Scientific Papers

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Branchial osmoregulation in the euryhaline bull shark

Branchial osmoregulation in the euryhaline bull shark

Published on 01 September 2011 Branchial osmoregulation in the euryhaline bull shark, Carcharhinus leucas: a molecular analysis of ion transporters Beau D. Reilly, Rebecca L. Cramp, Jonathan M. Wilson, Hamish A. Campbell and Craig E. Franklin. ABSTRACT: Bull sharks, Carcharhinus leucas, are one of only a few species of elasmobranchs that live in both marine

New species of spurdog shark Squalus formosus

New species of spurdog shark Squalus formosus

Article first published online: 26 AUG 2011 Squalus formosus, a new species of spurdog shark (Squaliformes: Squalidae), from the western North Pacific Ocean W. T. White, S. P. Iglésias ABSTRACT : A new species of spurdog, Squalus formosus n. sp., from the lower continental shelf and upper continental slope off the coast of Taiwan and

New Species of Gollum Shark from the Philippines

New Species of Gollum Shark from the Philippines

Published on 24. August 2011 Gollum suluensis sp. nov. (Carcharhiniformes: Pseudotriakidae), a new gollumshark from the southern Philippines Peter R. Last and Joe P. Gaudiano ABSTRACT: A second nominal species of the pseudotriakid genus Gollum, otherwise known as false catsharks or gollumsharks, is described on the basis of seven specimens collected from the Sulu Sea.

Diving behavior of the giant devil ray in the Mediterranean Sea

Diving behavior of the giant devil ray in the Mediterranean Sea

Published online on 11. August 2011 Simonepietro Canese, Andrea Cardinali, Teresa Romeo, Michela Giusti, Eva Salvati, Michela Angiolillo, Silvestro Greco ABSTRACT: The giant devil ray Mobula mobular is the only mobulid species regularly present in the Mediterranean Sea. The spatial ecology and biology of this species are poorly known, and given its high bycatch mortality,

Analyses of Catch Data for Oceanic Whitetip and Silky Sharks in Hawaii

Analyses of Catch Data for Oceanic Whitetip and Silky Sharks in Hawaii

Analyses of Catch Data for Oceanic Whitetip and Silky Sharks reported by Fishery Observers in the Hawaii-based Longline Fishery in 1995–2010 William A. Walsh and Shelley C. Clarke. ABSTRACT: This report presents descriptive statistical summaries and generalized linear model (GLM) analyses of catch data for oceanic whitetip shark Carcharhinus longimanus and silky shark C. falciformis

An Indicator-based Analysis of Key Shark Species based on Data Held by SPC-OFP

An Indicator-based Analysis of Key Shark Species based on Data Held by SPC-OFP

Shelley Clarke, Shelton Harley, Simon Hoyle and Joel Rice. ABSTRACT: Longline and purse seine logsheet and observer datasets held by SPC-OFP were examined to assess the stock status of eight WCPFC key shark species. Both longline and purse seine logsheet datasets suffer from missing shark catch records and a lack of species-specific recording, therefore the

Decoding fingerprints in two morphologically similar sharks

Decoding fingerprints in two morphologically similar sharks

Published on July 28, 2011. Decoding fingerprints: elemental composition of vertebrae correlates to age-related habitat use in two morphologically similar sharks Bree J. Tillett, Mark G. Meekan, David Parry, Niels Munksgaard, Iain C. Field, Dean Thorburn, Corey J. A. Bradshaw ABSTRACT: We compare vertebral microchemistry with previously described age-related movement patterns of bull sharks Carcharhinus

Dietary metal and macro-nutrient intakes of juvenile lemon sharks

Dietary metal and macro-nutrient intakes of juvenile lemon sharks

Published on July 18, 2011. Dietary metal and macro-nutrient intakes of juvenile lemon sharks determined from the nutritional composition of prey items. Harri Pettitt-Wade, Steven P. Newman, Kristene T. Parsons, Samuel H. Gruber, Richard D. Handy. ABSTRACT: The trace element requirements of sharks are poorly understood and the dietary intake of metals from prey items

