R J Gonzalez

Summary

Affiliation: University of San Diego
Country: USA

Publications

  1. doi request reprint The physiology of hyper-salinity tolerance in teleost fish: a review
    R J Gonzalez
    Department of Biology, University of San Diego, 5998 Alcala Park, San Diego, CA 92110, USA
    J Comp Physiol B 182:321-9. 2012
  2. doi request reprint Impact of ontogenetic changes in branchial morphology on gill function in Arapaima gigas
    R J Gonzalez
    Department of Biology, University of San Diego, 5998 Alcala Park, San Diego, California 92110, USA
    Physiol Biochem Zool 83:322-32. 2010
  3. ncbi request reprint Physiological responses to hyper-saline waters in sailfin mollies (Poecilia latipinna)
    R J Gonzalez
    Department of Biology, University of San Diego, 5998 Alcala Park, San Diego, CA 92110, USA
    Comp Biochem Physiol A Mol Integr Physiol 142:397-403. 2005
  4. ncbi request reprint Diverse strategies for ion regulation in fish collected from the ion-poor, acidic Rio Negro
    R J Gonzalez
    Laboratory of Ecology and Molecular Evolution, National Institute for Amazon Research, Alameda Cosme Ferreira, 1756 69 083 000 Manaus, Amazonas, Brazil
    Physiol Biochem Zool 75:37-47. 2002
  5. ncbi request reprint Effects of water pH and calcium concentration on ion balance in fish of the Rio Negro, Amazon
    R J Gonzalez
    Department of Aquaculture, National Institute for Amazon Research, Manaus Amazonas, Brazil
    Physiol Zool 71:15-22. 1998
  6. ncbi request reprint Protection by natural blackwater against disturbances in ion fluxes caused by low pH exposure in freshwater stingrays endemic to the Rio Negro
    Chris M Wood
    Laboratory of Ecophysiology and Molecular Evolution, National Institute for Amazon Research, Alameda Cosme Ferreira, 1756, 69 083 000 Manaus, Amazonas, Brazil
    Physiol Biochem Zool 76:12-27. 2003
  7. ncbi request reprint Ion regulation in ion-poor acidic water by the blackskirt tetra (Gymnocorymbus ternetzi), a fish native to the Amazon River
    R J Gonzalez
    Department of Biology, University of San Diego, California 92110, USA
    Physiol Zool 70:428-35. 1997
  8. ncbi request reprint Ion and acid-base balance in three species of Amazonian fish during gradual acidification of extremely soft water
    R W Wilson
    Laboratory of Ecophysiology and Molecular Evolution, National Institute for Amazon Research, Alameda Cosme Ferreira, 1756 69 083 000 Manaus, AM, Brazil
    Physiol Biochem Zool 72:277-85. 1999
  9. ncbi request reprint Effect of air breathing on acid-base and ion regulation after exhaustive exercise and during low pH exposure in the bowfin, Amia calva
    R J Gonzalez
    Department of Biology, University of San Diego, 5998 Alcala Park, San Diego, CA 92110, USA
    Physiol Biochem Zool 74:502-9. 2001
  10. ncbi request reprint Ionoregulatory specializations for exceptional tolerance of ion-poor, acidic waters in the neon tetra (Paracheirodon innesi)
    R J Gonzalez
    Department of Biology, University of San Diego, 5998 Alcala Park, San Diego, California 92110
    Physiol Biochem Zool 72:156-63. 1999

