Scientific Papers

Sexual dimorphisms of the Ampullae of Lorenzini in the lesser-spotted catshark

Sexual dimorphisms of the Ampullae of Lorenzini in the lesser-spotted catshark

Published in May 2013 A study into the sexual dimorphisms of the Ampullae of Lorenzini in the lesser-spotted catshark, Scyliorhinus canicula (Linnaeus, 1758) Neil Crooks, Colin P. Waring ABSTRACT: The Ampullae of Lorenzini can vary in their size, shape and distribution patterns among elasmobranch species. However, no study has compared the ampullary characteristics between the

The influence of gummy sharks on observed fish assemblage structure

The influence of gummy sharks on observed fish assemblage structure

Published in April 2013 The influence of gummy sharks, Mustelus antarcticus, on observed fish assemblage structure J. Klages, A. Broad, B. P. Kelaher, A. R. Davis ABSTRACT: Large predatory fish that alter the behaviour of smaller species may affect visual estimates of abundance by making organisms more or less difficult to observe and quantify. To

First record of a bicephalic embryo of smalltail shark

First record of a bicephalic embryo of smalltail shark

Published on 05. April 2013 First record of a bicephalic embryo of smalltail shark Carcharhinus porosus L. A. Muñoz-Osorio, P. A. Mejía-Falla, A. F. Navia ABSTRACT: This study reports the first bicephalic embryo of smalltail shark Carcharhinus porosus, which was removed from a pregnant female in coastal waters of the tropical eastern Pacific Ocean. The

Two-year migration of adult female white sharks reveals widely separated nursery areas

Two-year migration of adult female white sharks reveals widely separated nursery areas

Two-year migration of adult female white sharks ( Carcharodon carcharias ) reveals widely separated nursery areas and conservation concerns. Michael L. Domeier and Nicole Nasby-Lucas ABSTRACT: Background: Satellite tagging programs have provided detailed information about the migratory patterns of northeastern Pacific white sharks, revealing a seasonal migration between a vast offshore region and coastal aggregation

Shark Tooth Weapons Reflect Shifting Baselines in Central Pacific Predator Assemblies

Shark Tooth Weapons Reflect Shifting Baselines in Central Pacific Predator Assemblies

Published on 03. April 2013 Shark Tooth Weapons from the 19th Century Reflect Shifting Baselines in Central Pacific Predator Assemblies Joshua Drew, Christopher Philipp, Mark W. Westneat ABSTRACT: The reefs surrounding the Gilbert Islands (Republic of Kiribati, Central Pacific), like many throughout the world, have undergone a period of rapid and intensive environmental perturbation over

Age, growth and reproductive biology of the spot-tail shark and the Australian blacktip shark

Age, growth and reproductive biology of the spot-tail shark and the Australian blacktip shark

Published online on 26. March 2013 Age, growth and reproductive biology of the spot-tail shark, Carcharhinus sorrah, and the Australian blacktip shark, C. tilstoni, from the Great Barrier Reef World Heritage Area, north-eastern Australia Alastair V. Harry, Andrew J. Tobin and Colin A. Simpfendorfer ABSTRACT: Understanding the life history of an exploited fish species is

First record of dicephalia in a bull shark foetus from the Gulf of Mexico

First record of dicephalia in a bull shark foetus from the Gulf of Mexico

Published online on 25. March 2013 First record of dicephalia in a bull shark Carcharhinus leucas (Chondrichthyes: Carcharhinidae) foetus from the Gulf of Mexico, U.S.A. C. M. Wagner, P. H. Rice, A. P. Pease ABSTRACT: The first recorded incidence of dicephalia in a bull shark Carcharhinus leucas is reported from a foetus collected by a

