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The presence of Bull shark in the fresh waters of Sumatra
Short Communication: The presence of Bull shark Carcharhinus leucas (Elasmobranchii: Carcharhinidae) in the fresh waters of Sumatra, Indonesia Hasan V, Widodo MS. ABSTRACT: A single subadult specimen of Bull shark Carcharhinus leucas was photographed and captured by local fisherman using casting net on June 2020 in the upper Indragiri River, Riau Province, Indonesia. Carcharhinus leucas
Social media: a valuable tool to inform shark conservation in Greece
Social media: a valuable tool to inform shark conservation in Greece Taklis C., Giovos I., Karamanlidis A. ABSTRACT: Sharks in the Mediterranean Sea are facing an elevated risk of extinction; several species are considered endangered and some have been reduced to such low population numbers that they are hard to detect through conventional monitoring methods.
Shark discards in selective and mixed-species pelagic longline fisheries
Shark discards in selective and mixed-species pelagic longline fisheries Gareth L. Jordaan, Jorge Santos, Johan C. Groeneveld ABSTRACT: The conservation status of several pelagic shark species is considered vulnerable with declining populations, yet data on shark fishing mortality remain limited for large ocean regions. Pelagic sharks are increasingly retained by mixed-species fisheries, or are discarded
Demographic and Exploitation Parameters of the Blue Shark in the Gulf of Guinea
Demographic and Exploitation Parameters of the Blue Shark, Prionace Glauca in the Gulf of Guinea (Togo-Benin-Nigeria) Calèbe Midinoudéwa, H.E.; Sohou, Z.; Tulashie, S.K.; Fiogbé, E.D. ABSTRACT: Prionace glauca, blue shark is a cosmopolitan species. Together with Carcharhinus falciformis, it co-dominated the landings of carcharhinidae sharks at the Artisanal Fishing Port of Cotonou. The objective of
Determining the Authenticity of Shark Meat Products by DNA Sequencing
Determining the Authenticity of Shark Meat Products by DNA Sequencing Patrizia Marchetti, Anna Mottola, Roberta Piredda, Giuseppina Ciccarese, Angela Di Pinto ABSTRACT: Given that the global shark meat market is poised to grow in future years, the aim of this study was to use DNA sequencing of the cytochrome c oxidase I (COI) and NADH
A morphologically abnormal and highly metal-contaminated Spotback Skate
First record of a morphologically abnormal and highly metal-contaminated Spotback Skate Atlantoraja castelnaui (Rajiformes: Arhynchobatidae) from southeastern Rio de Janeiro, Brazil Rachel Ann Hauser-Davis, Márcio L.V. Barbosa-Filho, Lucia Helena S. de S. Pereira, Catarina A. Lopes, Sérgio C. Moreira, Rafael C.C. Rocha, Tatiana D. Saint’Pierre, Paula Baldassin, Salvatore Siciliano ABSTRACT: This paper reports the first
Preliminary age and growth of the goblin shark
Preliminary age and growth of the deep-water goblin shark Mitsukurina owstoni (Jordan, 1898) Fabio P. Caltabellotta, Zachary A. Siders, Gregor M. Cailliet, Fabio S. Motta, Otto B. F. Gadig ABSTRACT: Owing to poorly mineralising structures, ageing deep-water elasmobranchs requires unconventional techniques. The aim of the present study was to develop an ageing method for the
Can drifting objects drive the movements of a vulnerable pelagic shark?
Can drifting objects drive the movements of a vulnerable pelagic shark? Lucas Bonnin, Christophe Lett, Laurent Dagorn, John David Filmalter, Fabien Forget, Philippe Verley, Manuela Capello ABSTRACT: Juvenile silky sharks (Carcharhinus falciformis) regularly associate with floating objects yet the reasons driving this behaviour remain uncertain. Understanding the proportion of time that silky sharks spend associated
Autonomous underwater videography and tracking of basking sharks
Autonomous underwater videography and tracking of basking sharks L.A. Hawkes, O. Exeter, S. M. Henderson, C. Kerry, A. Kukulya, J. Rudd, S. Whelan, N. Yoder, M. J. Witt ABSTRACT: Background Biologging studies have revealed a wealth of information about the spatio-temporal movements of a wide range of vertebrates large enough to carry electronic tracking tags.
Sharks and rays caught by a small‐scale fisheries in the western equatorial Atlantic
Sharks and rays caught by a small‐scale fisheries in the western equatorial Atlantic Jones Santander‐Neto, Vicente Vieira Faria ABSTRACT: N/A Journal of Applied Ichthyology, Early View, DOI: 10.1111/jai.14103 SOURCE
When prey becomes killer: does a double lethal attack on a blue shark reveal a precise defensive strategy in young swordfish?
When prey becomes killer: does a double lethal attack on a blue shark reveal a precise defensive strategy in young swordfish? Teresa Romeo, Pietro Battaglia, Domenico Macaluso, Giuseppe Tagliavia, Teresa Manuela Vicchio, Manuela Falautano, Fabrizio Serena, Franco Andaloro ABSTRACT: In this paper a rare case of a double swordfish mortal attack against an adult blue
Multiyear social stability and social information use in reef sharks with diel fission–fusion dynamics
Multiyear social stability and social information use in reef sharks with diel fission–fusion dynamics Yannis P. Papastamatiou, Thomas W. Bodey, Jennifer E. Caselle, Darcy Bradley, Robin Freeman, Alan M. Friedlander, David M. P. Jacoby ABSTRACT: Animals across vertebrate taxa form social communities and often exist as fission–fusion groups. Central place foragers (CPF) may form groups
Development and regeneration of the crushing dentition in skates
Development and regeneration of the crushing dentition in skates (Rajidae) Liam J. Rasch, Rory L. Cooper, Charlie Underwood, Wesley A. Dillard, Alexandre P. Thiery, Gareth J. Fraser ABSTRACT: Sharks and rays (elasmobranchs) have the remarkable capacity to continuously regenerate their teeth. The polyphyodont system is considered the ancestral condition of the gnathostome dentition. Despite this
The effects of bait provisioning in the blacktip reef shark
Human‐induced shifts in habitat use and behaviour of a marine predator: the effects of bait provisioning in the blacktip reef shark J. Mourier, J. Claudet, S. Planes ABSTRACT: While the negative effects of consumptive pressures on marine predators are well established, the effects of increasing non‐consumptive activities such as wildlife tourism are still understudied. As
Artisanal fisheries impact on the smalltail shark from Northern Brazil
From plentiful to critically endangered: Demographic evidence of the artisanal fisheries impact on the smalltail shark (Carcharhinus porosus) from Northern Brazil Francisco Marcante Santana, Leonardo Manir Feitosa, Rosângela Paula Lessa ABSTRACT: The smalltail shark, Carcharhinus porosus, was the most abundant elasmobranch species in fisheries off Brazil’s northern coast (BNC) in the 1980s, but its population