Detail Information

Publications15

  1. doi request reprint The physiology of hyper-salinity tolerance in teleost fish: a review
    R J Gonzalez
    Department of Biology, University of San Diego, 5998 Alcala Park, San Diego, CA 92110, USA
    J Comp Physiol B 182:321-9. 2012
    ..These studies provide a general outline of the mechanisms of osmoregulation in these species, but significant questions still remain...
  2. doi request reprint Impact of ontogenetic changes in branchial morphology on gill function in Arapaima gigas
    R J Gonzalez
    Department of Biology, University of San Diego, 5998 Alcala Park, San Diego, California 92110, USA
    Physiol Biochem Zool 83:322-32. 2010
    ..Ammonia excretion also appeared to be impacted by gill changes. Rates of ammonia excretion in larger fish were one third less than that in smaller fish, despite larger fish having blood ammonia concentrations that were twice as high...
  3. ncbi request reprint Physiological responses to hyper-saline waters in sailfin mollies (Poecilia latipinna)
    R J Gonzalez
    Department of Biology, University of San Diego, 5998 Alcala Park, San Diego, CA 92110, USA
    Comp Biochem Physiol A Mol Integr Physiol 142:397-403. 2005
    ..Interestingly, despite higher metabolism, growth was unaffected by hyper-salinity...
  4. ncbi request reprint Diverse strategies for ion regulation in fish collected from the ion-poor, acidic Rio Negro
    R J Gonzalez
    Laboratory of Ecology and Molecular Evolution, National Institute for Amazon Research, Alameda Cosme Ferreira, 1756 69 083 000 Manaus, Amazonas, Brazil
    Physiol Biochem Zool 75:37-47. 2002
    ..This suggests that high concentrations of dissolved organic molecules in the water, which give it its dark tea color, may interact with the branchial epithelium in some protective manner...
  5. ncbi request reprint Effects of water pH and calcium concentration on ion balance in fish of the Rio Negro, Amazon
    R J Gonzalez
    Department of Aquaculture, National Institute for Amazon Research, Manaus Amazonas, Brazil
    Physiol Zool 71:15-22. 1998
    ....
  6. ncbi request reprint Protection by natural blackwater against disturbances in ion fluxes caused by low pH exposure in freshwater stingrays endemic to the Rio Negro
    Chris M Wood
    Laboratory of Ecophysiology and Molecular Evolution, National Institute for Amazon Research, Alameda Cosme Ferreira, 1756, 69 083 000 Manaus, Amazonas, Brazil
    Physiol Biochem Zool 76:12-27. 2003
    ..Natural DOC may act directly at the gills at low pH to exert a protective effect and, when doing so, may override any protective action of Ca(2+) that might otherwise occur...
  7. ncbi request reprint Ion regulation in ion-poor acidic water by the blackskirt tetra (Gymnocorymbus ternetzi), a fish native to the Amazon River
    R J Gonzalez
    Department of Biology, University of San Diego, California 92110, USA
    Physiol Zool 70:428-35. 1997
    ..0 or less because of leaching of Ca2+ from branchial tight junctions, which stimulates ion losses...
  8. ncbi request reprint Ion and acid-base balance in three species of Amazonian fish during gradual acidification of extremely soft water
    R W Wilson
    Laboratory of Ecophysiology and Molecular Evolution, National Institute for Amazon Research, Alameda Cosme Ferreira, 1756 69 083 000 Manaus, AM, Brazil
    Physiol Biochem Zool 72:277-85. 1999
    ..The relative insensitivity of the ionoregulatory system of tambaqui to low pH indicates that this is a feature of fish native to blackwater systems rather than one that is common to all Amazon fish...
  9. ncbi request reprint Effect of air breathing on acid-base and ion regulation after exhaustive exercise and during low pH exposure in the bowfin, Amia calva
    R J Gonzalez
    Department of Biology, University of San Diego, 5998 Alcala Park, San Diego, CA 92110, USA
    Physiol Biochem Zool 74:502-9. 2001
    ....
  10. ncbi request reprint Ionoregulatory specializations for exceptional tolerance of ion-poor, acidic waters in the neon tetra (Paracheirodon innesi)
    R J Gonzalez
    Department of Biology, University of San Diego, 5998 Alcala Park, San Diego, California 92110
    Physiol Biochem Zool 72:156-63. 1999
    ..These results suggest that Ca2+ plays a role in determining branchial ion permeability at high pH but that, at low pH, where Na+ efflux is stimulated, alternate, Ca2+-independent mechanisms are employed to control Na+ efflux...
  11. ncbi request reprint Mechanisms of ion transport in Potamotrygon, a stenohaline freshwater elasmobranch native to the ion-poor blackwaters of the Rio Negro
    Chris M Wood
    Laboratory of Ecophysiology and Molecular Evolution, National Institute for Amazon Research INPA, Alameda Cosme Ferreira, 1756 Aleixo, 69083 000 Manaus, Amazonas, Brazil
    J Exp Biol 205:3039-54. 2002
    ..Ionic transport systems in these freshwater elasmobranchs, although superficially similar to those in some freshwater teleosts, may bear more resemblance to their presumed evolutionary precursors in marine elasmobranchs...
  12. ncbi request reprint Limited extracellular but complete intracellular acid-base regulation during short-term environmental hypercapnia in the armoured catfish, Liposarcus pardalis
    C J Brauner
    Department of Zoology, University of British Columbia, 6270 University Boulevard, Vancouver, B C, Canada
    J Exp Biol 207:3381-90. 2004
    ..The ubiquity of this strategy among Amazonian fishes and the mechanisms employed by L. pardalis are clearly worthy of further study...
  13. ncbi request reprint Metabolic and ionoregulatory responses of the Amazonian cichlid, Astronotus ocellatus, to severe hypoxia
    J G Richards
    Department of Zoology, The University of British Columbia, 6270 University Blvd, Vancouver, BC, Canada V6T 1Z4
    J Comp Physiol B 177:361-74. 2007
    ..Hypoxia caused an increase in Na(+)/K(+) ATPase alpha-subunit mRNA abundance pointing to either reduced mRNA degradation during exposure to hypoxia or enhanced expression of Na(+)/K(+) ATPase alpha-subunit relative to other genes...
  14. ncbi request reprint Hypertonic saline activation of p38 MAPK primes the PMN respiratory burst
    D J Ciesla
    Department of Surgery, Denver Health Medical Center, Colorado 80204, USA
    Shock 16:285-9. 2001
    ..We conclude that severe osmotic shock primes the respiratory burst via p38 MAPK signaling, further supporting the role of this signaling cascade in PMN priming...
  15. ncbi request reprint Hypertonic saline attenuation of the neutrophil cytotoxic response is reversed upon restoration of normotonicity and reestablished by repeated hypertonic challenge
    D J Ciesla
    Department of Surgery, Denver Health Medical Center, Bonfils Blood Center, and the Department of Pediatrics, University of Colorado Health Sciences Center, Denver, CO, USA
    Surgery 129:567-75. 2001
    ..This phenomenon may provide the unique opportunity to selectively and temporarily decrease the postinjury inflammatory response when patients are at greatest risk for PMN-mediated tissue damage...