19 research outputs found
Dorsolateral head muscles of the catfish families Nematogenyidae and Trichomycteridae (Siluriformes: Loricarioidei): comparative anatomy and phylogenetic analysis
Full text linkRedescription of the endangered hypoptopomatine catfish Parotocinclus spilurus (Fowler, 1941) (Siluriformes: Loricariidae) from the upper rio Jaguaribe basin, northeastern Brazil
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Temperature dependence of the amplitude of the Shubnikov-De Haas oscillations in a two-dimensional gas
No full textShubnikov-de Haas measurements have been performed on a high-mobility AlxGa1-xAs/GaAs heterostructure as a function of temperature (1.7T4.2 K) and magnetic field strength (0.25 B0.70T). The temperature dependence of the amplitude of the Shubnikov-de Haas oscillations is used to define an effective mass of the two-dimensional electron gas. This apparent mass depends strongly on temperature and magnetic field and decreases to values much smaller than that for the cyclotron mass. The apparent mass shows a scaling behavior as a function of the dimensionless quantit
Kinematics of benthic suction feeding in Callichthyidae and Mochokidae, with functional implications for the evolution of food scraping in catfishes
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Ontogenetic allometries and shape changes in the suckermouth armoured catfish Ancistrus cf. triradiatus Eigenmann (Loricariidae, Siluriformes), related to suckermouth attachment and yolk-sac size
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