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Occurrence of White Sharks in Hawaiian Waters
Accepted on 07. March 2013 Occurrence of White Sharks (Carcharodon carcharias) in Hawaiian Waters Kevin Weng and Randy Honebrink ABSTRACT: White sharks (Carcharodon carcharias) have been known in Hawaii (~158°W, 22°N) since the time of ancient Hawaiians. We compiled sightings and records from 1926 to the present (4 females, 2 males, and 8 unknown sex;
Linking sensory biology and fisheries bycatch reduction in elasmobranch fishes
Published on 08. April 2013 Linking sensory biology and fisheries bycatch reduction in elasmobranch fishes: a review with new directions for research Laura K. Jordan, John W. Mandelman, D. Michelle McComb, Sonja V. Fordham, John K. Carlson, and Timothy B. Werner ABSTRACT: Incidental capture, or bycatch, in fisheries represents a substantial threat to the sustainability
Shark predation on cephalopods in Mexico and Ecuador
Published online on 09. April 2013 Shark predation on cephalopods in the Mexican and Ecuadorian Pacific Ocean Felipe Galván-Magaña, Carlos Polo-Silva, Sandra Berenice Hernández-Aguilar, Alejandro Sandoval-Londoño, Maria Ruth Ochoa-Díaz, Nallely Aguilar-Castro, David Castañeda-Suárez, Alejandra Cabrera Chavez-Costa, Álvaro Baigorrí-Santacruz, Yassir Eden Torres-Rojas, Leonardo Andrés Abitia-Cárdenas ABSTRACT: Pelagic predators such as sharks have been shown to be
Microsatellite Analyses of Blacktip Reef Sharks in a Fragmented Environment
Published on 09. April 2013 Microsatellite Analyses of Blacktip Reef Sharks (Carcharhinus melanopterus) in a Fragmented Environment Show Structured Clusters Vignaud T, Clua E, Mourier J, Maynard J, Planes S ABSTRACT: The population dynamics of shark species are generally poorly described because highly mobile marine life is challenging to investigate. Here we investigate the genetic
The first confirmed cases of full albinism in rajid species
Published on 04. April 2013 The first confirmed cases of full albinism in rajid species Ball, R. E., Jones, C. S., Lynghammar, A., Noble, L. R. and Griffiths, A. M. ABSTRACT: Three albino skate specimens (Rajidae) were captured from the North Sea and English Channel between 2008 and 2011. Using DNA barcoding (COI gene) and
White Sharks Scavenging on Whales and Its Role in Further Shaping the Ecology of an Apex Predator
Published on 09. April 2013 White Sharks (Carcharodon carcharias) Scavenging on Whales and Its Potential Role in Further Shaping the Ecology of an Apex Predator Fallows C, Gallagher AJ, Hammerschlag N ABSTRACT: Scavenging, a result of a temporary pulse of resources, occurs in virtually all ecosystems containing carnivores, and is an important energy transfer pathway
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
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
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 ( 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
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
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
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
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
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