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XX/XO, a rare sex chromosome system in Potamotrygon freshwater stingray
Published online on 26. September 2013 XX/XO, a rare sex chromosome system in Potamotrygon freshwater stingray from the Amazon Basin, Brazil Francisco Carlos de Souza Valentim, Jorge Ivan Rebelo Porto, Luiz Antonio Carlos Bertollo, Maria Claudia Gross, Eliana Feldberg ABSTRACT: Potamotrygonidae is a representative family of South American freshwater elasmobranchs. Cytogenetic studies were performed in
Abundances of Sharks and Chimaera in the Central Mediterranean Sea
Published on 23. September 2013 Abundances of Demersal Sharks and Chimaera from 1994-2009 Scientific Surveys in the Central Mediterranean Sea Sergio Ragonese, Sergio Vitale, Mark Dimech, Salvatore Mazzola ABSTRACT: Bibliographic and data gathered in scientific bottom trawl surveys carried out off the Southern Coasts of Sicily (Mediterranean Sea), from 1994 to 2009 and between a
Population Expansion and Genetic Structure in Carcharhinus brevipinna
Published on 25. September 2013 Population Expansion and Genetic Structure in Carcharhinus brevipinna in the Southern Indo-Pacific Pascal T. Geraghty, Jane E. Williamson, William G. Macbeth, Sabine P. Wintner, Alastair V. Harry, Jennifer R. Ovenden, Michael R. Gillings ABSTRACT: Background Quantifying genetic diversity and metapopulation structure provides insights into the evolutionary history of a species
Effects of trophic ecology and habitat use on maternal transfer of contaminants in lamniform sharks
Published in September 2013 Effects of trophic ecology and habitat use on maternal transfer of contaminants in four species of young of the year lamniform sharks Kady Lyons, Aaron Carlisle, Antonella Preti, Christopher Mull, Mary Blasius, John O’Sullivan, Chuck Winkler, Christopher G. Lowe ABSTRACT: Organic contaminant and total mercury concentrations were compared in four species
Combined Impacts of Shark Removal and Coral Loss on Coral Reefs
Published on 18. September 2013 Caught in the Middle: Combined Impacts of Shark Removal and Coral Loss on the Fish Communities of Coral Reefs Jonathan L. W. Ruppert, Michael J. Travers, Luke L. Smith, Marie-Josée Fortin, Mark G. Meekan ABSTRACT: Due to human activities, marine and terrestrial ecosystems face a future where disturbances are predicted
Abundance and Distribution of Sharks in Northeast Florida
Published on 06. September 2013 Abundance and Distribution of Sharks in Northeast Florida Waters and Identification of Potential Nursery Habitat Michael McCallister, Ryan Ford, James Gelsleichter ABSTRACT: Sharks are considered top predators in many marine ecosystems and can play an important role in structuring community ecology. As a result, it is necessary to understand the
Compensatory Growth of the Sandbar Shark in the Western North Atlantic
Published on 06. September 2013 Compensatory Growth of the Sandbar Shark in the Western North Atlantic Including the Gulf of Mexico J. G. Romine, J. A. Musick, R. A. Johnson ABSTRACT: The number of Sandbar Sharks Carcharhinus plumbeus in the western North Atlantic Ocean has experienced a drastic decline since the early 1980s, reaching a
Nonlethal and Minimally Invasive Protocol to Study Elasmobranch Reproduction
Published on 06. September 2013 Development of a Nonlethal and Minimally Invasive Protocol to Study Elasmobranch Reproduction Bianca K. Prohaska, Paul C. W. Tsang, William B. Driggers III, Eric R. Hoffmayer, James A. Sulikowski ABSTRACT: An understanding of basic reproductive biology is essential for successful species-specific management of elasmobranch fishes (sharks, skates, and rays). Such
Reproductive Biology of the Cownose Ray in the Charlotte Harbor Estuarine System
Published on 06. September 2013 Reproductive Biology of the Cownose Ray in the Charlotte Harbor Estuarine System, Florida Gregg R. Poulakis ABSTRACT: The Cownose Ray Rhinoptera bonasus is an abundant species in the western Atlantic Ocean, including the Gulf of Mexico, but its reproductive biology is not completely known because of the difficulty of obtaining
Occurrence of an Intersexual Blacktip Shark in the Northern Gulf of Mexico
Published on 06. September 2013 Occurrence of an Intersexual Blacktip Shark in the Northern Gulf of Mexico, with Notes on the Standardization of Classifications for This Condition in Elasmobranchs Jill M. Hendon, David M. Koester, Eric R. Hoffmayer, William B. Driggers III, Angela M. Cicia ABSTRACT : An intersexual Blacktip Shark Carcharhinus limbatus with a
Partial Migration in Tiger Sharks in Hawaii
Telemetry and random walk models reveal complex patterns of partial migration in a large marine predator Yannis Peter Papastamatiou, Carl Gustav Meyer, Felipe Carvalho, Jonathon Dale, Melanie Hutchinson, and Kim Holland ABSTRACT: Animals are often faced with complex movement decisions, particularly those that involve long distance dispersal. Partial migrations are a form of long distance
Mercury and Selenium Concentrations in Marine Biota
Published on 03. September 2013 Contrasting Food Web Factor and Body Size Relationships with Hg and Se Concentrations in Marine Biota Karimi R, Frisk M, Fisher NS ABSTRACT: Marine fish and shellfish are primary sources of human exposure to mercury, a potentially toxic metal, and selenium, an essential element that may protect against mercury bioaccumulation
Responsible Shark Management
PowerPoint Presentation Responsible Shark Use Glenn Sant – TRAFFIC CITES Symposium, Tokyo 2013 PDF – DOWNLOAD
A Case Study of Oceanic Whitetip Shark in the Hawaii-Based Longline Fishery
Published online on 22. August 2013 Model Selection and Multimodel Inference for Standardizing Catch Rates of Bycatch Species: A Case Study of Oceanic Whitetip Shark in the Hawaii-Based Longline Fishery Jon KT Brodziak, William A Walsh ABSTRACT: One key issue for standardizing catch per unit effort (CPUE) of bycatch species is how to model observations
Habitat partitioning and vulnerability of sharks in the Great Barrier Reef
Published online on 27. August 2013 Habitat partitioning and vulnerability of sharks in the Great Barrier Reef Marine Park Daniela M. Ceccarelli, Ashley J. Frisch, Nicholas A. J. Graham, Anthony M. Ayling, Maria Beger ABSTRACT: Sharks present a critical conservation challenge, but little is known about their spatial distribution and vulnerability, particularly in complex seascapes