Scientific Papers

Extinction risk and threat for marine vertebrates in the Eastern Pacific

Extinction risk and threat for marine vertebrates in the Eastern Pacific

Published online on 23. February 2012 Patterns of extinction risk and threat for marine vertebrates and habitat-forming species in the Tropical Eastern Pacific B. A. Polidoro, T. Brooks, K. E. Carpenter, G. J. Edgar, S. Henderson, J. Sanciangco, D. R. Robertson ABSTRACT: Marine conservation activities around the globe are largely undertaken in the absence of comprehensive

Blue shark fin-to-carcass-mass ratios in Spain

Blue shark fin-to-carcass-mass ratios in Spain

Published online on 28. February 2012 Blue shark Prionace glauca fin-to-carcass-mass ratios in Spain and implications for finning ban enforcement  J. Santana-Garcon, S. Fordham, S. Fowler ABSTRACT: This study examines the processing of fins from blue sharks Prionace glauca caught by the Spanish longline fleet and landed in Vigo, Spain, and implications of these practices

Habitat use and spatial segregation of spottail sharks

Habitat use and spatial segregation of spottail sharks

Published online on 02. March 2012 Habitat use and spatial segregation of adult spottail sharks Carcharhinus sorrah in tropical nearshore waters D. M. Knip, M. R. Heupel, C. A. Simpfendorfer ABSTRACT: An array of acoustic receivers deployed in Cleveland Bay, north Queensland, Australia, passively tracked 20 adult spottail sharks Carcharhinus sorrah over 2 years (2009–2010)

New deepwater catshark species from Galapagos

New deepwater catshark species from Galapagos

Published on 05. March 2012 Description of a new species of deepwater catshark, Bythaelurus giddingsi sp. nov., from the Galápagos Islands (Chondrichthyes: Carcharhiniformes: Scyliorhinidae) John E. McCosker, Douglas J. Long & Carole C. Baldwin ABSTRACT: We describe Bythaelurus giddingsi sp. nov. based on 7 specimens collected using the submersible Johnson Sea-Link from deepwater (428–562 m

Elasmobranch Landings in the Persian Gulf Region

Elasmobranch Landings in the Persian Gulf Region

Published online on 21. February 2012 Species, sex, size and male maturity composition of previously unreported elasmobranch landings in Kuwait, Qatar and Abu Dhabi Emirate A. B. M. Moore, I. D. McCarthy, G. R. Carvalho, R. Peirce ABSTRACT: This paper presents data from the first major survey of the diversity, biology and fisheries of elasmobranchs

Post-Capture Survival for Elasmobranchs Discarded in Australia

Post-Capture Survival for Elasmobranchs Discarded in Australia

Published on 27. February 2012 High Post-Capture Survival for Sharks, Rays and Chimaeras Discarded in the Main Shark Fishery of Australia? Matias Braccini, Jay Van Rijn, Lorenz Frick ABSTRACT: Most sharks, rays and chimaeras (chondrichthyans) taken in commercial fisheries are discarded (i.e. returned to the ocean either dead or alive). Quantifying the post-capture survival (PCS)

Cyanobacterial Neurotoxin in Shark Fins

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

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

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

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

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

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

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

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

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