Scientific Papers

First record of the marbled ray from Greece

First record of the marbled ray from Greece

First record of the marbled ray, Dasyatis marmorata (Elasmobranchii: Dasyatidae), from Greece (central Aegean Sea) Archontia Chatzispyrou, Chrysoula Gubili, Maria Laiaki, Danai Mantopoulou-Palouka, Stefanos Kavadas ABSTRACT: Currently, seven dasyatid species have been described in the Mediterranean Sea: Bathytoshia lata, Dasyatis marmorata, Dasyatis pastinaca, Dasyatis tortonesei, Himantura uarnak, Pteroplatytrygon violacea and Taeniura grabata. Papaconstantinou (2014) listed

Comparative anatomy of the clasper of catsharks

Comparative anatomy of the clasper of catsharks

Comparative anatomy of the clasper of catsharks and its phylogenetic implications (Chondrichthyes: Carcharhiniformes: Scyliorhinidae) Karla D. A. Soares ABSTRACT: The presence of claspers is one of the main characteristics of the cartilaginous fishes, but its variations across taxa have received limited use in shark systematics and have generally been neglected in descriptions of species. Clasper

New insights into the migration patterns of the scalloped hammerhead shark

New insights into the migration patterns of the scalloped hammerhead shark

New insights into the migration patterns of the scalloped hammerhead shark Sphyrna lewini based on vertebral microchemistry Claire Coiraton, Felipe Amezcua , James T. Ketchum ABSTRACT: The scalloped hammerhead shark Sphyrna lewini is a migratory species that exhibits complex patterns of spatial organization associated with the use of both coastal and oceanic habitats. Information about

Natural tags identify nursery origin of a coastal elasmobranch Carcharhinus leucas

Natural tags identify nursery origin of a coastal elasmobranch Carcharhinus leucas

Natural tags identify nursery origin of a coastal elasmobranch Carcharhinus leucas Thomas C. TinHan, Shannon J. O’Leary, David S. Portnoy, Jay R. Rooker, Carey G. Gelpi, R. J. David Wells ABSTRACT: Traditional methods for evaluating the importance of elasmobranch nursery habitats have focused on estimating densities or abundances of juveniles within individual nurseries; however, rates

Estimates of Age and Growth of Whale Sharks

Estimates of Age and Growth of Whale Sharks

Annual Bands in Vertebrae Validated by Bomb Radiocarbon Assays Provide Estimates of Age and Growth of Whale Sharks Joyce J. L. Ong, Mark G. Meekan, Hua Hsun Hsu, L. Paul Fanning, Steven E. Campana ABSTRACT: Conservation and management strategies for endangered and threatened species require accurate estimates of demographic parameters such as age and growth.

Common thresher shark movement

Common thresher shark movement

Common thresher shark Alopias vulpinus movement: Bayesian inference on a data-limited species Michael J. Kinney, Dovi Kacev, Tim Sippel, Heidi Dewar, Tomoharu Eguchi ABSTRACT: Within the fields of biology and ecology, animal movement is arguably one of the most basic, and yet, often one of the most difficult areas of study. Where and why animals

Long-term monitoring provides insight into estuarine top predator resilience following an extreme weather event

Long-term monitoring provides insight into estuarine top predator resilience following an extreme weather event

Long-term monitoring provides insight into estuarine top predator (Carcharhinus leucas) resilience following an extreme weather event Philip Matich, Bradley A. Strickland, Michael R. Heithaus ABSTRACT: Chronic environmental change threatens biodiversity, but acute disturbance events present more rapid and immediate threats. In 2010, a cold snap across south Florida had wide-ranging impacts, including negative effects on

Trophic resources and mercury exposure of two silvertip shark populations

Trophic resources and mercury exposure of two silvertip shark populations

Trophic resources and mercury exposure of two silvertip shark populations in the Northeast Pacific Ocean Gaël Le Croizier, Anne Lorrain, Gauthier Schaal, James Ketchum, Mauricio Hoyos-Padilla, Lucien Besnard, Jean-Marie Munaron, François Le Loc’h, David Point ABSTRACT: Worldwide shark populations have experienced rapid declines over the last decades, mainly due to overfishing. Marine protected areas (MPAs)

