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Scyliorhinus hachijoensis, a new species of catshark from the Izu Islands
Scyliorhinus hachijoensis, a new species of catshark from the Izu Islands, Japan (Carcharhiniformes: Scyliorhinidae) ITO, N. ., FUJII, M. ., NOHARA, K. ., & TANAKA, S. ABSTRACT: A new species of catshark genus Scyliorhinus, S. hachijoensis sp. nov., is described for the islands of Mikurajima, Hachijojima, and Torishima in southeastern Japan. Scyliorhinus hachijoensis has clasper
Longfin Mako Shark in the Eastern Tropical Pacific
Longfin Mako Shark, Isurus paucus, in the Eastern Tropical Pacific: First Evidence of Trophic Ontogeny Based on the Isotopic Analysis of Long-term Tissues Estupiñán-Montaño, C., Delgado-Huertas, A. ABSTRACT: The ontogeny of pelagic species is difficult to study due to their migratory patterns and the inaccessibility of their habitats, leaving a large part of their life
Drivers of variation in occurrence, abundance, and behaviour of sharks on coral reefs
Drivers of variation in occurrence, abundance, and behaviour of sharks on coral reefs E. Lester, T. Langlois, I. Lindgren, M. Birt, T. Bond, D. McLean, B. Vaughan, T. H. Holmes, M. Meekan ABSTRACT: Quantifying the drivers of population size in reef sharks is critical for the development of appropriate conservation strategies. In north-west Australia, shark
Ocean warming alters the distributional range, migratory timing, and spatial protections of the tiger shark
Ocean warming alters the distributional range, migratory timing, and spatial protections of an apex predator, the tiger shark (Galeocerdo cuvier) Neil Hammerschlag, Laura H. McDonnell, Mitchell J. Rider, Garrett M. Street, Elliott L. Hazen, Lisa J. Natanson, Camilla T. McCandless, Melanie R. Boudreau, Austin J. Gallagher, Malin L. Pinsky, Ben Kirtman ABSTRACT: Given climate change
Shark teeth can resist ocean acidification
Shark teeth can resist ocean acidification Jonathan Y. S. Leung, Ivan Nagelkerken, Jennifer C. A. Pistevos, Zonghan Xie, Sam Zhang, Sean D. Connell ABSTRACT: Ocean acidification can cause dissolution of calcium carbonate minerals in biological structures of many marine organisms, which can be exacerbated by warming. However, it is still unclear whether this also affects
Mercury, Methylmercury and Selenium Concentrations in Elasmobranch Meat
Determination of Mercury, Methylmercury and Selenium Concentrations in Elasmobranch Meat: Fish Consumption Safety Arianna Storelli, Grazia Barone, Rita Garofalo, Antonio Busco, Maria Maddalena Storelli ABSTRACT: This study measures total mercury (THg), methylmercury (MeHg) and selenium (Se) concentrations in elasmobranch fish from an Italian market with the aim of evaluating the risk-benefit associated with their consumption,
Predicting and contextualizing sensitivity to overfishing in Neotropical freshwater stingrays
Predicting and contextualizing sensitivity to overfishing in Neotropical freshwater stingrays (Chondrichthyes: Potamotrygonidae) Lucifora, L.O., Scarabotti, P.A. & Barbini, S.A. ABSTRACT: Neotropical freshwater stingrays (Potamotrygonidae) are conspicuous components of the South American ichthyofauna, and may be regionally important as an economic resource. The smallest individuals are exploited in ornamental fisheries, while large individuals are caught in
Discovery of a putative scalloped hammerhead shark nursery site at the Galapagos Islands
Discovery of a putative scalloped hammerhead shark Sphyrna lewini (Carcharhiniformes: Sphyrnidae) nursery site at the Galapagos Islands, Eastern Tropical Pacific Yasuní Chiriboga-Paredes, Ángela Palomino, Lauren Goodman, Florencia Córdova, Viviana Páez, Manuel Yépez, Salvador Jorgensen, Daniel Armijos, Diana Pazmiño, Alex Hearn ABSTRACT: Sphyrna lewini is a viviparous shark that pups in shallow coastal waters. Given dramatic
Maternal investment evolves with larger body size and higher diversification rate in sharks and rays
Maternal investment evolves with larger body size and higher diversification rate in sharks and rays Christopher G Mull, Matthew W Pennell, Kara E Yopak, Nicholas K Dulvy ABSTRACT: Across vertebrates, live-bearing has evolved at least 150 times from the ancestral state of egg-laying into a diverse array of forms and degrees of prepartum maternal investment.
Cryptic Behaviors and Post-capture Recovery Processes: New Insights From a Threatened Marine Apex Predator
Cryptic Behaviors and Post-capture Recovery Processes: New Insights From a Threatened Marine Apex Predator Richard Grainger, David Raubenheimer, Victor M. Peddemors, Paul A. Butcher, Gabriel E. Machovsky-Capuska ABSTRACT: Multisensor biologging provides a powerful tool for ecological research, enabling fine-scale observation of animals to directly link physiology and movement to behavior across ecological contexts. However, applied
Mode of uterine milk secretion in the white shark
Mode of uterine milk secretion in the white shark Taketeru Tomita, Masaru Nakamura, Ryo Nozu, Nobuhiro Ogawa, Minoru Toda, Keiichi Sato ABSTRACT: Examination of the uterus of a dead female white shark (Carcharodon carcharias), which contained the earliest known white shark embryos, revealed that the uterine wall produces lipid-rich secretion (histotroph or “uterine milk”) for
Squatina mapama n. sp., a new cryptic species of angel shark
Squatina mapama n. sp., a new cryptic species of angel shark (Elasmobranchii: Squatinidae) from the southwestern Caribbean Sea Long, Douglas J.; Ebert, David A.; Tavera, Jose; Acero P., Arturo; Robertson, D.R. ABSTRACT: Integrating both morphological and genetic data, we describe Squatina mapama, a new species of the angel shark genus Squatina, found on the upper
Retrospective stable isotopes of vertebrae reveal sexual ontogenetic patterns and trophic ecology in oceanic whitetip shark
Retrospective stable isotopes of vertebrae reveal sexual ontogenetic patterns and trophic ecology in oceanic whitetip shark, Carcharhinus longimanus Yongfu Shen, Yi Gong, Feng Wu, Yunkai Li ABSTRACT: There is a common phenomenon in nature whereby some animals have differences in their ontogenetic changes in dietary preferences between sexes, especially apex predators. These reflect changes in
Molecular Weight Analysis of Blue Shark Collagen Hydrolysates by GPC-LS
Molecular Weight Analysis of Blue Shark (Prionace glauca) Collagen Hydrolysates by GPC-LS; Effect of High Molecular Weight Hydrolysates on Fibroblast Cultures: mRNA Collagen Type I Expression and Synthesis María Blanco, Noelia Sanz, Ana C. Sánzhez, Begoña Correa, Ricardo I. Pérez-Martín, Carmen G. Sotelo ABSTRACT: High molecular weight (Mw) collagen hydrolysates have been demonstrated to produce
Morphological Traits and Capture Depth of the Norwegian Skate from Two Mediterranean Populations
Morphological Traits and Capture Depth of the Norwegian Skate (Dipturus nidarosiensis (Storm, 1881)) from Two Mediterranean Populations Pierluigi Carbonara, Andrea Bellodi, Walter Zupa, Marilena Donnaloia, Palma Gaudio, Cosmidano Neglia, Maria Cristina Follesa ABSTRACT: The Norwegian skate Dipturus nidarosiensis (Storm, 1881) has only recently been recorded in the western-central Mediterranean Sea. It was hypothesized a more