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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
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
Determining effective acoustic array design for monitoring presence of white sharks
Determining effective acoustic array design for monitoring presence of white sharks Carcharodon carcharias in nearshore habitats Sofia M. Gabriel, T. A. Patterson, J. P. Eveson, J. M. Semmens, D. Harasti, P. A. Butcher, J. L. Y. Spaet, R. W. Bradford ABSTRACT: Inferences regarding animal presence from passive acoustic receiver arrays are driven by the spatial
An identification key for Chondrichthyes egg cases
An identification key for Chondrichthyes egg cases of the Mediterranean and Black Sea C. Mancusi, D. Massi, R. Baino, A. Cariani, V. Crobe, D. A. Ebert, A. Ferrari, C. A. Gordon, G. R. Hoff, S. P. Iglesias, A. Titone, F. Serena ABSTRACT: Chondrichthyan egg cases are important elements for species-specific identification and also provide a
Analysis of sightings of white sharks in Gansbaai
Analysis of sightings of white sharks in Gansbaai (South Africa) P. Micarelli, D. Bonsignori, L. J. V. Compagno, A. Pacifico, C. Romano, F. R. Reinero ABSTRACT: In Gansbaai (South Africa), at Dyer Island Nature Reserve, a large White shark population is present and can be observed due to the support of local ecotourism operators authorised
Summer aggregation of common eagle ray in the Marine Protected Area of the Egadi Islands
Summer aggregation of common eagle ray, Myliobatis aquila (Chondrichthyes: Myliobatidae), in the Marine Protected Area of the Egadi Islands (southwestern Tyrrhenian Sea) Grancagnolo, Desiree & Arculeo, Marco ABSTRACT: We report for the first time in Italian waters a periodic and frequent presence of a summer aggregation of common eagle ray Myliobatis aquila in the island
Specimens of the Pacific longnose chimaera in scientific collections
Specimens of the Pacific longnose chimaera Harriotta raleighana Goode & Bean 1895 from the Mexican Pacific in scientific collections of Mexico and the world Pedro Medina-Rosas, Alma Raymundo-Huizar ABSTRACT: Chimaeras are cartilaginous fish that live in waters more than 200 m deep. There are two species in the Rhinochimaeridae family, where only one, Harriotta raleighana,
Multi-year movements of adult and subadult bull sharks
Multi-year movements of adult and subadult bull sharks (Carcharhinus leucas): philopatry, connectivity, and environmental influences Rider, M.J., McDonnell, L.H. & Hammerschlag, N. ABSTRACT: Understanding the movement ecology of marine species is important for conservation management and monitoring their responses to environmental change. In this study, adult and subadult bull sharks (Carcharhinus leucas; n = 16) were acoustically
The influence of shark behavior and environmental conditions on baited remote underwater video survey results
The influence of shark behavior and environmental conditions on baited remote underwater video survey results James P. Kilfoil, Matthew D. Campbell, Michael R. Heithaus, Yuying Zhang ABSTRACT: Baited remote underwater video systems (BRUVS) have become an important and frequently used tool by resource managers to monitor relative abundances for a variety of marine species. As
High resolution biologging of breaching by basking sharks
High resolution biologging of breaching by the world’s second largest shark species Jessica L. Rudd, Owen M. Exeter, Jackie Hall, Graham Hall, Suzanne M. Henderson, Christopher Kerry, Matthew J. Witt, Lucy A. Hawkes ABSTRACT: Basking sharks, the world’s second largest fish, are endangered globally following two centuries of large-scale exploitation for their oily livers. In