Results 41 to 50 of about 21,186 (271)

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

Sexual dimorphisms in the dermal denticles of thelesser-spotted catshark, Scyliorhinus canicula (Linnaeus, 1758) [PDF]

, 2013
The dermal layers of several elasmobranch species have been shown to be sexually dimorphic. Generally, when this occurs the females have thicker dermal layers compared to those of males. This sexual dimorphism has been suggested to occur as a response to
Adrian C Love, Colin P Waring, Lucy Babey, Neil Crooks, William J Haddon   +4 more
core   +2 more sources

Growth and reproduction in captivity unveils remarkable life-history plasticity in the smallnose fanskate, Sympterygia bonapartii (Chondrichthyes: Rajiformes) [PDF]

, 2018
Analizamos el crecimiento y la reproducción de ejemplares de raya marmorada, Sympterygia bonapartii nacidas en cautiverio. Se obtuvieron ovicápsulas a partir de la oviposición de dos hembras capturadas en la naturaleza y mantenidas en el Acuario Temaikèn.
Abraham, Carolina, Argemi, Federico, Jañez, Julieta, Lucifora, Luis Omar, Meijide, Fernando Javier   +4 more
core   +3 more sources

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

The early elasmobranch Phoebodus: phylogenetic relationships, ecomorphology and a new time-scale for shark evolution

Proceedings of the Royal Society B, 2019
Anatomical knowledge of early chondrichthyans and estimates of their phylogeny are improving, but many taxa are still known only from microremains. The nearly cosmopolitan and regionally abundant Devonian genus Phoebodus has long been known solely from ...
Linda Frey, M. Coates, M. Ginter, V. Hairapetian, Martin Rücklin, I. Jerjen, C. Klug   +6 more
semanticscholar   +1 more source

Foliculogénesis Ovárica en la Raya Marmorada, Sympterygia bonapartii (Müller & Henle, 1841) (Chondrichthyes, Rajidae) [PDF]

, 2011
Los Condrictios se han convertido en un recurso económico importante en las últimas décadas, siendo Argentina uno de los países que más explota tiburones y rayas, incluso a niveles que exceden los límites de varias especies.
Díaz Andrade, María Constanza, Estecondo, Silvia, Galíndez, Elena Juana, Lopez Cazorla, Andrea Cecilia   +3 more
core   +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

A new species of Dermopristis Kearn, Whittington & Evans-Gowing, 2010 (Monogenea: Microbothriidae), with observations on associations between the gut diverticula and reproductive system and on the presence of denticles in the nasal fossae of the host Glaucostegus typus (Bennett) (Elasmobranchii: Rhinobatidae) [PDF]

, 2011
Dermopristis cairae n. sp. (Microbothriidae) is described from the skin and possibly from the nasal fossae of the giant shovelnosed ray Glaucostegus typus (Bennett). The new species is distinguished from D.
EM Perkins, EW Price, GC Kearn, GC Kearn, GC Kearn, GC Kearn, GC Kearn, Graham C. Kearn, Ian D. Whittington, ID Whittington, M Beverley-Burton, NG Sproston, RL Abel, T Tappenden, V Glennon   +14 more
core   +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

DNA-based identification reveals illegal trade of threatened shark species in a global elasmobranch conservation hotspot

Scientific Reports, 2018
Here, we report trading of endangered shark species in a world hotspot for elasmobranch conservation in Brazil. Data on shark fisheries are scarce in Brazil, although the northern and northeastern regions have the highest indices of shark bycatch ...
L. M. Feitosa, A. P. B. Martins, Tommaso Giarrizzo, W. Macedo, Iann Leonardo Pinheiro Monteiro, Romário Gemaque, J. Nunes, Fernanda Gomes, H. Schneider, I. Sampaio, R. Souza, J. Sales, L. F. Rodrigues-Filho, Lígia Tchaicka, L. F. Carvalho-Costa   +14 more
semanticscholar   +1 more source