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Feeding habits of the speckled guitarfish Rhinobatos glaucostigma
Published online on 06. July 2015 Feeding habits of the speckled guitarfish Rhinobatos glaucostigma (Elasmobranchii: Rhinobatidae) R. E. Lara-Mendoza, J. F. Márquez-Farías, J. C. Román-Reyes ABSTRACT: The stomachs of 464 speckled guitarfish Rhinobatos glaucostigma were sampled from the south-eastern Gulf of California (GC) to determine diet composition. Numerical indices and prey-specific index of relative importance
Ultrastructure and composition of teeth from plesiosaurs, dinosaurs, extinct and recent sharks
Published online on 13. July 2015 Dental lessons from past to present: ultrastructure and composition of teeth from plesiosaurs, dinosaurs, extinct and recent sharks Alwina Luebke, Joachim Enax, Kateryna Loza, Oleg Prymak, Peter Gaengler, Helge Fabritius, Dierk Raabe, Matthias Epple ABSTRACT: Teeth represent the hardest tissue in vertebrates and appear very early in their evolution
Public awareness of the economic potential and threats to sharks of a tropical oceanic archipelago in the western South Atlantic
Published online on 19. June 2015 Public awareness of the economic potential and threats to sharks of a tropical oceanic archipelago in the western South Atlantic Ricardo C. Garla, Renato H.A. Freitas, Janaina F. Calado, Gustavo B.C. Paterno, Adriana R. Carvalho ABSTRACT: Conservation actions for sharks are hampered partly by the negative beliefs and inaccurate
Sexual development and maturity scale for the angel shark Squatina squatina
Published online on 11. June 2015 Sexual development and maturity scale for the angel shark Squatina squatina (Elasmobranchii: Squatinidae), with comments on the adequacy of general maturity scales Filip Osaer, Krupskaya Narváez, José G. Pajuelo, José M. Lorenzo ABSTRACT: This paper contributes to the reproductive biology of the genus Squatina and aims to complement the
Standardized catch rate of cockfish, Callorhinchus callorynchus, in a bottom trawl fishery of Patagonia
Published Apr./June 2015 Standardized catch rate of cockfish, Callorhinchus callorynchus, in a bottom trawl fishery of Patagonia: Is it possible its use as a predictor of abundance trend? Juan F. Bernasconi, María Raquel Perier, Edgardo E. Di Giácomo ABSTRACT: The catch per unit of effort (CPUE) data of cockfish, Callorhinchus callorynchus, during 1986-2011 was evaluated
Dusky Snout Catshark (Bythaelurus naylori) – A new species from the southwestern Indian Ocean
Published online in June 2015 A new species of deep-sea catshark (Scyliorhinidae: Bythaelurus) from the southwestern Indian Ocean D.A. Ebert, P.J. Clerkin ABSTRACT: Bythaelurus naylori sp. n. is described based on 41 specimens collected from seamounts in the southwestern Indian Ocean. The new species can be separated from all other Bythaelurus species by a combination
Diet of two commercially important shark species in the United Arab Emirates: milk shark and slit-eye shark
Published online on 17. June 2015 Diet of two commercially important shark species in the United Arab Emirates: milk shark, Rhizoprionodon acutus (Rüppell, 1837), and slit-eye shark, Loxodon macrorhinus (Müller & Henle, 1839) R. W. Jabado, S. M. Al Ghais, W. Hamza, A. C. Henderson, A. A. Al Mesafri ABSTRACT: The diets of the milk
Concentrations of trace elements in a rare and threatened coastal shark from the Arabian Gulf
Published online on 15. June 2015 Concentrations of trace elements in a rare and threatened coastal shark from the Arabian Gulf (smoothtooth blacktip Carcharhinus leiodon) Alec B.M. Moore, Thi Bolam, Brett P. Lyons, Jim R. Ellis ABSTRACT: Kuwait’s waters are one of only two locations where the smoothtooth blacktip shark Carcharhinus leiodon is known to
Body-size trends of the extinct giant shark Carcharocles megalodon
Published online on 04. June 2015 Body-size trends of the extinct giant shark Carcharocles megalodon: a deep-time perspective on marine apex predators Catalina Pimiento, Meghan A. Balk ABSTRACT: The extinct shark Carcharocles megalodon is one of the largest marine apex predators ever to exist. Nonetheless, little is known about its body-size variations through time and
Unexpected Positive Buoyancy in Deep Sea Sharks, Hexanchus griseus, and a Echinorhinus cookei
Published on 10. June 2015 Unexpected Positive Buoyancy in Deep Sea Sharks, Hexanchus griseus, and a Echinorhinus cookei Itsumi Nakamura, Carl G. Meyer, Katsufumi Sato ABSTRACT: We do not expect non air-breathing aquatic animals to exhibit positive buoyancy. Sharks, for example, rely on oil-filled livers instead of gas-filled swim bladders to increase their buoyancy, but
Ontogeny of digestive organs during early developmental stages of the tropical whitespotted bamboo shark
Published online on 09. June 2015 Ontogeny of digestive organs during early developmental stages of the tropical whitespotted bamboo shark, Chiloscyllium plagiosum – a histological study Xiaojin Xu, Yingxue Qin, Gang Luo, Xi Huang, Wen-zheng Zou, Lipin Zheng, Jun Wang, Yongquan Su ABSTRACT: This study was undertaken to address a lack of understanding of the
Drivers of Daily Routines in Blacktip Reef Sharks: Hunt Warm, Rest Warmer?
Published on 10. June 2015 Drivers of Daily Routines in an Ectothermic Marine Predator: Hunt Warm, Rest Warmer? Yannis P. Papastamatiou, Yuuki Y. Watanabe, Darcy Bradley, Laura E. Dee, Kevin Weng, Christopher G. Lowe, Jennifer E. Caselle ABSTRACT : Animal daily routines represent a compromise between maximizing foraging success and optimizing physiological performance, while minimizing
Repeated, long-distance migrations by a philopatric predator targeting highly contrasting ecosystems
Published on 09. June 2015 Repeated, long-distance migrations by a philopatric predator targeting highly contrasting ecosystems James S. E. Lea, Bradley M. Wetherbee, Nuno Queiroz, Neil Burnie, Choy Aming, Lara L. Sousa, Gonzalo R. Mucientes, Nicolas E. Humphries, Guy M. Harvey, David W. Sims, Mahmood S. Shivji ABSTRACT: Long-distance movements of animals are an important
Population Genetics and Relatedness of the Broadnose Sevengill Shark in Two Northeast Pacific Estuaries
Published on 08. June 2015 Preliminary Observations of Population Genetics and Relatedness of the Broadnose Sevengill Shark, Notorynchus cepedianus, in Two Northeast Pacific Estuaries Shawn Larson, Debbie Farrer, Dayv Lowry, David A. Ebert ABSTRACT: The broadnose sevengill shark, Notorynchus cepedianus, a common coastal species in the eastern North Pacific, was sampled during routine capture and
A Gigantic Shark from the Lower Cretaceous Duck Creek Formation of Texas
Published on 03. June 2015 A Gigantic Shark from the Lower Cretaceous Duck Creek Formation of Texas Joseph A. Frederickson , Scott N. Schaefer, Janessa A. Doucette-Frederickson ABSTRACT: Three large lamniform shark vertebrae are described from the Lower Cretaceous of Texas. We interpret these fossils as belonging to a single individual with a calculated total