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Cyanobacterial Neurotoxin in Shark Fins
Published on 21. February 2012 Cyanobacterial Neurotoxin β-N-Methylamino-L-alanine (BMAA) in Shark Fins Kiyo Mondo, Neil Hammerschlag, Margaret Basile, John Pablo, Sandra A. Banack and Deborah C. Mash ABSTRACT: Sharks are among the most threatened groups of marine species. Populations are declining globally to support the growing demand for shark fin soup. Sharks are known to
Retinal histogenesis in an elasmobranch species
Published on 14. February 2012 Retinal histogenesis and cell differentiation in an elasmobranch species, the small-spotted catshark Scyliorhinus canicula. Bejarano-Escobar R, Blasco M, Durán AC, Rodríguez C, Martín-Partido G, Francisco-Morcillo J. ABSTRACT : Here we present a detailed study of the major events in the retinal histogenesis in a slow-developing elasmobranch species, the small-spotted catshark,
Clasper of the Southern Thorny Skate Amblyraja doellojuradoi
Published on 3. February 2012. Description of the clasper of the Southern Thorny Skate Amblyraja doellojuradoi (Pozzi, 1935) (Chondrichthyes: Rajidae) Gabriela Delpiani, Daniel E. Figueroa and Ezequiel Mabragaña ABSTRACT: This work constitutes the first description of the clasper of Amblyraja doellojuradoi. The characterization was based on both external morphology and the composition of the internal
A review of elasmobranch research in the Red Sea
Published online on 30. January 2012 J. L. Y. Spaet, S. R. Thorrold, M. L. Berumen. ABSTRACT: Given the global concern about the status of elasmobranch fishes, the paucity of information on elasmobranchs in the Red Sea is worrisome. Management of elasmobranchs in areas other than the Red Sea has been helped by research on
A new species of softnose skate from New Caledonia
Published online on 26. January 2012. Bathyraja leucomelanos, a new species of softnose skate (Chondrichthyes: Arhynchobatidae) from New Caledonia Samuel Paco Iglésias and Lauriana Lévy-Hartmann ABSTRACT: A new species of softnose skate (Arhynchobatidae) is described, based on a single adult male measuring 895 mm TL that was collected at a depth of 953–1,022 m on the Coriolis
Conservation of whale sharks in Eastern Indonesia
Published online on 24. January 2012 Prospects for whale shark conservation in Eastern Indonesia through bajo traditional ecological knowledge and community-based monitoring Natasha E Stacey, Johanna Karam, Mark G Meekan, Samuel Pickering, Jotham Ninef ABSTRACT: The whale shark, Rhincodon typus, is a long-lived migratory species inhabiting tropical and warm-temperate waters worldwide. Seasonal aggregations of whale
Influence of intra-specific predator-prey interactions on juvenile lemon sharks
Published online on 20. January 2012. Deep danger: intra-specific predation risk influences habitat use and aggregation formation of juvenile lemon sharks Negaprion brevirostris Tristan L. Guttridge, Samuel H. Gruber, Bryan R. Franks, Steven T. Kessel, Katie S. Gledhill, Jen Uphill, Jens Krause, David W. Sims ABSTRACT: Non-consumptive or risk effects imposed by predators can influence
Effects of an extreme temperature event on bull sharks
Not published yet Effects of an extreme temperature event on the behavior and age structure of an estuarine top predator, Carcharhinus leucas Philip Matich, Michael R. Heithaus ABSTRACT: The frequency of extreme environmental events is predicted to increase in the future. Understanding the short- and long-term impacts of these extreme events on large-bodied predators will
Mercury in deepwater chondrichthyans off southeastern Australia
Not published yet. Trophic structure and biomagnification of mercury in an assemblage of deepwater chondrichthyans collected off southeastern Australia H. Pethybridge, E. C. V. Butler, D. Cossa, R. Daley, A. Boudou ABSTRACT: Stable isotope ratios of carbon (δ13C) and nitrogen (δ15N) were used to evaluate trophic structure and mercury biomagnification in an assemblage of 16
Living with high concentrations of urea: They can!
Published in Jan 2012 Francesca Trischitta, Caterina Faggio, Agata Torre ABSTRACT: Marine elasmobranchs maintain their body fluid isoosmotic or slightly hyperosmotic to the external medium by the retention of large urea concentrations. This review focuses on the strategies adopted by these fishes to maintain a large outwardly direct concentration gradient of this osmolyte minimizing the
Checklist of Sharks of the Persian Gulf
Published on 20. January 2012 Sharks of the Persian (Arabian) Gulf: a first annotated checklist (Chondrichthyes: Elasmobranchii) Alec B.M. Moore, Robert D. Ward and Richard Peirce. ABSTRACT: The first evidence-based checklist of sharks of the Persian (Arabian) Gulf is presented based on appraisal of primary literature and new data, including identifications verified by COI barcoding.
Contribution to the taxonomy and distribution of rays from Thailand
Published in December 2011 Contribution to the taxonomy and distribution of eight ray species (Chondrichthyes, Batoidea) from coastal waters of Thailand Simon Weigmann ABSTRACT: A collection of 24 rays from eight different species, obtained in 1993 from the marine shelf around Thailand, was examined in this study. The rays were determined, morphometrically and meristically analyzed,
Two new species of deep-sea skates
Published on 10. January 2012 Two new softnose skates of the genus Brochiraja (Rajoidei: Arhynchobatidae) from the deepwater slopes and banks of the Norfolk Ridge (South-West Pacific) Peter R. Last and Bernard Séret ABSTRACT: Two new species of the softnose skate genus Brochiraja are described based on material collected from the Norfolk Ridge in the
Sex-Biased Dispersal in the Scalloped Hammerhead Shark
Published on 10. January 2012 Global Phylogeography with Mixed-Marker Analysis Reveals Male-Mediated Dispersal in the Endangered Scalloped Hammerhead Shark (Sphyrna lewini) Toby S. Daly-Engel, Kanesa D. Seraphin, Kim N. Holland, John P. Coffey, Holly A. Nance, Robert J. Toonen, Brian W. Bowen ABSTRACT: Background The scalloped hammerhead shark, Sphyrna lewini, is a large endangered predator
Review of the taxonomy of chondrichthyan fishes
Published online on 05. January 2012 A review of the taxonomy of chondrichthyan fishes: a modern perspective W. T. White, P. R. Last ABSTRACT: Taxonomic clarity is a fundamental requirement as it forms the foundation of all other life sciences. In the last decade, chondrichthyan taxonomy has undergone a scientific renaissance with >180 new species