Scientific Papers

Development of the Synarcual in the Elephant Sharks

Development of the Synarcual in the Elephant Sharks

Published on 04. September 2015 Development of the Synarcual in the Elephant Sharks (Holocephali; Chondrichthyes): Implications for Vertebral Formation and Fusion Zerina Johanson, Catherine Boisvert, Anton Maksimenko, Peter Currie, Kate Trinajstic ABSTRACT: The synarcual is a structure incorporating multiple elements of two or more anterior vertebrae of the axial skeleton, forming immediately posterior to the

Evolutionary origins and development of saw-teeth on the sawfish and sawshark rostrum

Evolutionary origins and development of saw-teeth on the sawfish and sawshark rostrum

Published on 02. September 2015 Evolutionary origins and development of saw-teeth on the sawfish and sawshark rostrum (Elasmobranchii; Chondrichthyes) Monique Welten, Moya Meredith Smith, Charlie Underwood, Zerina Johanson ABSTRACT: A well-known characteristic of chondrichthyans (e.g. sharks, rays) is their covering of external skin denticles (placoid scales), but less well understood is the wide morphological diversity

At-vessel and post-release mortality of the dusky and sandbar sharks after longline capture

At-vessel and post-release mortality of the dusky and sandbar sharks after longline capture

Published online on 24. August 2015 At-vessel and post-release mortality of the dusky (Carcharhinus obscurus) and sandbar (C. plumbeus) sharks after longline capture Heather Marshall, Gregory Skomal, , Paige G. Ross, , Diego Bernal ABSTRACT: Since the mid 1990’s, stock assessments of shark populations in the northwest Atlantic by the National Marine Fisheries Service (NMFS)

Selective characteristics of a shark-excluding grid device in a Mediterranean trawl

Selective characteristics of a shark-excluding grid device in a Mediterranean trawl

Published online on 24. August 2015 Selective characteristics of a shark-excluding grid device in a Mediterranean trawl Jure Brčić, Bent Herrmann, Francesco De Carlo, Antonello Sala ABSTRACT: Galeus melastomus (blackmouth catshark) is often caught as bycatch in demersal trawls in the Mediterranean. In order to reduce bycatches of shark we tested an excluder grid with

Assessing Indonesian manta and devil ray populations

Assessing Indonesian manta and devil ray populations

Published on 29. August 2015 Assessing Indonesian manta and devil ray populations through historical landings and fishing community interviews Sarah A. Lewis, Naneng Setiasih, Fahmi, Dharmadi, Mary P. O’Malley, Stuart J. Campbell, Muhammad Yusuf, Abraham Sianipar ABSTRACT: International concern is growing with regard to the sustainability of manta and devil ray (collectively mobulids) fisheries as

The Ecuadorian Artisanal Fishery for Large Pelagics

The Ecuadorian Artisanal Fishery for Large Pelagics

Published on 28. August 2015 The Ecuadorian Artisanal Fishery for Large Pelagics: Species Composition and Spatio-Temporal Dynamics Jimmy Martínez-Ortiz, Alexandre M. Aires-da-Silva, Cleridy E. Lennert-Cody, Mark N. Maunder ABSTRACT: The artisanal fisheries of Ecuador operate within one of the most dynamic and productive marine ecosystems of the world. This study investigates the catch composition of

Connectivity in grey reef sharks determined using empirical and simulated genetic data

Connectivity in grey reef sharks determined using empirical and simulated genetic data

Published online on 28. August 2015 Connectivity in grey reef sharks (Carcharhinus amblyrhynchos) determined using empirical and simulated genetic data Paolo Momigliano, Robert Harcourt, William D. Robbins, Adam Stow ABSTRACT: Grey reef sharks (Carcharhinus amblyrhynchos) can be one of the numerically dominant high order predators on pristine coral reefs, yet their numbers have declined even

Hooks equipped with magnets can increase catches of blue shark by longline fishery

Hooks equipped with magnets can increase catches of blue shark by longline fishery

Published online on 24. August 2015 Hooks equipped with magnets can increase catches of blue shark (Prionace glauca) by longline fishery Sebastián Biton Porsmoguer, Daniela Bănaru, Charles F. Boudouresque, Ivan Dekeyser, Christophe Almarcha ABSTRACT: Blue shark (Prionace glauca) populations are decreasing worldwide and the species is currently classified as near threatened. However, it is the

Angular roughshark in captivity feeding exclusively on elasmobranch eggs: an overlooked feeding niche or a matter of individual taste?