Trophic Interactions and Distribution of Some Squaliforme Sharks

Trophic Interactions and Distribution of Some Squaliforme Sharks

Published on 25. March 2013 Trophic Interactions and Distribution of Some Squaliforme Sharks, Including New Diet Descriptions for Deania calcea and Squalus acanthias Matthew R. Dunn, Darren W. Stevens, Jeffrey S. Forman, Amelia Connell ABSTRACT: Squaliforme sharks are a common but relatively vulnerable bycatch in many deep water fisheries. Eleven species of squaliforme shark are

Assessment Technique to Assist Management of the White Shark Cage Dive Industry

Assessment Technique to Assist Management of the White Shark Cage Dive Industry

A Rapid Assessment Technique to Assist Management of the White Shark (Carcharodon Carcharias) Cage Dive Industry, South Australia Russell Bradford and Rachel Robbins ABSTRACT: Port Lincoln, South Australia is the departure port for the only white shark, Carcharodon carcharias, cage dive industry in Australia. Established in the early 1960’s as a niche tourism venture, the

Feeding requirements of white sharks may be higher than thought

Feeding requirements of white sharks may be higher than thought

Published on 18. March 2013 Feeding requirements of white sharks may be higher than originally thought  J. M. Semmens, N. L. Payne, C. Huveneers, D. W. Sims & B. D. Bruce ABSTRACT: Quantifying the energy requirements of animals in nature is critical for understanding physiological, behavioural, and ecosystem ecology; however, for difficult-to-study species such as

Heavy metal concentrations of two highly migratory sharks

Heavy metal concentrations of two highly migratory sharks

Published on 18. March 2013 Heavy metal concentrations of two highly migratory sharks ( Prionace glauca and Isurus oxyrinchus ) in the southeastern Pacific waters: comments on public health and conservation Lopez, S. A. Abarca, N. L. and Meléndez R. ABSTRACT: Despite the importance of sharks in structuring the marine food web, their biomass is

Frequency of Multiple Paternity in Gummy Shark and Rig

Frequency of Multiple Paternity in Gummy Shark and Rig

Published online on 15. March 2013 Frequency of Multiple Paternity in Gummy Shark, Mustelus antarcticus, and Rig, Mustelus lenticulatus, and the Implications of Mate Encounter Rate, Postcopulatory Influences, and Reproductive Mode Jessica J. Boomer, Robert G. Harcourt, Malcolm P. Francis, Terence I. Walker, Juan Matias Braccini and Adam J. Stow ABSTRACT: Elasmobranchs (sharks and rays)

Generalized Linear Models and Generalized Estimation Equations to model at-haulback mortality of blue sharks

Generalized Linear Models and Generalized Estimation Equations to model at-haulback mortality of blue sharks

Published online on 14. March 2013 Application of Generalized Linear Models and Generalized Estimation Equations to model at-haulback mortality of blue sharks captured in a pelagic longline fishery in the Atlantic Ocean Rui Coelho, Paulo Infante, Miguel N. Santos ABSTRACT: At-haulback mortality of blue shark (Prionace glauca) captured by the Portuguese pelagic longline fishery targeting

Oceanic whitetip sharks caught by the Brazilian tuna longline fleet

Oceanic whitetip sharks caught by the Brazilian tuna longline fleet

Size, distribution and catch rates of the oceanic whitetip shark caught by the Brazilian tuna longline fleet Mariana Travassos Tolotti, Paulo Travassos, Flávia Lucena Frédou, Catarina Wor, Fábio Hazin ABSTRACT: Catch and effort data from 14,835 longline sets conducted by foreign tuna longline vessels chartered by Brazil, from 2004 to 2010, were analyzed aiming at

No effect from rare-earth metal deterrent on shark bycatch

No effect from rare-earth metal deterrent on shark bycatch

No effect from rare-earth metal deterrent on shark bycatch in a commercial pelagic longline trial Aurelie Cosandey Godin, Tonya Wimmer, John H. Wang, Boris Worm ABSTRACT: The indiscriminate capture of non-target organisms (bycatch) in commercial fisheries undermines the sustainable development of marine resources. In the Northwest Atlantic, blue sharks (Prionace glauca) account for most of