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Tooth morphology elucidates shark evolution across the end-Cretaceous mass extinction
Tooth morphology elucidates shark evolution across the end-Cretaceous mass extinction Mohamad Bazzi, Nicolás E. Campione, Per E. Ahlberg, Henning Blom, Benjamin P. Kear ABSTRACT: Sharks (Selachimorpha) are iconic marine predators that have survived multiple mass extinctions over geologic time. Their prolific fossil record is represented mainly by isolated shed teeth, which provide the basis for
Stable Isotope Analysis of Juvenile White Sharks Inside a Nursery Area
Stable Isotope Analysis of Juvenile White Sharks Inside a Nursery Area Reveals Foraging in Demersal-Inshore Habitats and Trophic Overlap With Sympatric Sharks Emiliano García-Rodríguez, Sharon Z. Herzka, Oscar Sosa-Nishizaki, Christopher G. Lowe, John B. O’Sullivan ABSTRACT: Knowledge about top predators’ trophic ecology is crucial for defining their role in ecosystems, understanding habitat preferences, characterizing life
Genomic assessment of global population structure in the tiger shark
Genomic assessment of global population structure in a highly migratory and habitat versatile apex predator, the tiger shark (Galeocerdo cuvier) Andrea M Bernard, Kimberly A Finnegan, Paulina Pavinski Bitar, Michael J Stanhope, Mahmood S Shivji ABSTRACT: Understanding the population dynamics of highly mobile, widely distributed, oceanic sharks, many of which are overexploited, is necessary to
UK Government to introduce world-leading ban on shark fin trade
Published on 21 Aug, 2021 at 11:18 in Conservation & Fishery, Front Page, Shark Trade | Viewed times | No Comments
Press Release UK Department for Environment, Food & Rural Affairsand The Rt Hon Lord Goldsmith 15 August 2021 — — — — — — — The UK will ban the import and export of detached shark fins and products containing them. Import and export of detached shark fins banned to promote shark conservation World-leading trade
Conservation Status of Shark Landed in Pangandaran Regency
Conservation Status of Shark Landed in Local Fish Market in Pangandaran Regency, Indonesia Rega Permana, Nursaidah, Ihda Abdul Hadi, Idham Rinaldi ABSTRACT: Pangandaran has a great fishery potential. Therefore, fishing communities make fisheries a source of economy, especially in the fishing sector, namely by buying and selling the catch. Fish buying and selling activities are
Morphological, cytochemical and ultrastructural aspects of blood cells in freshwater stingray species in the middle Rio Negro basin of Amazonian Brazil
Morphological, cytochemical and ultrastructural aspects of blood cells in freshwater stingray species in the middle Rio Negro basin of Amazonian Brazil Adriano Teixeira de Oliveira, Jefferson Raphael Gonzaga de Lemos, Marcio Quara de Carvalho Santos, Jackson Pantoja-Lima, Paulo Henrique Rocha Aride, Maria Lúcia Góes de Araújo, Marcos Tavares-Dias & Jaydione Luiz Marcon ABSTRACT: In the
Sexual conflicts in sand tiger sharks in an artificial environment
Sexual conflicts in sand tiger sharks Carcharias taurus (Rafinesque, 1810) in an artificial environment Claus, E., Henningsen, A., Wetherbee, B., & Shivji, M. ABSTRACT: Understanding reproductive behaviours and the environmental conditions that facilitate reproduction is important for successful reproduction in managed care. Complex reproductive behaviours have been observed in both aquarium and free-ranging elasmobranchs. Sexual
Movements, Habitat Use, and Diving Behavior of Shortfin Mako in the Atlantic Ocean
