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Species composition of the largest shark fin retail-market in mainland China
Species composition of the largest shark fin retail-market in mainland China Diego Cardeñosa, Andrew T. Fields, Elizabeth A. Babcock, Stanley K. H. Shea, Kevin A. Feldheim, Demian D. Chapman ABSTRACT: Species-specific monitoring through large shark fin market surveys has been a valuable data source to estimate global catches and international shark fin trade dynamics. Hong
Evolutionary trends of the conserved neurocranium shape in angel sharks
Evolutionary trends of the conserved neurocranium shape in angel sharks (Squatiniformes, Elasmobranchii) Faviel A. López-Romero, Sebastian Stumpf, Cathrin Pfaff, Giuseppe Marramà, Zerina Johanson, Jürgen Kriwet ABSTRACT: Elasmobranchii (i.e., sharks, skates, and rays) forms one of the most diverse groups of marine predators. With a fossil record extending back into the Devonian, several modifications in their
Elasmobranch bycatch distributions and mortality
Elasmobranch bycatch distributions and mortality: insights from the European tropical tuna purse-seine fishery Lyndsay Clavareau, Philippe S. Sabarros, Lauriane Escalle, Pascal Bach, Francisco J. Abascal, Jon Lopez, Hilario Murua, Pedro J. Pascual Alayon, Maria Lourdes Ramos, Jon Ruiz, Bastien Mérigot ABSTRACT: Despite bycatch of elasmobranch (sharks and rays) being a major concern in most fisheries
Estimating marine protected area network benefits for reef sharks
Estimating marine protected area network benefits for reef sharks Gerardo Martín, Mario Espinoza, Michelle Heupel, Colin A. Simpfendorfer ABSTRACT: Animal movement has direct applications in spatial management and conservation planning, yet it is rarely taken into account for the design of natural protected areas. For instance, reef shark species are thought to benefit from marine
Thermal tolerance and hypoxia tolerance are associated in blacktip reef shark neonates
Thermal tolerance and hypoxia tolerance are associated in blacktip reef shark (Carcharhinus melanopterus) neonates Ian A. Bouyoucos, Phillip R. Morrison, Ornella C. Weideli, Eva Jacquesson, Serge Planes, Colin A. Simpfendorfer, Colin J. Brauner, Jodie L. Rummer ABSTRACT: Thermal dependence of growth and metabolism can influence thermal preference and tolerance in marine ectotherms, including threatened and
First records of the seven‐gilled and six‐gilled sharks found in the Galápagos Marine Reserve
First records of the seven‐gilled Notorynchus cepedianus and six‐gilled Hexanchus griseus sharks (Chondrichthyes: Hexanchiformes: Hexanchidae) found in the Galápagos Marine Reserve Salome Buglass, Shannon Nagy, David Ebert, Paulina Sepa, Alan Turchik, Katherine L. C. Bell, Fernando Rivera, Jonatha Giddens ABSTRACT: This study reports the first records of cowsharks (Hexanchidae) in the Galápagos Islands, in particular
Why the Kanak Don’t Fear Sharks
Why the Kanak Don’t Fear Sharks: Myths as a Coherent but Dangerous Mirror of Nature Eric Clua, Jean Guiart ABSTRACT: This study focuses on the important role of sharks in the Melanesian mythology. Based on unpublished stories essentially originating from New Caledonia, we show how strong the links are between myths and the physical environment
Lemon sharks – live fast, die young
Published on 3 Aug, 2020 at 13:48 in Research | Viewed times | No Comments
News Release Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB) 29. July 2020 — — — — — — — Risk-taking individuals are expected to grow better but also die faster than the less explorative individuals. Such trade-offs can maintain multiple phenotypes in a population by allowing individuals with different behavioural strategies to achieve comparable
Personality‐driven life history trade‐offs differ in two subpopulations of free‐ranging predators
Personality‐driven life history trade‐offs differ in two subpopulations of free‐ranging predators Félicie Dhellemmes, Jean‐Sébastien Finger, Matthew J. Smukall, Samuel H. Gruber, Tristan L. Guttridge, Kate L. Laskowski, Jens Krause ABSTRACT: Consistent individual differences in behaviour (i.e. personality) can be explained in an evolutionary context if they are favoured by life history trade‐offs as conceptualized in
The effects of digesting a urea-rich meal on North Pacific spiny dogfish
The effects of digesting a urea-rich meal on North Pacific spiny dogfish (Squalus acanthias suckleyi) J. Lisa Hoogenboom, Alyssa M. Weinrauch, Chris M. Wood, W. Gary Anderson ABSTRACT: Marine elasmobranchs are nitrogen-limited owing to the requirement of nitrogen for both somatic growth and urea-based osmoregulation, and due to the loss of urea across the gills
New mode of oviparous reproduction in sharks
Discovery of a new mode of oviparous reproduction in sharks and its evolutionary implications Nakaya, K., White, W.T. & Ho, H. ABSTRACT: Two modes of oviparity are known in cartilaginous fishes, (1) single oviparity where one egg case is retained in an oviduct for a short period and then deposited, quickly followed by another egg
Microplastics in demersal sharks of the North-East Atlantic
Investigating the presence of microplastics in demersal sharks of the North-East Atlantic Kristian J. Parton, Brendan J. Godley, David Santillo, Muhammad Tausif, Lucy C. M. Omeyer, Tamara S. Galloway ABSTRACT: Microplastic pollution is ubiquitous in the marine environment and is ingested by numerous marine species. Sharks are an understudied group regarding their susceptibility to microplastic
Global status and conservation potential of reef sharks
Global status and conservation potential of reef sharks MacNeil, M.A., Chapman, D.D., Heupel, M. et al. ABSTRACT: Decades of overexploitation have devastated shark populations, leaving considerable doubt as to their ecological status1,2. Yet much of what is known about sharks has been inferred from catch records in industrial fisheries, whereas far less information is available
Identification of a nursery area for the critically endangered hammerhead shark
Identification of a nursery area for the critically endangered hammerhead shark (Sphyrna lewini ) amid intense fisheries in the southern Gulf of Mexico G.A. Cuevas‐Gómez, J.C. Pérez‐Jiménez, I. Méndez‐Loeza, M. Carrera‐Fernández, J.L. Castillo‐Géniz ABSTRACT: Since the 1980s, there has been growing concern in the Mexican Atlantic regarding high catches of neonate and juvenile sharks in
Beach-user perceptions and attitudes towards drone surveillance as a shark-bite mitigation tool
Beach-user perceptions and attitudes towards drone surveillance as a shark-bite mitigation tool Debra Stokes, Kirin Apps, Paul A. Butcher, Betty Weiler, Hanabeth Luke, Andrew P. Colefax ABSTRACT: Management of human-wildlife conflict is often challenging and complex, particularly when the conflict involves sharks. New technologies are being trialled in New South Wales, on Australia’s east coast,