Estuarine nursery areas for young bull sharks Carcharhinus leucas

Estuarine nursery areas for young bull sharks Carcharhinus leucas

Published on July 18, 2011. Estuarine nursery areas provide a low-mortality environment for young bull sharks Carcharhinus leucas. Michelle R. Heupel and Colin A. Simpfendorfer ABSTRACT: Defining the role and impact of mortality within aquatic populations is often difficult. As a result, we still lack a clear understanding of the level of mortality in natural

Nursery habitat use and foraging ecology of the brown stingray Dasyatis lata

Nursery habitat use and foraging ecology of the brown stingray Dasyatis lata

Published on July 18, 2011. Nursery habitat use and foraging ecology of the brown stingray Dasyatis lata determined from stomach contents, bulk and amino acid stable isotopes Jonathan J. Dale, Natalie J. Wallsgrove, Brian N. Popp, Kim N. Holland ABSTRACT: Identification of nursery habitats and knowledge of the trophic ecology and habitat use of juvenile

Chimaera opalescens n. sp., a new chimaeroid (Chondrichthyes: Holocephali) from the north-eastern Atlantic Ocean

Chimaera opalescens n. sp., a new chimaeroid (Chondrichthyes: Holocephali) from the north-eastern Atlantic Ocean

Published online on 22 July 2011. E. A. Luchetti, S. P. Iglésias, D. Y. Sellos. ABSTRACT: A new species of chimaeroid, Chimaera opalescens n. sp., was described from 31 type specimens caught in the north-eastern Atlantic Ocean at 950–1400 m depth. This species differed from all its congeners by the combination of the following characters:

Phylogeography of the copper shark (Carcharhinus brachyurus) in the southern hemisphere: implications for the conservation of a coastal apex predator

Phylogeography of the copper shark (Carcharhinus brachyurus) in the southern hemisphere: implications for the conservation of a coastal apex predator

Published on 25 July 2011. Martin T. Benavides, Kevin A. Feldheim, Clinton A. Duffy, Sabine Wintner, J. Matias Braccini, Jessica Boomer , Charlie Huveneers , Paul Rogers, Jeffrey C. Mangel, Joanna Alfaro-Shigueto, Daniel P. Cartamil and Demian D. Chapman. ABSTRACT: The copper or bronze whaler shark (Carcharhinus brachyurus) is a large, coastal top predator that

Age, growth and reproduction of a common deep-water shark, shortspine spurdog (Squalus cf. mitsukurii), from Hawaiian waters

Age, growth and reproduction of a common deep-water shark, shortspine spurdog (Squalus cf. mitsukurii), from Hawaiian waters

Published on 25 July 2011. Charles F. Cotton, R. Dean Grubbs, Toby S. Daly-Engel, Patrick D. Lynch and John A. Musick. ABSTRACT: About half of the extant shark species occur only in deep waters (defined as >200 m depth), yet few published studies on sharks include these taxa. As fisheries worldwide enter deeper waters, the

Similar life history traits in bull (Carcharhinus leucas) and pig-eye (C. amboinensis) sharks

Similar life history traits in bull (Carcharhinus leucas) and pig-eye (C. amboinensis) sharks

Published on 25 July 2011. Bree J. Tillett, Mark G. Meekan, Iain C. Field, Quan Hua  and Corey J. A. Bradshaw . ABSTRACT: Appropriate management strategies for coastal regions require an understanding of how ecological similarities and differences among species shape ecosystem processes. Here, we tested whether morphological similarity equated to similar age and growth

Demographic Processes Underlying Subtle Patterns of Population Structure in the Scalloped Hammerhead Shark, Sphyrna lewini

Demographic Processes Underlying Subtle Patterns of Population Structure in the Scalloped Hammerhead Shark, Sphyrna lewini

Published on 14 July 2011. Nance HA, Klimley P, Galván-Magaña F, Martínez-Ortíz J, Marko PB . ABSTRACT: Genetic diversity (θ), effective population size (Ne), and contemporary levels of gene flow are important parameters to estimate for species of conservation concern, such as the globally endangered scalloped hammerhead shark, Sphyrna lewini. Therefore, we have reconstructed the

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