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Confirmation of Luminescence Ability for the velvet dogfish
A Third Luminous Shark Family: Confirmation of Luminescence Ability for Zameus squamulosus (Squaliformes; Somniosidae) Laurent Duchatelet, Raphaël Marion, Jérôme Mallefet ABSTRACT: Since recently, shark’s bioluminescence has been recorded from two Squaliformes families, the Etmopteridae and Dalatiidae. Pictures of luminescence, light organ morphologies, and physiology of the luminous control have been described for species of the
Elucidating shark diets with DNA metabarcoding from cloacal swabs
Elucidating shark diets with DNA metabarcoding from cloacal swabs Maurits P. M. van Zinnicq Bergmann, Bautisse D. Postaire, Kirk Gastrich, Michael R. Heithaus, Lisa A. Hoopes, Kady Lyons, Yannis P. Papastamatiou, Eric V. C. Schneider, Bradley A. Strickland, Brendan S. Talwar, Demian D. Chapman, Judith Bakker ABSTACT: Animal dietary information provides the foundation for understanding
Movement Patterns and Habitat Use of Juvenile Porbeagles
Horizontal and Vertical Movement Patterns and Habitat Use of Juvenile Porbeagles (Lamna nasus) in the Western North Atlantic Gregory Skomal, Heather Marshall, Benjamin Galuardi, Lisa Natanson, Camrin D. Braun, Diego Bernal ABSTRACT: The porbeagle (Lamna nasus) is a large, highly migratory endothermic shark broadly distributed in the higher latitudes of the Atlantic, South Pacific, and
Reproductive aspects of seven threatened shark species
Reproductive aspects of seven threatened shark species captured by artisanal fisheries in the southern Caribbean Sea A. Tagliafico, M.S. Rangel, N.R. Ehemann, N.E. Rago, M.K. Broadhurst ABSTRACT: Venezuela is among the top four Latin American countries with the greatest elasmobranch biodiversity. The country is also characterised by extensive artisanal fisheries, but there is a paucity
Possible causes of a substantial decline in white shark sightings in South Africa
Possible causes of a substantial decline in sightings in South Africa of an ecologically important apex predator, the white shark Robin Fisher ABSTRACT: A decline in sightings of a top predator, the white shark (Carcharadon carcharias), in South Africa was quantified in order to identify possible causes for this decline. White shark sightings data across
First complete description of the dark-mouth skate from Antarctic waters
First complete description of the dark-mouth skate Raja arctowskii Dollo, 1904 from Antarctic waters, assigned to the genus Bathyraja (Elasmobranchii, Rajiformes, Arhynchobatidae) Matthias F. W. Stehmann, Simon Weigmann, Gavin J. P. Naylor ABSTRACT: The dark-mouth skate, Raja arctowskii Dollo, 1904 from Antarctic waters is an extraordinary case in skate taxonomy. For more than 100 years,
Morphometric description and biological notes on the kifetin shark
Morphometric description and biological notes on the rare kifetin shark Dalatias licha (Chondrichthyes: Dalatidae) from the Hellenic waters Vasiliki Kousteni ABSTRACT: Deep‐sea sharks are among the less studied and most endangered elasmobranchs existing in the Mediterranean Sea, and thus scientific research should be prioritized towards this vulnerable group of species. The aim of the present
Half a century of global decline in oceanic sharks and rays
Half a century of global decline in oceanic sharks and rays Nathan Pacoureau, Cassandra L. Rigby, Peter M. Kyne, Richard B. Sherley, Henning Winker, John K. Carlson, Sonja V. Fordham, Rodrigo Barreto, Daniel Fernando, Malcolm P. Francis, Rima W. Jabado, Katelyn B. Herman, Kwang-Ming Liu, Andrea D. Marshall, Riley A. Pollom, Evgeny V. Romanov, Colin
Seasonal Movement Patterns of Shortfin Mako Sharks in the Gulf of Mexico
New Insights Into the Seasonal Movement Patterns of Shortfin Mako Sharks in the Gulf of Mexico Kesley J. Gibson, Matthew K. Streich, Tara S. Topping, Gregory W. Stunz ABSTRACT: Highly mobile apex predators such as the shortfin mako shark (mako shark; Isurus oxyrinchus) serve an important role in the marine ecosystem, and despite their declining
Protective effects of shark compound peptides against acute inflammation
Protective effects of orally administered shark compound peptides from Chiloscyllium plagiosum against acute inflammation Tong-Xin Wang, Dong-Yan Shen, Qin Wang, Xin-Heng Xu, Xi Wang, Qing-Xi Chen, Jiang-Xing Zhuang, Yule-Yue Wang ABSTRACT: The anti-inflammatory effects of shark compound peptides (SCP) from Chiloscyllium plagiosum were investigated. Results showed that SCP enhanced the viability of RAW 264.7 macrophages
On the influence of biomimetic shark skin in dynamic flow separation
On the influence of biomimetic shark skin in dynamic flow separation Pengming Guo, Kai Zhang, Yuji Yasuda , Wenchao Yang, Josephine Galipon, David Emory Rival ABSTRACT: The effect of shark skin on the boundary-layer separation process under dynamic conditions (maneuvers) has been studied experimentally. We use a foil covered with biomimetic shark skin to explore
Population genetics reveals global and regional history of the tiger shark
Population genetics reveals global and regional history of the apex predator Galeocerdo cuvier (carcharhiniformes) with comments on mitigating shark attacks in north‐eastern brazil Flávia R.S. Andrade, André S. Afonso, Fábio H.V. Hazin, Fernando F. Mendonça, Rodrigo A. Torres ABSTRACT: The knowledge of the population structure of a given species is of great importance for its
Biology, fishing and conservation of the blue shark
Current knowledge on biology, fishing and conservation of the blue shark (Prionace glauca) Thaísy Emmanuelle Florentino da Silva, Rosangela Lessa, Francisco Marcante Santana ABSTRACT: The blue shark (Prionace glauca) is a large predator in marine ecosystems, figuring as the most common and abundant species in oceanic fisheries. For this reason, many studies on this species
The impact of injury on apparent survival of whale sharks in South Ari Atoll
The impact of injury on apparent survival of whale sharks (Rhincodon typus) in South Ari Atoll Marine Protected Area, Maldives Jessica Harvey-Carroll, Joshua D. Stewart, Daire Carroll, Basith Mohamed, Ibrahim Shameel, Irthisham H. Zareer, Gonzalo Araujo, Richard Rees ABSTRACT: The whale shark (Rhincodon typus) is an endangered species with a declining global population. The South
Development and characterization of thirteen novel microsatellite markers for use in Greenland sharks
Development and characterization of thirteen novel microsatellite markers for use in Greenland sharks (Somniosus microcephalus), with cross-amplification in Pacific sleeper sharks (Somniosus pacificus) Swintek, M.A., Walter, R.P. ABSTRACT: Objective The objectives of this work are to isolate, develop, and characterize polymorphic microsatellite markers for use in Greenland sharks (Somniosus microcephalus). Results Thirteen microsatellite loci were