Scientific Papers

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Analysis of vertebral chemistry to assess stock structure in a deep-sea shark

Analysis of vertebral chemistry to assess stock structure in a deep-sea shark

First published online on 27. October 2016 Analysis of vertebral chemistry to assess stock structure in a deep-sea shark, Etmopterus spinax Matthew N. McMillan, Christopher Izzo, Claudia Junge, Ole Thomas Albert, Armelle Jung, Bronwyn M. Gillanders ABSTRACT: Deep-sea sharks play a valuable ecological role helping maintain food web balance, yet they are vulnerable to commercial

Relations between morphology, buoyancy and energetics of requiem sharks

Relations between morphology, buoyancy and energetics of requiem sharks

Published on 26. October 2016 Relations between morphology, buoyancy and energetics of requiem sharks Gil Iosilevskii, Yannis P. Papastamatiou ABSTRACT: Sharks have a distinctive shape that remained practically unchanged through hundreds of millions of years of evolution. Nonetheless, there are variations of this shape that vary between and within species. We attempt to explain these

Whale Shark Seasonal Occurrence, Abundance and Demographic Structure in the Mid-Equatorial Atlantic Ocean

Whale Shark Seasonal Occurrence, Abundance and Demographic Structure in the Mid-Equatorial Atlantic Ocean

Published online on 26. October 2016 Whale Shark (Rhincodon typus) Seasonal Occurrence, Abundance and Demographic Structure in the Mid-Equatorial Atlantic Ocean Bruno C. L. Macena, Fábio H. V. Hazin ABSTRACT: Whale sharks are generally associated with environmental factors that drive their movements to specific locations where food availability is high. Consequently, foraging is believed to

Visual resolution and contrast sensitivity in two benthic sharks

Visual resolution and contrast sensitivity in two benthic sharks

Published online on 24. October 2016 Visual resolution and contrast sensitivity in two benthic sharks Laura A. Ryan, Nathan S. Hart, Shaun P. Collin, Jan M. Hemmi ABSTRACT: Sharks have long been described as having ‘poor’ vision. They are cone monochromats and anatomical estimates suggest they have low spatial resolution. However, there are no direct

A novel field method to distinguish between Australian blacktip shark and common blacktip shark

A novel field method to distinguish between Australian blacktip shark and common blacktip shark

Published on 24. October 2016 A novel field method to distinguish between cryptic carcharhinid sharks, Australian blacktip shark Carcharhinus tilstoni and common blacktip shark C. limbatus, despite the presence of hybrids G. J. Johnson, R. C. Buckworth, H. Lee1, J. A. T. Morgan, J. R. Ovenden, C. R. McMahon ABSTRACT: Multivariate and machine-learning methods were

How the dogfish shark scavenges ammonia from its environment

How the dogfish shark scavenges ammonia from its environment

Published online on 19. October 2016 Feeding through your gills and turning a toxicant into a resource: how the dogfish shark scavenges ammonia from its environment Chris M. Wood, Marina Giacomin ABSTRACT: Nitrogen (N) appears to be a limiting dietary resource for elasmobranchs, required not only for protein growth but also for urea-based osmoregulation. Building

Global population genetic dynamics of a highly migratory, apex predator shark

Global population genetic dynamics of a highly migratory, apex predator shark

Published on 18. October 2016 Global population genetic dynamics of a highly migratory, apex predator shark Andrea M. Bernard, Kevin A. Feldheim, Michael R. Heithaus, Sabine P. Wintner, Bradley M. Wetherbee, Mahmood S. Shivji ABSTRACT: Knowledge of genetic connectivity dynamics in the world’s large-bodied, highly migratory, apex predator sharks across their global ranges is limited.