Retinal topography and spectral sensitivity of the Port Jackson shark

Retinal topography and spectral sensitivity of the Port Jackson shark

Retinal topography and spectral sensitivity of the Port Jackson shark (Heterodontus portusjacksoni) Lauren R. Peel, Shaun P. Collin, Nathan S. Hart ABSTRACT: In this study, we investigated the visual system of the Port Jackson shark Heterodontus portusjacksoni, a shallow‐dwelling benthic species and generalist predator endemic to the temperate coastal waters around southern Australia. Measurements of

How Sharks and Shark–Human Interactions are Reported in Major Australian Newspapers

How Sharks and Shark–Human Interactions are Reported in Major Australian Newspapers

How Sharks and Shark–Human Interactions are Reported in Major Australian Newspapers Nigel Hardiman, Shelley Burgin, Jia Shao ABSTRACT: Few phrases evoke more negative emotion, or generate more media coverage, than ‘shark attack’ despite the few deaths that have been attributed to shark bite. Typically, tabloids are considered to provide more sensational coverage than broadsheets. We

Temporal and latitudinal comparisons of reproductive parameters in a heavily exploited shark

Temporal and latitudinal comparisons of reproductive parameters in a heavily exploited shark

Temporal and latitudinal comparisons of reproductive parameters in a heavily exploited shark, the bonnethead, Sphyrna tiburo (L. 1758), in the southern Gulf of Mexico D. Palacios‐Hernández, J.L. Castillo‐Géniz, I. Méndez‐Loeza, J.C. Pérez‐Jiménez ABSTRACT: In the southern Gulf of Mexico, the bonnethead shark, Sphyrna tiburo, is one of the most frequently captured species in landings of

Impact of a simulated marine heatwave in the hematological profile of a temperate shark

Impact of a simulated marine heatwave in the hematological profile of a temperate shark

Impact of a simulated marine heatwave in the hematological profile of a temperate shark (Scyliorhinus canicula) Maria Rita Pegado, Catarina P.Santos, Dayanne Raffoul, Marta Konieczna, Eduardo Sampaio, Ana Luísa Maulvault, Mário Diniz, Rui Rosa ABSTRACT: As Earth’s temperature continues to rise, sudden warming events, designated as marine heatwaves (MHWs), are becoming more frequent and longer.

Artisanal elasmobranch fisheries of northwestern Baja California

Artisanal elasmobranch fisheries of northwestern Baja California

Artisanal elasmobranch fisheries of northwestern Baja California, Mexico Omar Santana-Morales, Daniel Cartamil, Oscar Sosa-Nishizaki, Rebeca Zertuche-Chanes, Enrique Hernández-Gutiérrez, Jeffrey Graham ABSTRACT: Elasmobranch species composition and spatiotemporal variability can often be characterized from landing surveys of local fisheries, with important management implications. In the present study, we describe the elasmobranch landing composition of 4 major artisanal

Ecological risks of demersal fishing on deepwater chondrichthyan populations in the Southern Indian and South Pacific Oceans

Ecological risks of demersal fishing on deepwater chondrichthyan populations in the Southern Indian and South Pacific Oceans

Ecological risks of demersal fishing on deepwater chondrichthyan populations in the Southern Indian and South Pacific Oceans L Georgeson, C L Rigby, T J Emery, M Fuller, J Hartog, A J Williams, A J Hobday, C A J Duffy, C A Simpfendorfer, T Okuda, I C Stobutzki, S J Nicol ABSTRACT: Risks to deepwater chondrichthyans

Spatial distribution and abundance of the by‐catch coastal elasmobranch Raja undulata

Spatial distribution and abundance of the by‐catch coastal elasmobranch Raja undulata

Spatial distribution and abundance of the by‐catch coastal elasmobranch Raja undulata: Managing a fishery after moratorium Ivone Figueiredo, Catarina Maia, Lucília Carvalho ABSTRACT: The undulate ray Raja undulata Lacepède is a coastal species common along the north‐eastern Atlantic Ocean and Mediterranean Sea and is highly accessible to coastal fisheries. Between 2009 and 2015, the species