Angular roughshark in captivity feeding exclusively on elasmobranch eggs: an overlooked feeding niche or a matter of individual taste?

Published online on 17. August 2015 Angular roughshark Oxynotus centrina (Squaliformes: Oxynotidae) in captivity feeding exclusively on elasmobranch eggs: an overlooked feeding niche or a matter of individual taste? J. Guallart, P. García-Salinas, A. E. Ahuir-Baraja, M. Guimerans, J. R. Ellis, M. Roche ABSTRACT: A specimen of angular roughshark Oxynotus centrina has been kept successfully

A shift in anterior–posterior positional information underlies the fin-to-limb evolution

A shift in anterior–posterior positional information underlies the fin-to-limb evolution

Published on 18. August 2015 A shift in anterior–posterior positional information underlies the fin-to-limb evolution Koh Onimaru, Shigehiro Kuraku, Wataru Takagi, Susumu Hyodo, James Sharpe, Mikiko Tanaka ABSTRACT: The pectoral fins of ancestral fishes had multiple proximal elements connected to their pectoral girdles. During the fin-to-limb transition, anterior proximal elements were lost and only the

Age and growth of the tiger shark off the east coast of Australia

Age and growth of the tiger shark off the east coast of Australia

Published online on 06. August 2015 Age and growth of the tiger shark Galeocerdo cuvier off the east coast of Australia B. J. Holmes, V. M. Peddemors, A. N. Gutteridge, P. T. Geraghty, R. W. K. Chan, I. R. Tibbetts, M. B. Bennett ABSTRACT: Total lengths (LT) at age and growth rates for south-west Pacific

Differential gene flow patterns for two commercially exploited shark species along the south–west coast of South Africa

Differential gene flow patterns for two commercially exploited shark species along the south–west coast of South Africa

Published online on 04. August 2015 Differential gene flow patterns for two commercially exploited shark species, tope (Galeorhinus galeus) and common smoothhound (Mustelus mustelus) along the south–west coast of South Africa Daphne N. Bitalo, Simo N. Maduna, Charlene da Silva, Rouvay Roodt-Wilding, Aletta E. Bester-van der Merwe ABSTRACT: South Africa’s demersal sharks are threatened by

DNA evidence of the consumption of short-beaked common dolphin by the shortfin mako shark

DNA evidence of the consumption of short-beaked common dolphin by the shortfin mako shark

Published online on 21.July 2015 DNA evidence of the consumption of short-beaked common dolphin Delphinus delphis by the shortfin mako shark Isurus oxyrinchus Sebastián Biton Porsmoguer, Daniela Banaru, Charles F. Boudouresque, Ivan Dekeyser, Amélia Viricel, Manuel Merchán ABSTRACT: Stomachs of shortfin mako sharks Isurus oxyrinchus caught in the northeastern Atlantic by Iberian longliners were analyzed.

The small-scale shark fisheries in the southern Gulf of Mexico

The small-scale shark fisheries in the southern Gulf of Mexico

Published online on 25. July 2015 The small-scale shark fisheries in the southern Gulf of Mexico: Understanding their heterogeneity to improve their management Juan Carlos Pérez-Jiménez, Iván Mendez-Loeza ABSTRACT: Fisheries targeting sharks in the southern Gulf of Mexico are generally restricted to a few months or fish in several months but participate in other fisheries.

Predictive habitat suitability models to aid conservation of elasmobranch diversity in the central Mediterranean Sea

Predictive habitat suitability models to aid conservation of elasmobranch diversity in the central Mediterranean Sea

Published online on 14. August 2015 Predictive habitat suitability models to aid conservation of elasmobranch diversity in the central Mediterranean Sea V. Lauria, M. Gristina, M. J. Attrill, F. Fiorentino, G. Garofalo ABSTRACT: Commercial fisheries have dramatically impacted elasmobranch populations worldwide. With high capture and bycatch rates, the abundance of many species is rapidly declining