Scientific Papers

Fishery Catch Characteristics and Population Assessment of the Mako Shark

Fishery Catch Characteristics and Population Assessment of the Mako Shark

Published on 19. May 2013 Research Article Commercial Fishery Catch Characteristics and Population Assessment of the Shortfin Mako Shark (Isurus oxyrinchus) in the Western North Atlantic Ocean Juan C. Levesque ABSTRACT: Pelagic sharks, an oceanic group of sharks, are an incidental bycatch in many global pelagic longline commercial fisheries, including the U.S commercial longline fishery

Trends in sightings and environmental influences on manta rays and whale sharks

Trends in sightings and environmental influences on manta rays and whale sharks

Published on 22. May 2013 Trends in sightings and environmental influences on a coastal aggregation of manta rays and whale sharks C. A. Rohner, S. J. Pierce, A. D. Marshall, S. J. Weeks, M. B. Bennett, A. J. Richardson ABSTRACT: Sightings of planktivorous elasmobranchs at their coastal aggregation sites are often linked to biological, environmental

Effects of scale and habitat distribution on the movement of the southern stingray

Effects of scale and habitat distribution on the movement of the southern stingray

Published on 22. May 2013 Effects of scale and habitat distribution on the movement of the southern stingray Dasyatis americana on a Caribbean atoll Alexander Tilley, Juliana López-Angarita, John R. Turner ABSTRACT: The structure of animal movement paths at varying spatial scales allows insight into the importance of habitat distribution and their response to scale

Resource partitioning and trophic structure of large-bodied marine predators

Resource partitioning and trophic structure of large-bodied marine predators

Published online on 07. May 2013 Apparent resource partitioning and trophic structure of large-bodied marine predators in a relatively pristine seagrass ecosystem Heithaus MR, Vaudo JJ, Kreicker S, Layman CA et al. ABSTRACT: Large predators often play important roles in structuring marine communities. To understand the role that these predators play in ecosystems, it is

The artisanal shark fishery in northern Madagascar

The artisanal shark fishery in northern Madagascar

Published online on 09. May 2013 A first description of the artisanal shark fishery in northern Madagascar: implications for management L Robinson and WHH Sauer ABSTRACT: In the past two decades, small, targeted artisanal shark fisheries have developed in the extreme north of Madagascar, largely in response to the shark fin trade. Few studies have

Dietary partitioning by five stingray species on coral reefs

Dietary partitioning by five stingray species on coral reefs

Published online on 24. April 2013 Dietary partitioning by five sympatric species of stingray (Dasyatidae) on coral reefs O. R. O’Shea, M. Thums, M. van Keulen, R. M. Kempster, M. G. Meekan ABSTRACT: Dietary characteristics and the degree of dietary partitioning by five species of sympatric stingray were assessed using stomach content and sediment analyses

Effects of an Electric Field on White Sharks

Effects of an Electric Field on White Sharks

Published on 02. May 2013 Effects of an Electric Field on White Sharks: In Situ Testing of an Electric Deterrent Charlie Huveneers, Paul J. Rogers, Jayson M. Semmens, Crystal Beckmann, Alison A. Kock, Brad Page, Simon D. Goldsworthy ABSTRACT: Elasmobranchs can detect minute electromagnetic fields, <1 nVcm–1, using their ampullae of Lorenzini. Behavioural responses to

Maternal Offloading of Organic Contaminants in White Sharks

Maternal Offloading of Organic Contaminants in White Sharks

Published on 30. April 2013 Evidence of Maternal Offloading of Organic Contaminants in White Sharks (Carcharodon carcharias) Christopher G. Mull, Kady Lyons, Mary E. Blasius, Chuck Winkler, John B. O’Sullivan, Christopher G. Lowe ABSTRACT: Organic contaminants were measured in young of the year (YOY) white sharks (Carcharodon carcharias) incidentally caught in southern California between 2005

Captures and Diet of Three Sharks Species in the Veracruz Reef System

Captures and Diet of Three Sharks Species in the Veracruz Reef System

Published online in April 2013 Captures and Diet of Three Sharks Species in the Veracruz Reef System José Otilio Avendaño-Alvarez, Horacio Pérez-España, David Salas-Monreal, Emiliano García-Rodríguez ABSTRACT: During July to November of 2008, the artisanal fisheries captured juvenile sharks belonging to the Carcharhinus and Sphyrnidae family in the Veracruz Reef System (south western Gulf of

Behavioural and genetic mating system of the sand tiger shark

Behavioural and genetic mating system of the sand tiger shark

Published on 01. May 2013 The behavioural and genetic mating system of the sand tiger shark, Carcharias taurus, an intrauterine cannibal Demian D. Chapman, Sabine P. Wintner, Debra L. Abercrombie, Jimiane Ashe, Andrea M. Bernard, Mahmood S. Shivji and Kevin A. Feldheim ABSTRACT: Sand tiger sharks (Carcharias taurus) have an unusual mode of reproduction, whereby

Age, growth and reproductive biology of the rough skate off the Gulf of Gabes

Age, growth and reproductive biology of the rough skate off the Gulf of Gabes

Published online on 29. April 2013 Age, growth and reproductive biology of the rough skate, Raja radula (Chondrichthyes: Rajidae), off the Gulf of Gabes (southern Tunisia, central Mediterranean) Hasna Kadri, Sondes Marouani, Mohamed Nejmeddine Bradai and Abderrahmen Bouaïn ABSTRACT: Age, growth and reproductive parameters were estimated for Raja radula from the Gulf of Gabes (southern

Distribution and trend in abundance of the porbeagle in the southern hemisphere

Distribution and trend in abundance of the porbeagle in the southern hemisphere

Published online on 24. April 2013 Distribution and trend in abundance of the porbeagle (Lamna nasus) in the southern hemisphere Yasuko Semba, Kotaro Yokawa, Hiroaki Matsunaga and Hiroshi Shono ABSTRACT: Knowledge of a species’ distribution is an important element in its effective management and conservation. The porbeagle (Lamna nasus) is a common by-catch shark in

Surveys of white sharks off bathing beaches in Algoa Bay

Surveys of white sharks off bathing beaches in Algoa Bay

Published online on 24. April 2013 Surveys of white sharks (Carcharodon carcharias) off bathing beaches in Algoa Bay, South Africa M. L. Dicken and A. J. Booth ABSTRACT: The present study provides information on the existence of a possible inshore nursery area for white sharks (Carcharodon carcharias) in Algoa Bay, South Africa. In total, 43

Dissertation: Feeding Ecology of Skates and Rays in Delaware

Dissertation: Feeding Ecology of Skates and Rays in Delaware

1-1-2013 Feeding Ecology of Skates and Rays in Delaware and Narragansett Bays John Andrew Szczepanski Jr. ABSTRACT: Skates and rays are an integral part of the trophic structure of many estuarine ecosystems. However, there are many aspects of the fisheries biology of these species that require further exploration. For example, few comparisons have been done

Thesis: Survival of the blacktip shark

Thesis: Survival of the blacktip shark

1-1-2013 Survival of the blacktip shark, Carcharhinus limbatus William A. Swinsburg ABSTRACT: Proportional survival (S) is a crucial life-history parameter in population dynamics, natural selection, and management of harvested stocks; variations in survival due to age, sex, or geographic region may have large effects on the success of managing fish stocks. The blacktip shark, Carcharhinus