Redescription of the Broadfin Shark from the northeastern Arabian Sea

Redescription of the Broadfin Shark from the northeastern Arabian Sea

Published on 13. October 2016 Redescription of the rare and endangered Broadfin Shark Lamiopsis temminckii (Müller & Henle, 1839) (Carcharhiniformes:Carcharhinidae) from the northeastern Arabian Sea K.V. AKHILESH, W.T. WHITE, K.K. BINEESH, G.B. PURUSHOTTAMA, V.V. SINGH, V.V. SINGH, P.U. ZACHARIA ABSTRACT: The genus Lamiopsis (Carcharhinidae) was previously considered to be monotypic, containing only the Broadfin Shark

Parotid duct injury secondary to shark bite injury

Parotid duct injury secondary to shark bite injury

Published online on 11. October 2016 Parotid duct injury secondary to shark bite injury: Repair with a Crawford stent Mallory Highstein, Tristan Tham, Prabhjyot Singh, Peter Costantino ABSTRACT: Introduction Here we present a unique case of repair of a parotid injury caused by a shark attack. The repair technique is of interest due to the

First North Pacific records of the pointy nosed blue chimaera

First North Pacific records of the pointy nosed blue chimaera

Published on 11. October 2016 First North Pacific records of the pointy nosed blue chimaera, Hydrolagus cf. trolli (Chondrichthyes: Chimaeriformes: Chimaeridae) Amber N. Reichert, Lonny Lundsten, David A. Ebert ABSTRACT: The occurrence of Hydrolagus cf. trolli is reported for the first time from the central and eastern North Pacific Ocean. This is a geographic range

Record of a two-headed embryo of Galeus atlanticus and review of the literature

Record of a two-headed embryo of Galeus atlanticus and review of the literature

Published online on 09. October 2016 Dicephalous v. diprosopus sharks: record of a two-headed embryo of Galeus atlanticus and review of the literature V. Sans-Coma, C. Rodríguez, M. A. López-Unzu, M. Lorenzale, B. Fernández, L. Vida, A. C. Durán ABSTRACT: As far as is known, this paper gives the first description of a two-headed shark

New record of the bull shark in an equatorial river system

New record of the bull shark in an equatorial river system

Published online on 06. October 2016 New record of Carcharhinus leucas (Valenciennes, 1839) in an equatorial river system Leonardo Manir Feitosa, Ana Paula Barbosa Martins, Jorge Luiz Silva Nunes ABSTRACT: Bull sharks are a cosmopolitan shark species frequently found in shallow shelf ocean waters and, occasionally, in several tropical river systems around the world. Due

Taxonomic observations on stingrays of the genus Dasyatis in the Gulf of Gabès

Taxonomic observations on stingrays of the genus Dasyatis in the Gulf of Gabès

Published on 04. October 2016 Taxonomic observations on stingrays of the genus Dasyatis (Chondrichthyes: Dasyatidae) in the Gulf of Gabès (Southeastern Mediterranean Sea) ABDESSELEM SAADAOUI, BECHIR SAIDI, AZIZA ELGLID, BERNARD SÉRET, MOHAMED N. BRADAI ABSTRACT: Four species of stingrays of the genus Dasyatis occur in the Gulf of Gabès, but the taxonomic status of one

A new elusive otodontid shark from the lower Miocene

A new elusive otodontid shark from the lower Miocene

Published online on 03 October 2016 A new elusive otodontid shark (Lamniformes: Otodontidae) from the lower Miocene, and comments on the taxonomy of otodontid genera, including the ‘megatoothed’ clade Kenshu Shimada, Richard E. Chandler, Otto Lok Tao Lam, Takeshi Tanaka & David J. Ward ABSTRACT: We describe a new large otodontid lamniform shark, Megalolamna paradoxodon

Complete mitochondrial genome of the porbeagle shark

Complete mitochondrial genome of the porbeagle shark

Published online on 03 October 2016 Complete mitochondrial genome of the porbeagle shark, Lamna nasus (Chondrichthyes, Lamnidae) Píndaro Díaz-Jaimes, Manuel Uribe-Alcocer, Douglas H. Adams, Jose Miguel Rangel-Morales & Natalia J. Bayona-Vásquez ABSTRACT: We report for the first time, the complete mitochondrial genome sequence of the porbeagle shark, Lamna nasus, from a specimen collected from offshore

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