... of fin and body musculature of an amphibious fish, Polypterus senegalus . After examining swimming and walking behaviour in aquatically raised individuals, we show that walking behaviour is characterized by greater absolute duration of muscle activity in most muscles when compared with swimming...

...Daniel J. Lee; Martin Gutbrod; Fernando M. Ferreras; Philip G. D. Matthews ABSTRACT Dragonflies (Odonata, Anisoptera) are amphibiotic; the nymph is aquatic and breathes water using a rectal gill before metamorphosing into the winged adult, which breathes air through spiracles. While...

...Andrea J. Morash; Claire Neufeld; Tyson J. MacCormack; Suzanne Currie ABSTRACT Environmental variability in aquatic ecosystems makes the study of ectotherms complex and challenging. Physiologists have historically overcome this hurdle in the laboratory by using ‘average’ conditions, representative...

...S. P. Yanoviak; D. N. Frederick Upon falling onto the water surface, most terrestrial arthropods helplessly struggle and are quickly eaten by aquatic predators. Exceptions to this outcome mostly occur among riparian taxa that escape by walking or swimming at the water surface. Here we document...

...Roger S. Seymour; Stefan K. Hetz SUMMARY Argyroneta aquatica is a unique air-breathing spider that lives virtually its entire life under freshwater. It creates a dome-shaped web between aquatic plants and fills the diving bell with air carried from the surface. The bell can take up dissolved O 2...

...Angela R. V. Rivera; Richard W. Blob SUMMARY Turtles use their limbs during both aquatic and terrestrial locomotion, but water and land impose dramatically different physical requirements. How must musculoskeletal function be adjusted to produce locomotion through such physically disparate habitats...

...Andrew T. Sensenig; Ken T. Kiger; Jeffrey W. Shultz SUMMARY Aquatic nymphs of the mayfly Centroptilum triangulifer produce ventilatory flow using a serial array of seven abdominal gill pairs that operates across a Reynolds numbers (Re) range from 2 to 22 during ontogeny. Net flow in small animals...

...-capture has been studied much more extensively than the diverse range of prey-processing behaviors that exist among aquatic-feeding vertebrates( Ferry-Graham and Lauder,2001 ). One notable exception, pharyngeal mastication, is governed by a functionally unique pharyngeal jaw apparatus (PJA), which...

..., but are also actively mediated by shifts in the motor output and mechanical behavior of several muscles. * e-mail: ggillis@oeb.harvard.edu 15 09 2000 02 11 2000 © 2000 by Company of Biologists 2000 terrestrial aquatic locomotion muscle electromyography jumping...

...Larry M. Frolich; Andrew A. Biewener ABSTRACT Aquatic neotenic and terrestrial metamorphosed salamanders (Ambystoma tigrinurn) were videotaped simultaneously with electromyographic (EMG) recording from five epaxial myotomes along the animal’s trunk during swimming in a flow tank and trotting...