Scientific Papers

Element composition of shark vertebrae shows promise as a natural tag

Element composition of shark vertebrae shows promise as a natural tag

Element composition of shark vertebrae shows promise as a natural tag J. C. A. Pistevos, P. Reis-Santos, C. Izzo, B. M. Gillanders ABSTRACT: Reconstructing movements and environmental histories of sharks may be possible by using the element composition of vertebrae, but unlocking such possibilities requires an understanding of the effects of extrinsic and intrinsic factors

Mesoscale eddies release pelagic sharks from thermal constraints

Mesoscale eddies release pelagic sharks from thermal constraints

Mesoscale eddies release pelagic sharks from thermal constraints to foraging in the ocean twilight zone Camrin D. Braun, Peter Gaube, Tane H. Sinclair-Taylor, Gregory B. Skomal, and Simon R. Thorrold ABSTRACT: Mesoscale eddies are critical components of the ocean’s “internal weather” system. Mixing and stirring by eddies exerts significant control on biogeochemical fluxes in the

Reproductive biology, multiple paternity and polyandry of the bull shark

Reproductive biology, multiple paternity and polyandry of the bull shark

Reproductive biology, multiple paternity and polyandry of the bull shark Carcharhinus leucas Agathe Pirog, Hélène Magalon, Thomas Poirout, Sébastien Jaquemet ABSTRACT: To improve understanding of bull shark Carcharhinus leucas reproductive biology, we analysed reproductive traits from 118 bull sharks caught along Reunion Island coasts (Western Indian Ocean), including 16 gravid females. Specific microsatellite loci were

Bright Green Biofluorescence in Sharks Derives from Bromo-Kynurenine Metabolism

Bright Green Biofluorescence in Sharks Derives from Bromo-Kynurenine Metabolism

Bright Green Biofluorescence in Sharks Derives from Bromo-Kynurenine Metabolism Hyun Bong Park, Yick Chong Lam, Jean P.Gaffney, James C.Weaver, Sara Rose Krivoshik, Randy Hamchand, Vincent Pieribone, David F. Gruber, Jason M. Crawford ABSTRACT: Although in recent years there has been an increased awareness of the widespread nature of biofluorescence in the marine environment, the diversity

Global diet analysis of 23 species of chondrichthyes

Global diet analysis of 23 species of chondrichthyes

Feeding together: a global diet analysis of twenty-three species of chondrichthyes on a feeding ground area Mauro Belleggia, Cristian Battagliotti, Federico Cortés, Jorge Horacio Colonello ABSTRACT: A global analysis of the diet of chondrichthyes (23 species) was conducted during one bottom-trawl research cruise in the region where the highest catches of skates occurred off southwestern

Environmental characteristics associated with the presence of the Spinetail devil ray in the eastern tropical Pacific

Environmental characteristics associated with the presence of the Spinetail devil ray in the eastern tropical Pacific

Environmental characteristics associated with the presence of the Spinetail devil ray (Mobula mobular) in the eastern tropical Pacific Nerea Lezama-Ochoa, Martin A. Hall, Maria Grazia Pennino, Joshua D. Stewart, Jon López, Hilario Murua ABSTRACT: In the eastern Pacific Ocean, the tropical tuna purse-seine fishery incidentally captures high numbers of five mobulid bycatch species; all of

Remote reefs and seamounts are the last refuges for marine predators

Remote reefs and seamounts are the last refuges for marine predators

Remote reefs and seamounts are the last refuges for marine predators across the Indo-Pacific Tom B. Letessier, David Mouillot, Phil J. Bouchet, Laurent Vigliola, Marjorie C. Fernandes, Chris Thompson, Germain Boussarie, Jemma Turner, Jean-Baptiste Juhel, Eva Maire, M. Julian Caley, Heather J. Koldewey, Alan Friedlander, Enric Sala, Jessica J. Meeuwig ABSTRACT: Since the 1950s, industrial

