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Effects of food provisioning on the daily ration and dive site use of great hammerhead sharks
Effects of food provisioning on the daily ration and dive site use of great hammerhead sharks, Sphyrna mokarran Vital Heim, Félicie Dhellemmes, Matthew J. Smukall, Samuel H. Gruber, Tristan L. Guttridge ABSTRACT: Wildlife provisioning is popular, economically valuable and a rapidly growing part of marine tourism, with great potential to benefit conservation. However, it remains
New guides to bolster shark and ray research and species identification in Southeast Asia
Press Release Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) 27. April 2021 — — — — — — — The CITES Secretariat and the Secretariat of the Southeast Asian Fisheries Development Center (SEAFDEC) have jointly published two guides to facilitate the identification of shark and ray species common in
Media Statement on concerns around potential amendments to the shark ban in the Maldives
Published on 28 Apr, 2021 at 15:46 in Conservation & Fishery, Fishery Management | Viewed times | No Comments
Press Release Ministry of Fisheries, Marine Resources and Agriculture Male’, Republic of Maldives 20. April 2021 — — — — — — — — Following serious concerns regarding the status of shark stocks in Maldivian waters, as well as the Indian Ocean in general, the Maldives adopted the Precautionary Approach and imposed a ban on
Telomere Length in the Deep-Sea Shark, Etmopterus granulosus
An Exploratory Study of Telomere Length in the Deep-Sea Shark, Etmopterus granulosus Melissa C. Nehmens, Rebecca M. Varney, Alexis M. Janosik, David A. Ebert ABSTRACT: The history of elasmobranch ageing highlights the difficulty of age estimation in animals lacking ossified structures. Ageing techniques are numerous, yet all are limited by difficulties of validation and verification
Foraging depth depicts resource partitioning and contamination level in a pelagic shark assemblage
Foraging depth depicts resource partitioning and contamination level in a pelagic shark assemblage: Insights from mercury stable isotopes Lucien Besnard, Gaël Le Croizier, Felipe Galván-Magaña, David Point, Edouard Kraffe, James Ketchum, Raul Octavio Martinez Rincon, Gauthier Schaal ABSTRACT: The decline of shark populations in the world ocean is affecting ecosystem structure and function in an
04/20/21-NON-LIFE THREATING APPARENT SHARK INCIDENT ON HAWAI‘I ISLAND
Published on 22 Apr, 2021 at 5:00 in Attacks & Incidents | Viewed times | No Comments
News Release DEPARTMENT OF LAND AND NATURAL RESOURCES 20. April 2021 — — — — — — — (HONOLULU) – First responders, officers from the DLNR Division of Conservation and Resources Enforcement (DOCARE) and personnel from the DLNR Division of Aquatic Resources are responding to a report of a non-fatal shark incident near the Kukio
14.5 million-year-old shark-attack on manatee documents oldest predator-prey interaction
Published on 22 Apr, 2021 at 4:14 in Research | Viewed times | No Comments
Press Release Naturhistorisches Museum Wien 06. April 2021 — — — — — — — Researcher of the NHM Vienna identified a fossilized skeleton of a manatee. The bones bear rare fossil bite marks and teeth of a tiger shark were also found next to the skeleton. What do these fossils tell us about life
Tiger shark feeding on sirenian
Tiger shark feeding on sirenian – first fossil evidence from the middle Miocene of the Styrian Basin (Austria) Iris Feichtinger, Ingomar Fritz & Ursula B. Göhlich ABSTRACT: Based on a shark-bitten partial skeleton of an immature sirenian (Metaxytherium cf. medium) from the middle Miocene of the Styrian Basin (Austria), we report on the oldest predator–prey
Older than expected: Teeth reveal the origin of the tiger shark
Press Release Universität Wien 24. March 2021 — — — — — — — — — With a total length of up to 5.5m, the tiger shark is one of the largest predatory sharks known today. This shark is a cosmopolitan species occurring in all oceans worldwide. It is characterized by a striped pattern on
Evolution, diversity, and disparity of the tiger shark lineage Galeocerdo
Evolution, diversity, and disparity of the tiger shark lineage Galeocerdo in deep time Julia Türtscher, Faviel A. López-Romero, Patrick L. Jambura, René Kindlimann, David J. Ward, Jürgen Kriwet ABSTRACT: Sharks have a long and rich fossil record that consists predominantly of isolated teeth due to the poorly mineralized cartilaginous skeleton. Tiger sharks (Galeocerdo), which represent
Fine‐scale oceanographic drivers of reef manta ray visitation patterns at a feeding aggregation site
Fine‐scale oceanographic drivers of reef manta ray (Mobula alfredi) visitation patterns at a feeding aggregation site Joanna L. Harris, Phil Hosegood, Edward Robinson, Clare B. Embling, Simon Hilbourne, Guy M. W. Stevens ABSTRACT: Globally, reef manta rays (Mobula alfredi) are in decline and are particularly vulnerable to exploitation and disturbance at aggregation sites. Here, passive
Notoraja hesperindica sp. nov., a new deep-sea softnose skate
Notoraja hesperindica sp. nov., a new colorful deep-sea softnose skate (Elasmobranchii, Rajiformes, Arhynchobatidae) and first generic record from the western Indian Ocean Simon Weigmann, Bernard Séret, Matthias F. W. Stehmann ABSTRACT: A new deep-sea softnose skate, Notoraja hesperindica, is described based on six specimens caught in 1230–1600 m depths off southern Mozambique and northwestern Madagascar
Regional movements of satellite‐tagged whale sharks in the Gulf of Aden
Regional movements of satellite‐tagged whale sharks Rhincodon typus in the Gulf of Aden Samantha Andrzejaczek, Michel Vély, Daniel Jouannet, David Rowat, Sabrina Fossette ABSTRACT: To gain insight into whale shark (Rhincodon typus) movement patterns in the Western Indian Ocean, we deployed eight pop‐up satellite tags at an aggregation site in the Arta Bay region of
Three-Dimensional Movements and Habitat Selection of Young White Sharks
Three-Dimensional Movements and Habitat Selection of Young White Sharks (Carcharodon carcharias) Across a Temperate Continental Shelf Ecosystem Rachel L. Shaw, Tobey H. Curtis, Gregory Metzger, Michael P. McCallister, Alisa Newton, G. Christopher Fischer, Matthew J. Ajemian ABSTRACT: As highly mobile predators with extensive home ranges, some shark species often utilize a continuum of habitats across
An annotated checklist of the chondrichthyans of South Africa
An annotated checklist of the chondrichthyans of South Africa DAVID A. EBERT, SABINE P. WINTNER, PETER M. KYNE ABSTRACT: An annotated checklist of chondrichthyan fishes (sharks, batoids, and chimaeras) occurring in South African waters is presented. The checklist is the result of decades of research and on-going systematic revisions of the regional fauna. The chondrichthyan