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Residency, Habitat Use and Sexual Segregation of White Sharks in South Africa
Published on 28. January 2013 Residency, Habitat Use and Sexual Segregation of White Sharks, Carcharodon carcharias in False Bay, South Africa Alison Kock, M. Justin O’Riain, Katya Mauff, Michael Meÿer, Deon Kotze, Charles Griffiths ABSTRACT: White sharks (Carcharodon carcharias) are threatened apex predators and identification of their critical habitats and how these are used are
Shark-like batoids in Pacific fisheries
Published online on 25. January 2013 Shark-like batoids in Pacific fisheries: prevalence and conservation concerns J. White, M. R. Heupel, C. A. Simpfendorfer, A. J. Tobin ABSTRACT: Shark-like batoids are a group of elasmobranchs with a body form similar to that of sharks (i.e. elongate body, well developed caudal and dorsal fins, and head, gill
Diet of the milk shark in Senegal
Published online on 25. January 2013 Diet of the milk shark, Rhizoprionodon acutus (Chondrichthyes: Carcharhinidae), from the Senegalese coast Ba, B. A., Diop, M. S., Diatta, Y., Justine, D. and Ba, C. T. ABSTRACT: The diet of the milk shark, Rhizoprionodon acutus, from the Senegalese coast (12°30′N–14°45′N) was investigated in 3600 specimens with total lengths
Do elasmobranch and teleost fish experience pain ?
Published online on 20. December 2012 Can fish really feel pain ? J D Rose, R Arlinghaus, S J Cooke, B K Diggles, W Sawynok, E D Stevens, C D L Wynne ABSTRACT: We review studies claiming that fish feel pain and find deficiencies in the methods used for pain identification, particularly for distinguishing unconscious
Attack by a Cookiecutter Shark on a White Shark
Observation of an Attack by a Cookiecutter Shark (Isistius brasiliensis) on a White Shark (Carcharodon carcharias) Mauricio Hoyos-Padilla, Yannis P. Papastamatiou, John O’Sullivan and Christopher G. Lowe ABSTRACT: Cookiecutter sharks (Isistius brasiliensis) are known to attack a wide array of large animals including pelagic fishes, cetaceans, and pinnipeds. Here we add another top predator, the
New Records of the Eastern Pacific black ghostshark with annotations of a juvenile female
Published online on 21. January 2013 New eastern Pacific Ocean records of Hydrolagus melanophasma, with annotations of a juvenile female Aguirre-Villaseñor, H., Salas-Singh, C., Madrid-Vera, J., Martínez-Ortiz, J., Didier, D. A. and Ebert, D. A. ABSTRACT: Two new records of Hydrolagus melanophasma, one juvenile female from off the central Mexican coast and one adult male
The shark Carcharhinus sp. from the Middle Eocene of Jamaica
Published online on 22nd December 2012 The shark Carcharhinus sp. from the Middle Eocene of Jamaica and the Eocene record of Carcharhinus Underwood, C.J. and Gunter G.C. ABSTRACT: An upper tooth of a previously unrecorded species of the shark Carcharhinus was recovered from the Middle Eocene of Jamaica. This represents one of the oldest examples
Feeding ecology and trophic position of a Mediterranean endemic ray
Published online on 15. January 2013 Feeding ecology and trophic position of a Mediterranean endemic ray: consistency between sexes, maturity stages and seasons Joan Navarro, Marta Coll, Marc Preminger, Isabel Palomera ABSTRACT: The study of trophic ecology of marine predators is crucial to better understand the ecological factors that condition their role within marine ecosystems.
Illegal shark fishing in the Galapagos Marine Reserve
Illegal shark fishing in the Galapagos Marine Reserve Lindsey A. Carr, Adrian C. Stier, Katharina Fietz, Ignacio Montero, Austin J. Gallagher, John F. Bruno ABSTRACT: Illegal shark fishing is thought to occur globally, including within so-called “shark sanctuaries”, marine reserves and even inside UNESCO World Heritage sites, such as the Galápagos Islands. Presumably, this is
The role of law in shark-based eco-tourism
The role of law in shark-based eco-tourism: Lessons from Australia Erika J. Techeraa and Natalie Klein ABSTRACT: Marine-based tourism offers opportunities for economic, educational and environmental benefits but is not without risks to people, animals and the environment. If the benefits of this sector are to be harnessed it will require an increasing focus upon
Change in a meso-predator community in response to human impact
Published on 10. January 2013 Long-term change in a meso-predator community in response to prolonged and heterogeneous human impact Francesco Ferretti, Giacomo C. Osio, Chris J. Jenkins, Andrew A. Rosenberg, Heike K. Lotze ABSTRACT: Sharks and rays’ abundance can decline considerably with fishing. Community changes, however, are more complex because of species interactions, and variable
Predator Avoidance in Shark Embryos
Published on 09. January 2013 Survival of the Stillest: Predator Avoidance in Shark Embryos Ryan M. Kempster, Nathan S. Hart, Shaun P. Collin ABSTRACT: Sharks use highly sensitive electroreceptors to detect the electric fields emitted by potential prey. However, it is not known whether prey animals are able to modulate their own bioelectrical signals to
Levels of Mercury in Muscle and Liver of Star-Spotted Dogfish from Japan
Published online on 28. December 2012 Levels of Mercury in Muscle and Liver of Star-Spotted Dogfish (Mustelus manazo) from the Northern Region of Japan: A Comparison with Spiny Dogfish (Squalus acanthias) Tetsuya Endo, Yohsuke Hisamichi, Osamu Kimura, Hideki Ogasawara, Chiho Ohta, Nobuyuki Koga, Yoshihisa Kato, Koichi Haraguchi ABSTRACT: We analyzed mercury (Hg) concentrations in muscle
Seasonal Movements of Tiger Sharks and Green Turtles and Their Predator-Prey Relationship
Published on 19. December 2012 A Comparison of the Seasonal Movements of Tiger Sharks and Green Turtles Provides Insight into Their Predator-Prey Relationship Richard Fitzpatrick, Michele Thums, Ian Bell, Mark G. Meekan, John D. Stevens, Adam Barnett ABSTRACT: During the reproductive season, sea turtles use a restricted area in the vicinity of their nesting beaches,
Bycatch mitigation pingers on shark control nets in Australia
Published online on 13. December 2012 Acoustic characterisation of bycatch mitigation pingers on shark control nets in Queensland, Australia Christine Erbe, Craig McPherson ABSTRACT: The Queensland Shark Control Program (QSCP) uses pingers to prevent marine mammal entanglement in shark control nets along public beaches, in Queensland, Australia. Acoustic emissions of Fumunda F3 (designed for humpback