... frequencies vs body condition are also available in same data repository. References Amorim , M. C. P. , Simões , J. M. , Mendonça , N. , Bandarra , N. M. , Almada , V. C. and Fonseca , P. J. ( 2010 ). Lusitanian toadfish song reflects male quality . J. Exp. Biol. 213...

...Coen P. H. Elemans; Allen F. Mensinger; Lawrence C. Rome Sound communication is fundamental to many social interactions and essential to courtship and agonistic behaviours in many vertebrates. The swimbladder and associated muscles in batrachoidid fishes (midshipman and toadfish) is a unique...

...Tamara M. Rodela; M. Danielle McDonald; Patrick J. Walsh; Kathleen M. Gilmour SUMMARY Gulf toadfish, Opsanus beta , are one among a group of unusual teleosts that excrete urea as their predominant nitrogen end product in response to stressful conditions. Under conditions of crowding or confinement...

... by apical Cl – /HCO 3 – exchange, with HCO 3 – provided by transepithelial transport and/or by carbonic anhydrase-mediated hydration of endogenous epithelial CO 2 . Hydration of CO 2 also liberates H + ,which is transported across the basolateral membrane. In this study, gulf toadfish ( Opsanus beta ) were...

...John F. Barimo; Patrick J. Walsh SUMMARY Because urea is bioenergetically expensive to synthesize, few aquatic teleostean (bony) fish make or excrete much urea beyond early development and excrete the majority of nitrogenous waste as the readily diffusible ammonia. The gulf toadfish is one of a few...

...Lucy M. Palmer; Max Deffenbaugh; Allen F. Mensinger SUMMARY Inductive neural telemetry was used to record from microwire electrodes chronically implanted into the anterior lateral line nerve of the oyster toadfish, Opsanus tau (L.). The lateral lines of free-ranging toadfish were stimulated...

...John F. Barimo; Shelby L. Steele; Patricia A. Wright; Patrick J. Walsh SUMMARY The marine gulf toadfish ( Opsanus beta ) is an unusual teleost fish as it is able to switch between ammoniotelism and ureotelism in response to a variety of laboratory conditions. The present study integrates field work...

...Teresa Modesto; Adelino V. M. Canário SUMMARY The swimbladder and associated sonic muscle of the Lusitanian toadfish Halobatrachus didactylus increase in size throughout life and are,respectively, 25% and 30% larger in type I (nest-holder) males than females,which may generate sexual differences...

...Ulrike E. Siebeck; Shaun P. Collin; Majid Ghoddusi; N. Justin Marshall SUMMARY The toadfishes Tetractenos hamiltoni and Torquigener pleurogramma (Tetraodontidae) possess occlusable yellow corneas. We examine the light transmission and location of the yellow/orange pigment throughout the cornea...

...Patrick J. Walsh; Gregory D. Mayer; Mónica Medina; Matthew L. Bernstein; John F. Barimo; Thomas P. Mommsen SUMMARY We characterized the expression of the nitrogen metabolism enzyme glutamine synthetase [GSase; L-glutamate: ammonia ligase (ADP-forming), E.C. 6.3.1.2] in tissues of the gulf toadfish...

...Chris M. Wood; K. M. Gilmour; S. F. Perry; P. Part; P. Laurent; Patrick J. Walsh ABSTRACT When toadfish are made ureotelic by a crowding/ confinement protocol, they excrete approximately 90 % of their urea nitrogen (urea-N) production in large, irregular pulses (1–2 pulses per day) from the gill...

...Chris M. Wood; Todd E. Hopkins; Patrick J. Walsh ABSTRACT When subjected to a crowding/confinement protocol in the laboratory, toadfish become facultatively ureotelic, excreting approximately 90 % of their nitrogenous waste as urea-nitrogen (urea-N). The great majority of this excretion occurs via...

...Patrick J. Walsh; Bonnie C. Tucker; Todd E. Hopkins ABSTRACT In order to elucidate the cues for, and the biochemical mechanisms of, the transition to ureogenesis in the gulf toadfish Opsanus beta , experiments on the effects of confinement/crowding were carried out. Confinement of toadfish to small...

... levels. 14 10 1992 © 1993 by Company of Biologists 1993 gas gland hyperoxia pentose phosphate pathway enzyme activities buffering capacity Opsanus beta toadfish In order to address these three facets of the metabolism of the gas gland, we have conducted in vitro...

...Thomas P. Mommsen; Patrick J. Walsh ABSTRACT Viable toadfish hepatocytes were separated into distinct subpopulations by gradient centrifugation. Although 3–5 density subpopulations were obtained for each fish, only two metabolically and enzymatically different subpopulations could be discerned...

... ‘Good’s’ buffers hepatocytes toadfish Opsanus beta buffering capacity intracellular pH Low membrane permeability of these buffers has been predicted based on their high molecular weight and zwitterionic characteristics. However, to my knowledge, no direct studies have been performed...

... 4 + indicate that the toadfish gill is relatively permeable to NH 4 + compared to the shark gill and other ‘tight’ epithelia, consistent with the general conclusion that marine teleost gills are relatively cation-’leaky’. Computation of the relative roles of the three delimited pathways for ammonia...