Movements, Habitat Use, and Diving Behavior of Shortfin Mako in the Atlantic Ocean Catarina C. Santos, Andrés Domingo, John Carlson, Lisa J. Natanson, Paulo Travassos, David Macías, Enric Cortés, Philip Miller, Fábio Hazin, Federico Mas, Josetxu Ortiz de Urbina, Pedro G. Lino, Rui Coelho ABSTRACT: The shortfin mako is one of the most important shark
Physiological markers suggest energetic and nutritional adjustments in male sharks linked to reproduction
Physiological markers suggest energetic and nutritional adjustments in male sharks linked to reproduction Bianca S. Rangel, Neil Hammerschlag, James A. Sulikowski, Renata Guimarães Moreira ABSTRACT: Energetic condition is one of the most important factors that influence fitness and reproductive performance in vertebrates. Yet, we lack evidence on how energetic states change in response to reproduction
Results of the 2021 Point Lookout Shark Tournament
Published on 5 Aug, 2021 at 14:44 in Sport fishing | Viewed times | No Comments
8th Annual Pt. Lookout Shark Tournament Location: Point Lookout, New York, USA.Date: 13. June 2021 WINNERS 1st Place:Boat: Lady MaureenSpecies: Thresher shark (Alopias vulpinus)Weight: 456 lbs 2nd Place:Boat: Sea Moose IISpecies: Thresher shark (Alopias vulpinus)Weight: 295 lbs 3rd Place:Boat: Cannonball IISpecies: Thresher shark (Alopias vulpinus)Weight: 278 lbs Winning Mako: Boat: Hooking OnSpecies: Shortfin mako shark
Basking shark sub-surface behaviour
Basking shark sub-surface behaviour revealed by animal-towed cameras Jessica L. Rudd, Tiago Bartolomeu, Haley R. Dolton, Owen M. Exeter, Christopher Kerry, Lucy A. Hawkes, Suzanne M. Henderson, Marcus Shirley, Matthew J. Witt ABSTRACT: While biologging tags have answered a wealth of ecological questions, the drivers and consequences of movement and activity often remain difficult to
The whale shark genome reveals patterns of vertebrate gene family evolution
The whale shark genome reveals patterns of vertebrate gene family evolution Milton Tan, Anthony K. Redmond, Helen Dooley, Ryo Nozu, Keiichi Sato, Shigehiro Kuraku, Sergey Koren, Adam M. Phillippy, Alistair D.M. Dove, Timothy D. Read ABSTRACT: Chondrichthyes (cartilaginous fishes) are fundamental for understanding vertebrate evolution, yet their genomes are understudied. We report long-read sequencing of
Checklist of Chondrichthyans in Cyprus
Integrating Literature, Biodiversity Databases, and Citizen-Science to Reconstruct the Checklist of Chondrichthyans in Cyprus (Eastern Mediterranean Sea) Ioannis Giovos, Fabrizio Serena, Dimitra Katsada, Athanasios Anastasiadis, Adi Barash, Charis Charilaou, Jason M. Hall-Spencer, Fabio Crocetta, Alexander Kaminas, Demetris Kletou, Mary Maximiadi, Vasileios Minasidis, Dimitrios K. Moutopoulos, Roxani Naasan Aga-Spyridopoulou, Ioannis Thasitis, Periklis Kleitou ABSTRACT: Chondrichthyans are
The diet of porbeagle shark Lamna nasus
Eating catch of the day: The diet of porbeagle shark Lamna nasus (Bonnaterre 1788) based on stomach content analysis, and the interaction with trawl fisheries in the southwestern Atlantic (52°S–56°S) Belleggia Mauro, Colonello Jorge, Cortés Federico, Figueroa Daniel ABSTRACT: The present work examined the diet of the porbeagle shark Lamna nasus in the Southwest Atlantic
Complex Human-Shark Conflicts Confound Conservation Action
Complex Human-Shark Conflicts Confound Conservation Action Colin A. Simpfendorfer, Michelle R. Heupel, Dave Kendal ABSTRACT: Human-wildlife conflicts are a growing phenomenon globally as human populations expand and wildlife interactions become more commonplace. While these conflicts have been well-defined in terrestrial systems, marine forms are less well-understood. As concerns grow for the future of many shark