Results 51 to 60 of about 3,825 (220)

1165. Echinacea purpurea (L.) Moench

Curtis's Botanical Magazine, EarlyView.
Summary Echinacea purpurea (L.) Moench (Compositae: Heliantheae: Zinniinae) is described and illustrated with a colour plate and black and white text figure. An introduction to the history of the appearance of this species in the Magazine appears in brief, together with comments on the treatment of the genus, and the available generic revisions.
Nicholas Hind, Masumi Yamanaka, Naoko Yasue   +2 more
wiley   +1 more source

Processes Driving Iron and Manganese Dispersal From the TAG Hydrothermal Plume (Mid-Atlantic Ridge): Results From a GEOTRACES Process Study

Frontiers in Marine Science, 2020
Hydrothermal vents are a recognized source of trace elements to the ocean inventory. Nevertheless, the contribution of slow-spreading ridges remains poorly resolved.
David González-Santana, Hélène Planquette, Marie Cheize, Marie Cheize, Hannah Whitby, Arthur Gourain, Thomas Holmes, Vivien Guyader, Cécile Cathalot, Ewan Pelleter, Yves Fouquet, Géraldine Sarthou   +11 more
doaj   +1 more source

The Abrupt and Persistent Decline in Recruitment Success in Northeast Arctic Cod: A Review of Probable Causes

Fish and Fisheries, EarlyView.
ABSTRACT Most of the previously large cod stocks in the North Atlantic are depleted to very low levels. A notable exception has been the Northeast Arctic cod inhabiting the Barents Sea. This cod stock reached a record high level around 2013, but since then has declined sharply, with older fish being fished out and few new recruits entering the stock ...
Edda Johannesen, Geir Ottersen, Florian Berg, Bjarte Bogstad, Padmini Dalpadado, Côme Denechaud, Elena Eriksen, Maria Fossheim, Håvard Guldbrandsen Frøysa, Torild Johansen, Knut Korsbrekke, Even Moland, Esben Moland Olsen, Anne Britt Sandø, Georg Skaret, Morten Skogen, Frode Vikebø   +16 more
wiley   +1 more source

South Atlantic Transect: Variations in Oceanic Crustal Structure at 31°S

Geochemistry, Geophysics, Geosystems, 2020
We present an analysis of geophysical data acquired along a transect of 0–62 Ma crust located on the western flank of the Mid‐Atlantic Ridge at 31°S; all crust was formed at the same ridge segment.
G. L. Christeson, R. S. Reece, D. A. Kardell, J. D. Estep, A. Fedotova, J. A. Goff   +5 more
doaj   +1 more source

Giants in the cold: Morphological evidence for vascular heat retention in the viscera but not the skeletal muscle of the basking shark (Cetorhinus maximus)

Journal of Fish Biology, EarlyView.
Abstract Fewer than 50 of the over 30,000 extant species of fishes have developed anatomical specializations facilitating endothermy in specific body regions. The plankton‐feeding basking shark (Cetorhinus maximus), traditionally classified as an ectotherm, was recently shown to have regionally endothermic traits such as centralized red muscle (RM ...
C. Antonia Klöcker, Axel Schlindwein, Martin C. Arostegui, Ingrid M. Bruvold, Joel V. Wernström, Montserrat Martin‐Armas, David W. Sims, Nicolas Straube, Andreas Altenburger, Claudia Junge   +9 more
wiley   +1 more source

On the occurrence of the snakefish Trachinocephalus myops (Aulopiformes: Synodontidae) in the Azores archipelago

Journal of Fish Biology, EarlyView.
Abstract The snakefish Trachinocephalus myops is an Atlantic species distributed in tropical and temperate coastal waters on sandy substrates. This study reports the validated record of an adult T. myops in the Azores archipelago caught by a fisherman at Faial Island.
Iryna Hulevata, Filipe M. Porteiro, Eva Giacomello, Diana Catarino   +3 more
wiley   +1 more source

North Atlantic Western Boundary Currents Are Intense Dissolved Organic Carbon Streams

Frontiers in Marine Science, 2020
In the North Atlantic, there are two main western boundary currents related to the Atlantic Meridional Overturning Circulation (AMOC): the Gulf Stream flowing northward and the Deep Western Boundary Current (DWBC) flowing southward.
Marcos Fontela, Marcos Fontela, Fiz F. Pérez, Herlé Mercier, Pascale Lherminier   +4 more
doaj   +1 more source

Integrative taxonomy reveals four new species of the armoured catfish genus Pareiorhina (Siluriformes: Loricariidae) from the upper Paraná River basin, Brazil

Journal of Fish Biology, EarlyView.
Abstract Four new species of the small‐sized armoured catfish genus Pareiorhina are described from mountain ranges in the Grande River drainage, upper Paraná River basin, based on morphological and molecular species delimitation methods. Molecular analyses based on the cytochrome oxidase subunit I (COI) marker recovered Pareiorhina as polyphyletic ...
Pedro L. C. Uzeda, Luana J. Sartori, Axel M. Katz, Felipe P. Ottoni, Wilson J. E. M. Costa, Francisco Langeani, Valter M. Azevedo‐Santos   +6 more
wiley   +1 more source

Heterogeneity in mantle carbon content from CO2-undersaturated basalts

Nature Communications, 2017
Melting dynamics are affected by the amount of carbon in the Earth’s mantle. Le Voyeret al. report undegassed carbon concentrations from olivine-hosted melt inclusions from the Mid-Atlantic Ridge finding that carbon content varies by two orders of ...
M. Le Voyer, K.A. Kelley, E. Cottrell, E.H. Hauri   +3 more
doaj   +1 more source

Unravelling the skin of the nurse shark: A morphological description of the placoid scales of Ginglymostoma cirratum

Journal of Fish Biology, EarlyView.
Abstract Ginglymostoma cirratum, commonly known as the nurse shark, is a nocturnally active benthic shark, often found in western and eastern Atlantic waters. Although this shark has been well explored in many biological aspects, few studies have thoroughly examined the morphology of its dermal denticles (or placoid scales).
Danilo P. Lima, Aline. N. Poscai, Laura F. Mianutti, Nathalie. M. R. de Abreu, Jade Medeiros, Marcus V. G. Araújo, Frederico. B. de Sousa, João Paulo C. B. da Silva   +7 more
wiley   +1 more source