The Energetics of Shark and Ray Megafauna

The Energetics of Shark and Ray Megafauna

Powering Ocean Giants: The Energetics of Shark and Ray Megafauna Christopher L. Lawson, Lewis G. Halsey, Graeme C. Hays, Christine L. Dudgeon, Nicholas L. Payne, Michael B. Bennett, Craig R. White, Anthony J. Richardson ABSTRACT: Shark and ray megafauna have crucial roles as top predators in many marine ecosystems, but are currently among the most

Acoustic accelerometry reveals diel activity patterns in premigratory Port Jackson sharks

Acoustic accelerometry reveals diel activity patterns in premigratory Port Jackson sharks

Acoustic accelerometry reveals diel activity patterns in premigratory Port Jackson sharks Julianna Kadar, Monique Ladds, Johann Mourier, Joanna Day, Culum Brown ABSTRACT: Distinguishing the factors that influence activity within a species advances understanding of their behavior and ecology. Continuous observation in the marine environment is not feasible but biotelemetry devices provide an opportunity for detailed

Global spatial risk assessment of sharks

Global spatial risk assessment of sharks

Global spatial risk assessment of sharks under the footprint of fisheries Nuno Queiroz, Nicolas E. Humphries, David W. Sims, et al. ABSTRACT: Effective ocean management and conservation of highly migratory species depends on resolving overlap between animal movements and distributions and fishing effort. Yet, this information is lacking at a global scale. Here we show,

Seasonal trends in whale shark sightings in an established tourism site

Seasonal trends in whale shark sightings in an established tourism site

Seasonal trends in whale shark Rhincodon typus sightings in an established tourism site in the Gulf of California, Mexico D. A. Whitehead, D. Petatán‐Ramírez, D. Olivier, R. González Armas, F. Pancaldi, F. Galván‐Magaña ABSTRACT: The number of individual whale shark Rhincodon typus sightings registered October 2015–March 2018 in Bahia de La Paz, Mexico, ranged from

Shark and ray entanglement in anthropogenic marine debris

Shark and ray entanglement in anthropogenic marine debris

Global review of shark and ray entanglement in anthropogenic marine debris Kristian J. Parton, Tamara S. Galloway, Brendan J. Godley ABSTRACT: Numerous marine taxa become entangled in anthropogenic marine debris, including cartilaginous fishes (class: Chondrichthyes, e.g. elasmobranchs , holocephalans ). Here we review research that has been conducted on the susceptibility of

Updated taxonomic list and conservation status of chondrichthyans from Venezuela

Updated taxonomic list and conservation status of chondrichthyans from Venezuela

Updated taxonomic list and conservation status of chondrichthyans from the exclusive economic zone of Venezuela, with first generic and specific records Nicolás R. Ehemann, Lorem D. V. González‐González, Alejandro Tagliafico, Simon Weigmann ABSTRACT: Using the last taxonomic review of chondrichthyans of the world, we selected the species distributed in the north‐western Atlantic Ocean (NWA) and

Planonasus indicus sp. n., a new species of pygmy false catshark

Planonasus indicus sp. n., a new species of pygmy false catshark

Planonasus indicus sp. n., a new species of pygmy false catshark (Chondrichthyes: Carcharhiniformes: Pseudotriakidae), with a revised diagnosis of the genus and key to the family David A. Ebert, K. V. Akhilesh, Simon Weigmann ABSTRACT: A new species of the genus Planonasus is described from off southwestern India and Sri Lanka in the northern Indian

Bite performance and feeding behaviour of the sand tiger shark

Bite performance and feeding behaviour of the sand tiger shark

Bite performance and feeding behaviour of the sand tiger shark Carcharias taurus Joshua K. Moyer, Stephanie F. Shannon, Duncan J. Irschick ABSTRACT: This study examines the feeding behaviour and kinematics of three sub‐adult sand tiger sharks Carcharias taurus on display at Mystic Aquarium (Mystic, Connecticut, USA). Using high‐speed video data from 52 bites, we identify