abstract Basking sharks, Cetorhinus maximus (Gunnerus, Brugden [Squalus maximus], Det Kongelige Norske Videnskabers Selskabs Skrifter, 1765, vol. 3, pp. 33–49), feed by gaping their mouths and gill slits, greatly reorienting their cranial skeletons to filter food from water.
Tairan Li, Mike Schindler, Martha Paskin, Venkata A. Surapaneni, Elliott Scott, Sabine Hauert, Nicholas Payne, David E. Cade, Jeremy A. Goldbogen, Frederik H. Mollen, Daniel Baum, Sean Hanna, Mason N. Dean   +12 more
wiley   +1 more source